Animals

abalone: any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior
Aberdeen Angus: black hornless breed from Scotland
abortus: a human fetus whose weight is less than 0.5 kilogram when removed or expelled from the mother's body
abrocome: ratlike rodent with soft fur and large ears of the Andes
Abudefduf saxatilis: large blue-grey black-striped damselfish; nearly worldwide
Abyssinian cat: a small slender short-haired breed of African origin having brownish fur with a reddish undercoat
Acanthisitta chloris: small green-and-bronze bird
acanthocephalan: any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines
Acanthocybium solandri: large fast-moving predacious food and game fish; found worldwide
Acanthophis antarcticus: venomous Australian snake resembling an adder
acanthopterygian: a teleost fish with fins that are supported by sharp inflexible rays
Acanthoscelides obtectus: larvae live in and feed on growing or stored beans
Acanthurus chirurgus: surgeon fish of the West Indies
acarid: very small free-living arachnid that is parasitic on animals or plants; related to ticks
acarine: mite or tick
accentor: small sparrow-like songbird of mountainous regions of Eurasia
Accipiter cooperii: bluish-grey North American hawk having a darting flight
Accipiter gentilis: large hawk of Eurasia and North America used in falconry
Accipiter nisus: small hawk of Eurasia and northern Africa
Acherontia atropos: European hawkmoth with markings on the back resembling a human skull
Acheta assimilis: common American black cricket; attacks crops and also enters dwellings
Achoerodus gouldii: found around the Great Barrier Reef
Acinonyx jubatus: long-legged spotted cat of Africa and southwestern Asia having nonretractile claws; the swiftest mammal; can be trained to run down game
Acipenser huso: valuable source of caviar and isinglass; found in Black and Caspian seas
Acipenser transmontanus: food and game fish of marine and fresh waters of northwestern coast of North America
acridid: grasshopper with short antennae
Acridotheres tristis: dark brown crested bird of southeastern Asia
Acris crepitans: a cricket frog of eastern and central United States
Acris gryllus: a cricket frog of eastern United States
Acrocephalus schoenobaenus: small European warbler that breeds among reeds and wedges and winters in Africa
acrodont: an animal having teeth consolidated with the summit of the alveolar ridge without sockets
Actias luna: large pale-green American moth with long-tailed hind wings and a yellow crescent-shaped mark on each forewing
actinia: any sea anemone or related animal
actinozoan: sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed
Actitis macularia: common North American sandpiper
Adalia bipunctata: red ladybug with a black spot on each wing
Addax nasomaculatus: large antelope with lightly spiraled horns of desert regions of northern Africa
Adelges abietis: a variety of adelgid
Adelges piceae: a variety of adelgid
adelgid: any of various insects that feed and form galls on conifers
Adenota vardoni: an African antelope closely related to the waterbuck
admiral: any of several brightly colored butterflies
adult: any mature animal
Aedes aegypti: mosquito that transmits yellow fever and dengue
Aegina: small medusa
Aegypius monachus: of southern Eurasia and northern Africa
Aegyptopithecus: extinct primate of about 38 million years ago; fossils found in Egypt
Aepyceros melampus: African antelope with ridged curved horns; moves with enormous leaps
aepyornis: huge (to 9 ft.) extinct flightless bird of Madagascar
Aetobatus narinari: ray with back covered with white or yellow spots; widely distributed in warm seas
affenpinscher: European breed of small dog resembling a terrier with dark wiry hair and a tufted muzzle
Affirmed: thoroughbred that won the triple crown in 1978
Afghan hound: tall graceful breed of hound with a long silky coat; native to the Near East
African clawed frog: a tongueless frog native to Africa; established in the United States as result of release of laboratory and aquarium animals
African hunting dog: a powerful doglike mammal of southern and eastern Africa that hunts in large packs; now rare in settled area
African wild ass: a wild ass of Africa
Africander: tall large-horned humped cattle of South Africa; used for meat or draft
Afropavo congensis: both sexes are brightly colored
agama: small terrestrial lizard of warm regions of the Old World
agamid: a lizard of the family Agamidae
Agelaius phoeniceus: North American blackbird with scarlet patches on the wings
Agkistrodon contortrix: common coppery brown pit viper of upland eastern United States
Agkistrodon piscivorus: venomous semiaquatic snake of swamps in southern United States
agnathan: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
Agonus cataphractus: northern Atlantic sea poacher
Agriocharis ocellata: wild turkey of Central America and northern South America
Ailuropoda melanoleuca: large black-and-white herbivorous mammal of bamboo forests of China and Tibet; in some classifications considered a member of the bear family or of a separate family Ailuropodidae
Ailurus fulgens: reddish-brown Old World raccoon-like carnivore; in some classifications considered unrelated to the giant pandas
Airedale terrier: breed of large wiry-coated terrier bred in Yorkshire
Aix galericulata: showy crested Asiatic duck; often domesticated
Aix sponsa: showy North American duck that nests in hollow trees
Ajaia ajaja: tropical rose-colored New World spoonbill
Alaskan malamute: breed of sled dog developed in Alaska
Alauda arvensis: brown-speckled European lark noted for singing while hovering at a great height
albatross: large web-footed birds of the southern hemisphere having long narrow wings; noted for powerful gliding flight
Albula vulpes: slender silvery marine fish found in tropical mud flats and mangrove lagoons
Alca torda: black-and-white northern Atlantic auk having a compressed sharp-edged bill
Alces alces: large northern deer with enormous flattened antlers in the male; called `elk' in Europe and `moose' in North America
Alectis ciliaris: fish having greatly elongated front rays on dorsal and anal fins
Alectoris graeca: of mountainous areas of southern Europe
Alectoris ruffa: common western European partridge with red legs
Alectura lathami: black megapode of wooded regions of Australia and New Guinea
Algeripithecus minutus: tiny (150 to 300 grams) extinct primate of 46 to 50 million years ago; fossils found in Algeria; considered by some authorities the leading candidate for the first anthropoid
alley cat: a homeless cat
alligator lizard: slim short-limbed lizard having a distinctive fold on each side that permits expansion; of western North America
Alligator mississipiensis: large alligator of the southeastern United States
Alligator sinensis: small alligator of the Yangtze valley of China having unwebbed digits
alligator: either of two amphibious reptiles related to crocodiles but with shorter broader snouts
allosaur: late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus
Alopex lagopus: thickly-furred fox of Arctic regions; brownish in summer and white in winter
Alopius vulpinus: large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed
Alosa alosa: European shad
Alosa chrysocloris: shad that spawns in streams of the Mississippi drainage; very similar to Alosa sapidissima
Alsophila pometaria: North American moth with grey-winged males and wingless females; larvae are fall cankerworms
Alytes cisternasi: similar in habit to Alytes obstetricians
Alytes obstetricans: European toad whose male carries the fertilized eggs wrapped around its hind legs until they hatch
amadavat: red Asian weaverbirds often kept as cage birds
amazon: mainly green tropical American parrots
amberfish: any of several amber to coppery fork-tailed warm-water carangid fishes
Ambloplites rupestris: game and food fish of upper Mississippi and Great Lakes
Amblyrhynchus cristatus: shore-dwelling seaweed-eating lizard of the Galapagos Islands
Ambystoma maculatum: glossy black North American salamander with yellow spots
Ambystoma mexicanum: larval salamander of mountain lakes of Mexico that usually lives without metamorphosing
Ambystoma talpoideum: brownish-black burrowing salamander of southeastern United States
Ambystoma tigrinum: widely distributed brown or black North American salamander with vertical yellowish blotches
ambystomid: small to moderate-sized terrestrial or semiaquatic New World salamander
Ameiurus Melas: catfish common in eastern United States
American badger: a variety of badger native to America
American buffalo: large shaggy-haired brown bison of North American plains
American crayfish: common large crayfishes of eastern North America
American egret: a common egret of the genus Egretta found in America; it is a variety of the Old World white egret Casmerodius albus
American flying squirrel: New World flying squirrels
American foxhound: an American breed of foxhounds used for hunting both in packs and individually
American green toad: small green or yellow-green toad with small black bars and stripes
American harvest mouse: any of several small greyish New World mice inhabiting e.g. grain fields
American mastodont: mastodon of North America; in some classifications considered a mammoth rather than a mastodon
American saddle horse: a high-stepping horse originating in Kentucky
American smooth dogfish: found along the Atlantic coast of the Americas
American Staffordshire terrier: American breed of muscular terriers with a short close-lying stiff coat
American water ouzel: a water ouzel of western North America
American water shrew: water shrew of North America
American water spaniel: breed of medium-sized spaniels originating in America having chocolate or liver-colored curly coat
American widgeon: a widgeon the male of which has a white crown
American woodcock: small long-billed woodcock; prized as a game bird
amethystine python: a python having the color of amethyst
Amia calva: primitive long-bodied carnivorous freshwater fish with a very long dorsal fin; found in sluggish waters of North America
Ammotragus lervia: wild sheep of northern Africa
Amniota: higher vertebrates (reptiles, birds and mammals) possessing an amnion during development
amniote: any member of the Amniota
amphibian: cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form
amphioxus: small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates
amphipod: a kind of malacostracan crustacean
Amphiprion percula: an anemone fish of the genus Amphiprion
amphiuma: aquatic eel-shaped salamander having two pairs of very small feet; of still muddy waters in the southern United States
Anabas testudineus: a small perch of India whose gills are modified to allow it to breathe air; has spiny pectoral fins that enable it to travel on land
Anabrus simplex: large dark wingless cricket-like katydid of arid parts of western United States
anapsid: primitive reptile having no opening in the temporal region of the skull; all extinct except turtles
Anas acuta: long-necked river duck of the Old and New Worlds having elongated central tail feathers
Anas clypeata: freshwater duck of the northern hemisphere having a broad flat bill
Anas crecca: common teal of Eurasia and North America
Anas discors: American teal
Anas penelope: freshwater duck of Eurasia and northern Africa related to mallards and teals
Anas platyrhynchos: wild dabbling duck from which domestic ducks are descended; widely distributed
Anas querquedula: small Eurasian teal
Anas rubripes: a dusky duck of northeastern United States and Canada
Anasa tristis: large black American bug that sucks sap of vines of the gourd family
anaspid: extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian
anatotitan: one of the largest and most famous duck-billed dinosaurs
anchovy: small herring-like plankton-eating fishes often canned whole or as paste; abundant in tropical waters worldwide
Ancylus fluviatilis: minute conical gastropod superficially resembling a limpet but living and feeding on freshwater plants
andrena: a bee that is a member of the genus Andrena
Aneides lugubris: yellow-spotted brown salamander of California woodlands
anemone fish: live associated with sea anemones
anemone: marine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton
angelfish: a butterfly fish of the genus Pomacanthus
anglewing: nymphalid butterfly having angular notches on the outer edges of the forewings
angleworm: terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers
Angora cat: a long-haired breed of cat similar to the Persian cat
Angora goat: a domestic breed of goat raised for its long silky hair which is the true mohair
Angora rabbit: domestic breed of rabbit with long white silky hair
anguid lizard: any of a small family of lizards widely distributed in warm areas; all are harmless and useful as destroyers of e.g. slugs and insects
Anguilla sucklandii: New Zealand eel
Anguillula aceti: minute eelworm that feeds on organisms that cause fermentation in e.g. vinegar
Anguis fragilis: small burrowing legless European lizard with tiny eyes; popularly believed to be blind
Anhima cornuta: screamer having a hornlike process projecting from the forehead
Anhinga anhinga: blackish New World snakebird of swampy regions
anhinga: fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill
ani: black tropical American cuckoo
Anisotremus surinamensis: dusky grey food fish found from Louisiana and Florida southward
Anisotremus virginicus: black and gold grunt found from Bermuda to Caribbean to Brazil
ankylosaur: having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's
annelid: worms with cylindrical bodies segmented both internally and externally
Anoa depressicornis: small buffalo of the Celebes having small straight horns
Anolis carolinensis: small arboreal tropical American insectivorous lizards with the ability to change skin color
Anomala orientalis: introduced into United States from the Orient; larvae feed on roots of sugarcane and other grasses
anomalops: fish having a luminous organ beneath eye; of warm waters of the western Pacific and Puerto Rico
Anomalopteryx oweni: the smallest moa; slender moa about the size of a large turkey
Anomia ephippium: thin-shelled bivalve having the right valve deeply notched
anopheline: any mosquito of the genus Anopheles
Anoplophora glabripennis: a beetle from China that has been found in the United States and is a threat to hardwood trees; lives inside the tree; no natural predators in the United States
Anser anser: common grey wild goose of Europe; ancestor of many domestic breeds
Anser cygnoides: very large wild goose of northeast Asia; interbreeds freely with the greylag
anseriform bird: chiefly web-footed swimming birds
ant bird: any of various dull-colored South American birds that feeding on ants some following army ant swarms
ant cow: excretes a honeylike substance eaten by ants
ant lion: winged insect resembling a dragonfly; the larvae (doodlebugs) dig conical pits where they wait to catch e.g. ants
ant lion: the larva of any of several insects
ant shrike: antbirds superficially resembling shrikes
ant thrush: a kind of antbird
ant: social insect living in organized colonies; characteristically the males and fertile queen have wings during breeding season; wingless sterile females are the workers
anteater: a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia
anteater: a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea
anteater: toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites
antelope: graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles; springboks; impalas; addax; gerenuks; blackbucks; dik-diks
Antheraea mylitta: oriental moth that produces brownish silk
Antheraea pernyi: a Chinese moth that produces a brownish silk
Antheraea polyphemus: very large yellowish-brown American silkworm moth with large eyespots on hind wings; larvae feed on fruit and shade trees
Anthonomus grandis: greyish weevil that lays its eggs in cotton bolls destroying the cotton
Anthrenus scrophulariae: a small black and red and white carpet beetle
anthropoid: any member of the suborder Anthropoidea including monkeys and apes and hominids
anthropoid ape: any tailless ape of the families Pongidae and Hylobatidae
Anthus pratensis: a common pipit that is brown above and white below; widely distributed in northern and central Europe and in Asia
Antidorcas marsupialis: a South African gazelle noted for springing lightly into the air
Antilocapra americana: fleet antelope-like ruminant of western North American plains with small branched horns
Antilope cervicapra: common Indian antelope with a dark back and spiral horns
Antrozous pallidus: drab yellowish big-eared bat that lives in caves
anuran: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species
Aotus trivirgatus: nocturnal monkey of Central America and South America with large eyes and thick fur
Apatosaurus excelsus: huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic
Apatura iris: large European butterfly the male of which has wings shaded with purple
ape: any of various primates with short tails or no tail at all
aphid: any of various small plant-sucking insects
aphid lion: carnivorous larva of lacewing flies
Aphis fabae: blackish aphid that infests e.g. beans and sugar beets
Aphis pomi: bright green aphid; feeds on and causes curling of apple leaves
Aphriza virgata: sandpiper-like shorebird of Pacific coasts of North America and South America
Aphrophora saratogensis: feeds on pines in northern United States
Apis mellifera: social bee often domesticated for the honey it produces
Apis mellifera scutellata: a strain of bees that originated in Brazil in the 1950s as a cross between an aggressive African bee and a honeybee; retains most of the traits of the African bee; now spread as far north as Texas
aplacophoran: deep-water wormlike mollusks lacking calcareous plates on the body but having fine slimy spicules on the covering mantle
Aplodontia rufa: bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodent
Aplysia punctata: naked marine gastropod having a soft body with reduced internal shell and two pairs of ear-like tentacles
apodiform bird: nonpasserine bird having long wings and weak feet; spends much of its time in flight
Apogon maculatus: a cardinalfish found in tropical Atlantic coastal waters
apolemia: large siphonophore of up to 50 ft long
Appaloosa: a hardy breed of saddle horse developed in western North America and characteristically having a spotted rump
appendicularia: free-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates
Appenzeller: a smaller of the four Swiss breeds
Aptenodytes forsteri: the largest penguin; an Antarctic penguin
Aptenodytes patagonica: large penguin on islands bordering the Antarctic Circle
apteryx: nocturnal flightless bird of New Zealand having a long neck and stout legs; only surviving representative of the order Apterygiformes
aquatic bird: wading and swimming and diving birds of either fresh or salt water
aquatic mammal: whales and dolphins; manatees and dugongs; walruses; seals
aquatic vertebrate: animal living wholly or chiefly in or on water
Aquila chrysaetos: large eagle of mountainous regions of the northern hemisphere having a golden-brown head and neck
Aquila rapax: brownish eagle of Africa and parts of Asia
Arabian: a spirited graceful and intelligent riding horse native to Arabia
arachnid: air-breathing arthropods characterized by simple eyes and four pairs of legs
Aramus guarauna: wading bird of South America and Central America
Aramus pictus: wading bird of Florida, Cuba and Jamaica having a drooping bill and a distinctive wailing call
Aranea diademata: a spider common in European gardens
Araneus cavaticus: an orange and tan spider with darkly banded legs that spins an orb web daily
Archaeopteryx lithographica: extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds
archaeornis: extinct primitive toothed bird with a long feathered tail and three free clawed digits on each wing
archiannelid: small primitive marine worm lacking external segmentation and resembling polychaete larvae
Archidiskidon imperator: largest known mammoth; of America
Archilochus colubris: a kind of hummingbird
architeuthis: largest mollusk known about but never seen (to 60 feet long)
Archosargus probatocephalus: large (up to 20 lbs) food fish of the eastern coast of the United States and Mexico
Archosargus rhomboidalis: sea bream of warm Atlantic waters
archosaur: extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts
Arctic ground squirrel: large ground squirrel of the North American far north
Arctictis bintourong: arboreal civet of Asia having a long prehensile tail and shaggy black hair
arctiid: stout-bodied broad-winged moth with conspicuously striped or spotted wings; larvae are hairy caterpillars
Arctocebus calabarensis: a kind of lemur
Arctocephalus philippi: a fur seal of the Pacific coast of California and southward
Arctonyx collaris: southeast Asian badger with a snout like a pig
Ardea herodius: large American heron having bluish-grey plumage
Ardea occidentalis: large white heron of Florida and the Florida Keys
Arenaria interpres: common Arctic turnstone that winters in South America and Australia
Arenaria-Melanocephala: common turnstone of the Pacific coast of North America
argasid: tick lacking a dorsal shield and having mouth parts on the under side of the head
argentine: any of various small silver-scaled salmon-like marine fishes
argentinosaur: huge herbivorous dinosaur of Cretaceous found in Argentina
Argiope aurantia: a widely distributed North American garden spider
Argonauta argo: cephalopod mollusk of warm seas whose females have delicate papery spiral shells
argus: large brilliantly patterned East Indian pheasant
Argyrotaenia citrana: California moth whose larvae live in especially oranges
Arilus cristatus: large predatory North American bug that sucks the blood of other insects
Arizona elegans: nocturnal burrowing snake of western United States with shiny tan scales
ark shell: marine bivalve mollusk having a heavy toothed shell with a deep boat-like inner surface
Arkansas kingbird: a kingbird seen in western United States; head and back are pale grey and the breast is yellowish and the tail is black
armadillo: burrowing chiefly nocturnal mammal with body covered with strong horny plates
armored catfish: South American catfish having the body covered with bony plates
armored dinosaur: dinosaurs having bony armour
armored scale: insect having a firm covering of wax especially in the female
army ant: tropical nomadic ant that preys mainly on other insects
armyworm: larva of fungus gnat that feed on cereals and other grains; they march in large companies in regular order when the food is exhausted
arrowworm: any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth
Artemia salina: common to saline lakes
arthropod: invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
artiodactyl: placental mammal having hooves with an even number of functional toes on each foot
Arvicola amphibius: common large Eurasian vole
Ascaphus trui: western North American frog with a taillike copulatory organ
Ascaridia galli: intestinal parasite of domestic fowl
Ascaris lumbricoides: intestinal parasite of humans and pigs
ascidian: minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves
ascidian tadpole: free-swimming larva of ascidians; they have a tail like a tadpole that contains the notochord
Asian coral snake: of India
Asian horseshoe crab: horseshoe crab of the coast of eastern Asia
Asian tiger mosquito: striped native of Japan thriving in southwestern and midwestern United States and spreading to the Caribbean; potential carrier of serious diseases
Asian wild ox: genus of Asiatic wild oxen
Asiatic flying squirrel: nocturnal rodent of Asia having furry folds of skin between forelegs and hind legs enabling it to move by gliding leaps
Asio otus: slender European owl of coniferous forests with long ear tufts
Aspidelaps lubricus: small widely distributed arboreal snake of southern Africa banded in black and orange
Aspidiotus perniciosus: small east Asian insect naturalized in the United States that damages fruit trees
Aspidophoroides monopterygius: small very elongate sea poachers
ass: hardy and sure-footed animal smaller and with longer ears than the horse
assassin bug: a true bug: long-legged predacious bug living mostly on other insects; a few suck blood of mammals
Assault: thoroughbred that won the triple crown in 1946
Astrophyton muricatum: a variety of basket star
Astropogon stellatus: found in West Indies; lives in mantle cavity of a living conch
Ateles geoffroyi: arboreal monkey of tropical America with long slender legs and long prehensile tail
Athene noctua: small European owl
Atherinopsis californiensis: a relatively large silversides of the Pacific coast of North America (known to reach 18 inches in length)
Atlantic bonito: medium-sized tuna-like food fish of warm Atlantic and Pacific waters; less valued than tuna
Atlantic bottlenose dolphin: the most common dolphin of northern Atlantic and Mediterranean; often kept captive and trained to perform
Atlantic salmon: found in northern coastal Atlantic waters or tributaries; adults do not die after spawning
Atlantic spiny dogfish: destructive dogfish of the Atlantic coastal waters of America and Europe; widely used in anatomy classes
attack dog: a watchdog trained to attack on command
Atticus atlas: giant saturniid moth widespread in Asia; sometimes cultured for silk
auk: black-and-white short-necked web-footed diving bird of northern seas
auklet: any of several small auks of the northern Pacific coasts
Aulostomus maculatus: tropical Atlantic fish with a long snout; swims snout down
Auriparus flaviceps: very small yellow-headed titmouse of western North America
Australian magpie: black-and-white oscine birds that resemble magpies
Australian sea lion: a variety of sea lion found in Australia
Australian stilt: long-legged three-toed wading bird of brackish marshes of Australia
Australian terrier: small greyish wire-haired breed of terrier from Australia similar to the cairn
Australian turtledove: small Australian dove
australopithecine: any of several extinct humanlike bipedal primates with relatively small brains of the genus Australopithecus; from 1 to 4 million years ago
Australopithecus afarensis: fossils found in Ethiopia; from 3.5 to 4 million years ago
Australopithecus africanus: gracile hominid of southern Africa; from about 3 million years ago
Australopithecus boisei: large-toothed hominid of eastern Africa; from 1 to 2 million years ago
Australopithecus robustus: large-toothed hominid of southern Africa; from 1.5 to 2 million years ago; formerly Paranthropus
Automeris io: large yellow American moth having a large eyelike spot on each hind wing; the larvae have stinging spines
Avahi laniger: nocturnal indris with thick grey-brown fur and a long tail
avocet: long-legged web-footed black-and-white shorebird with slender upward-curving bill
Ayrshire: hardy breed of dairy cattle from Ayr, Scotland
Aythya affinis: common scaup of North America; males have purplish heads
Aythya americana: North American diving duck with a grey-and-black body and reddish-brown head
Aythya ferina: heavy-bodied Old World diving duck having a grey-and-black body and reddish head
Aythya marila: large scaup of North America having a greenish iridescence on the head of the male
Aythya valisineria: North American wild duck valued for sport and food
baa-lamb: child's word for a sheep or lamb
babbler: any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae
baboon: large terrestrial monkeys having doglike muzzles
baby: an unborn child; a human fetus
baby: a very young mammal
baby bird: young bird not yet fledged
Babyrousa Babyrussa: Indonesian wild pig with enormous curved canine teeth
badger: sturdy carnivorous burrowing mammal with strong claws; widely distributed in the northern hemisphere
badger dog: small long-bodied short-legged German breed of dog having a short sleek coat and long drooping ears; suited for following game into burrows
Baiomys taylori: very small dark greyish brown mouse resembling a house mouse; of Texas and Mexico
Bairdiella chrysoura: small silvery drumfish often mistaken for white perch; found along coasts of United States from New York to Mexico
Balaena mysticetus: large-mouthed Arctic whale
Balaeniceps rex: large stork-like bird of the valley of the White Nile with a broad bill suggesting a wooden shoe
Balaenoptera acutorostrata: small finback of coastal waters of Atlantic and Pacific
Balaenoptera borealis: similar to but smaller than the finback whale
Balaenoptera musculus: largest mammal ever known; bluish-grey migratory whalebone whale mostly of southern hemisphere
Balaenoptera physalus: large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific
Balanus balanoides: barnacle that attaches to rocks especially in intertidal zones
baleen whale: whale with plates of whalebone along the upper jaw for filtering plankton from the water
Balistes vetula: tropical Atlantic fish
banana quit: any of several honeycreepers
banded gecko: any of several geckos with dark bands across the body and differing from typical geckos in having movable eyelids; of United States southwest and Florida Gulf Coast
bandicoot: any of various agile ratlike terrestrial marsupials of Australia and adjacent islands; insectivorous and herbivorous
bandicoot rat: burrowing scaly-tailed rat of India and Ceylon
bangtail: a horse bred for racing
Bankia setaceae: giant shipworm of the Pacific coast of North America
bantam: any of various small breeds of fowl
barbet: small brightly colored stout-billed tropical bird having short weak wings
bark beetle: small beetle that bores tunnels in the bark and wood of trees; related to weevils
bark louse: any of several insects living on the bark of plants
barker: informal terms for dogs
barking deer: small Asian deer with small antlers and a cry like a bark
barnacle: marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces
barosaur: a dinosaur that could grow to be as tall as a building five stories tall
barracouta: a large marine food fish common on the coasts of Australia, New Zealand, and southern Africa
barracuda: any voracious marine fish of the genus Sphyraena having an elongated cylindrical body and large mouth with projecting lower jaw and long strong teeth
Bartramian sandpiper: large plover-like sandpiper of North American fields and uplands
basenji: small smooth-haired breed of African origin having a tightly curled tail and the inability to bark
basilisk: small crested arboreal lizard able to run on its hind legs; of tropical America
basket fish: any starfish-like animal of the genera Euryale or Astrophyton or Gorgonocephalus having slender complexly branched interlacing arms radiating from a central disc
bass: nontechnical name for any of numerous edible marine and freshwater spiny-finned fishes
Bassariscus astutus: raccoon-like omnivorous mammal of Mexico and the southwestern United States having a long bushy tail with black and white rings
basset: smooth-haired breed of hound with short legs and long ears
bat: nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate
batfish: bottom-dweller of warm western Atlantic coastal waters having a flattened scaleless body that crawls about on fleshy pectoral and pelvic fins
bay: a horse of a moderate reddish-brown color
beach flea: small amphipod crustaceans that hop like fleas; common on ocean beaches
beagle: a small short-legged smooth-coated breed of hound
beaked whale: any of several whales inhabiting all oceans and having beaklike jaws with vestigial teeth in the upper jaw
bear: massive plantigrade carnivorous or omnivorous mammals with long shaggy coats and strong claws
bear cub: a young bear
beard worm: slender animal with tentacles and a tubelike outer covering; lives on the deep ocean bottom
beast of burden: an animal such as a donkey or ox or elephant used for transporting loads or doing other heavy work
beaver: large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges
beaver rat: amphibious rat of Australia and New Guinea
Bedlington terrier: a light terrier groomed to resemble a lamb
bee: any of numerous hairy-bodied insects including social and solitary species
bee beetle: European beetle; infests beehives
bee eater: colorful chiefly tropical Old World bird having a strong graceful flight; feeds on especially bees
bee fly: hairy nectar-eating fly that resembles a bee; larvae are parasitic on larvae of bees and related insects
bee killer: swift predatory fly having a strong body like a bee with the proboscis hardened for sucking juices of other insects captured on the wing
beef: cattle that are reared for their meat
beefalo: hardy breed of cattle resulting from crossing domestic cattle with the American buffalo; yields leaner beef than conventional breeds
beetle: insect having biting mouthparts and front wings modified to form horny covers overlying the membranous rear wings
Belgian hare: red breed of domestic rabbits; hybrid between Old World rabbit and hare
Belgian shepherd: hardy working dog developed in Belgium for herding sheep
bell magpie: bluish black fruit-eating bird with a bell-like call
bellbird: any of several tropical American birds of the genus Procnias having a bell-like call
bellows fish: small bottom-dwelling fish of warm seas having a compressed body and a long snout with a toothless mouth
bellwether: sheep that leads the herd often wearing a bell
Bemisia tabaci: a strain of pest accidentally imported into Florida from the Middle East then spread to California where it is a very serious pest feeding on almost all vegetable crops and poinsettias
Bengal tiger: southern short-haired tiger
Bernese mountain dog: large powerful long-haired black-coated Swiss dog with deep tan or russet markings on legs and white blaze and feet and chest marking; formerly used for draft
beroe: delicately iridescent thimble-shaped ctenophores
bettong: short-nosed rat kangaroo
Bibos frontalis: ox of southeast Asia sometimes considered a domesticated breed of the gaur
Bibos gaurus: wild ox of mountainous areas of eastern India
biddy: young bird especially of domestic fowl
biddy: adult female chicken
big bedbug: large bloodsucking bug
big cat: any of several large cats typically able to roar and living in the wild
big game: large animals that are hunted for sport
bigeye: red fishes of American coastal tropical waters having very large eyes and rough scales
billfish: giant warm-water game fish having a prolonged and rounded toothless upper jaw
billfish: elongate European surface-dwelling predacious fishes with long toothed jaws; abundant in coastal waters
billy: male goat
biped: an animal with two feet
biplane flying fish: having both pectoral and pelvic fins enlarged
bird: warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings
bird dog: a gun dog trained to locate or retrieve birds
bird louse: wingless insect with mouth parts adapted for biting; mostly parasitic on birds
bird of Jove: any of various large keen-sighted diurnal birds of prey noted for their broad wings and strong soaring flight
bird of Juno: very large terrestrial southeast Asian pheasant often raised as an ornamental bird
bird of Minerva: nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes
bird of paradise: any of numerous brilliantly colored plumed birds of the New Guinea area
bird of passage: any bird that migrates seasonally
bird of prey: any of numerous carnivorous birds that hunt and kill other animals
bird-footed dinosaur: any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs
bison: any of several large humped bovids having shaggy manes and large heads and short horns
Bison bonasus: European bison having a smaller and higher head than the North American bison
bitch: female of any member of the dog family
biting midge: minute two-winged insect that sucks the blood of mammals and birds and other insects
Bitis arietans: large African viper that inflates its body when alarmed
Bitis gabonica: large heavy-bodied brilliantly marked and extremely venomous west African viper
bittern: relatively small compact tawny-brown heron with nocturnal habits and a booming cry; found in marshes
bivalve: marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together
black bass: widely distributed and highly prized American freshwater game fishes (sunfish family)
black carpet beetle: a carpet beetle that is solid black in color
black cock: male black grouse
black fly: small blackish stout-bodied biting fly having aquatic larvae; sucks the blood of birds as well as humans and other mammals
black fox: red fox in the color phase when its pelt is mostly black
black grouse: grouse of which the male is bluish-black
black sheep: sheep with a black coat
black squirrel: fox squirrel or grey squirrel in the black color phase
black-and-tan coonhound: American breed of large powerful hound dogs used for hunting raccoons and other game
black-headed snake: small secretive ground-living snake; found from central United States to Argentina
Blackburnian warbler: black-and-white North American wood warbler having an orange-and-black head and throat
blackfish: female salmon that has recently spawned
bladder worm: encysted saclike larva of the tapeworm
blanquillo: important marine food fishes
Blarina brevicauda: North American shrew with tail less than half its body length
blastocyst: the blastula of a placental mammal in which some differentiation of cells has occurred
blastosphere: early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
Blatta orientalis: dark brown cockroach originally from orient now nearly cosmopolitan in distribution
Blattella germanica: small light-brown cockroach brought to United States from Europe; a common household pest
Blenheim spaniel: red-and-white variety of English toy spaniel
blennioid: elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins
Blennius pholis: European scaleless blenny
blenny: small usually scaleless fishes with comb-like teeth living about rocky shores; are territorial and live in holes between rocks
blind snake: wormlike burrowing snake of warm regions having vestigial eyes
blindworm: any of the small slender limbless burrowing wormlike amphibians of the order Gymnophiona; inhabit moist soil in tropical regions
Blissus leucopterus: small black-and-white insect that feeds on cereal grasses
blister beetle: beetle that produces a secretion that blisters the skin
blood clam: red-blooded clam
blood fluke: flatworms parasitic in the blood vessels of mammals
bloodhound: a breed of large powerful hound of European origin having very acute smell and used in tracking
bloodsucker: carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end
bloodworm: a segmented marine worm with bright red body; often used for bait
blow fly: large usually hairy metallic blue or green fly; lays eggs in carrion or dung or wounds
blower: large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales; dolphins; porpoises; narwhals
blowfish: any of numerous marine fishes whose elongated spiny body can inflate itself with water or air to form a globe; several species contain a potent nerve poison; closely related to spiny puffers
blue: any of numerous small butterflies of the family Lycaenidae
blue cat: a large catfish of the Mississippi valley
blue fox: a variety of Arctic fox having a pale grey winter coat
blue point Siamese: Siamese cat having a bluish cream-colored body and dark grey points
blue point: small edible oyster typically from the southern shore of Long Island
bluebill: diving ducks of North America having a bluish-grey bill
bluebird: blue North American songbird
bluebird: fruit-eating mostly brilliant blue songbird of the East Indies
bluetick: a very fast American hound; white mottled with bluish grey
boa: any of several chiefly tropical constrictors with vestigial hind limbs
boar: an uncastrated male hog
boarfish: fish with large eyes and long snouts
boarhound: large hound used in hunting wild boars
boat bug: carnivorous aquatic bug having paddle-like hind legs
boatswain bird: mostly white web-footed tropical seabird often found far from land
bobwhite: a popular North American game bird; named for its call
bollworm: any of various moth caterpillars that destroy cotton bolls
bombardier beetle: beetle that ejects audibly a pungent vapor when disturbed
Bombina bombina: toad of central and eastern Europe having red or orange patches mixed with black on its underside
bombycid: moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk
Bombycilla cedrorun: widely distributed over temperate North America
Bombycilla garrulus: large waxwing of northern North America; similar to but larger than the cedar waxwing
Bombyx mori: stocky creamy-white Asiatic moth found almost entirely under human care; the source of most of the silk commerce
Bonasa umbellus: valued as a game bird in eastern United States and Canada
bone-headed dinosaur: bipedal herbivorous dinosaurs with bony crowns
bonito: any of various scombroid fishes intermediate in size and characteristics between mackerels and tunas
bonxie: gull-like jaeger of northern seas
bony fish: any fish of the class Osteichthyes
booby: small tropical gannet having a bright bill or bright feet or both
Border collie: developed in the area between Scotland and England usually having a black coat with white on the head and tip of tail used for herding both sheep and cattle
Border terrier: small rough-coated terrier of British origin
borer: any of various insects or larvae or mollusks that bore into wood
Bos banteng: wild ox of the Malay Archipelago
Bos grunniens: large long-haired wild ox of Tibet often domesticated
Bos indicus: any of several breeds of Indian cattle; especially a large American heat and tick resistant greyish humped breed evolved in the Gulf States by interbreeding Indian cattle and now used chiefly for crossbreeding
Bos primigenius: large recently extinct long-horned European wild ox; considered one of the ancestors of domestic cattle
Bos taurus: domesticated bovine animals as a group regardless of sex or age
Boselaphus tragocamelus: large Indian antelope; male is blue-grey with white markings; female is brownish with no horns
Boskop man: possible early Homo sapiens represented by a cranium found in the Transvaal; formerly considered a separate species
Boston terrier: small pug-faced American terrier breed having a smooth brindle or black coat with white markings
bot: botfly larva; typically develops inside the body of a horse or sheep or human
Botaurus lentiginosus: a kind of bittern
Botaurus stellaris: a kind of bittern
botfly: stout-bodied hairy dipterous fly whose larvae are parasites on humans and other mammals
Bothrops atrops: large extremely venomous pit viper of Central America and South America
bottlenose: any of several dolphins with rounded forehead and well-developed beak; chiefly of northern Atlantic and Mediterranean
bottom fish: fish that live on the sea bottom (particularly the commercially important gadoid fish like cod and haddock, or flatfish like flounder)
bottom lurkers: a fish that lurks on the bottom of a body of water
bottom-dweller: a fish that lives and feeds on the bottom of a body of water
bottom-feeder: a scavenger that feeds low on the food chain
Bouviers des Flandres: rough-coated breed used originally in Belgium for herding and guarding cattle
bovid: hollow-horned ruminants
bovine: any of various members of the genus Bos
bowerbird: any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females
box tortoise: chiefly terrestrial turtle of North America; shell can be closed tightly
boxer: a breed of stocky medium-sized short-haired dog with a brindled coat and square-jawed muzzle developed in Germany
boxfish: any of numerous small tropical fishes having body and head encased in bony plates
Brabancon griffon: a variety of Brussels griffon having a short smooth coat
brachiopod: marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide
brachyuran: typical crabs
bracketed blenny: small eellike fishes common in shallow waters of the northern Atlantic
Bradypus tridactylus: a sloth that has three long claws on each forefoot and each hindfoot
brain coral: massive reef-building coral having a convoluted and furrowed surface
Brama raii: deep-bodied sooty-black pelagic spiny-finned fish of the northern Atlantic and northern Pacific; valued for food
branchiopod: aquatic crustaceans typically having a carapace and many pairs of leaflike appendages used for swimming as well as respiration and feeding
brant: small dark geese that breed in the north and migrate southward
Branta bernicla: the best known variety of brant goose
Branta canadensis: common greyish-brown wild goose of North America with a loud, trumpeting call
Branta leucopsis: European goose smaller than the brant; breeds in the far north
Brazilian trumpeter: trumpeter of Brazil and Guiana; often kept to protect poultry in Brazil
bream: any of various usually edible freshwater percoid fishes having compressed bodies and shiny scales; especially (but not exclusively) of the genus Lepomis
bream: any of numerous marine percoid fishes especially (but not exclusively) of the family Sparidae
Brevoortia tyrannis: shad-like North American marine fishes used for fish meal and oil and fertilizer
briard: old French breed of large strong usually black dogs having a long tail and long wavy and slightly stiff coat
bristletail: small wingless insect with a long bristlelike tail
brit: the young of a herring or sprat or similar fish
brit: minute crustaceans forming food for right whales
Brittany spaniel: tall active short-tailed French breed of bird dog having a usually smooth orange- or liver-and-white coat
brittle star: an animal resembling a starfish with fragile whiplike arms radiating from a small central disc
broadbill: small birds of the Old World tropics having bright plumage and short wide bills
broadtail: hardy coarse-haired sheep of central Asia; lambs are valued for their soft curly black fur
brocket: male red deer in its second year
brocket: small South American deer with unbranched antlers
bronc: an unbroken or imperfectly broken mustang
brood bitch: a bitch used for breeding
brood hen: a domestic hen ready to brood
broodmare: a female horse used for breeding
Brosme brosme: large edible marine fish of northern coastal waters; related to cod
brotula: deep-sea fishes
brown bat: any of numerous medium to small insectivorous bats found worldwide in caves and trees and buildings
brown bullhead: freshwater catfish of eastern United States
brown lacewing: small dark-colored lacewing fly
Brown Swiss: large hardy brown breed of dairy cattle from Switzerland
Bruchus pisorum: larvae live in and feed on seeds of the pea plant
bruin: a conventional name for a bear used in tales following usage in the old epic `Reynard the Fox'
brush kangaroo: any of various small or medium-sized kangaroos; often brightly colored
brush-footed butterfly: medium to large butterflies found worldwide typically having brightly colored wings and much-reduced nonfunctional forelegs carried folded on the breast
brush-tail porcupine: porcupine with a tuft of large beaded bristles on the tail
Brussels griffon: breed of various very small compact wiry-coated dogs of Belgian origin having a short bearded muzzle
bryozoan: sessile aquatic animal forming mossy colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by budding
Bubalus bubalis: an Asian buffalo that is often domesticated for use as a draft animal
Bubalus mindorensis: small buffalo of Mindoro in the Philippines
bubble shell: marine gastropod mollusk having a very small thin shell
Bubo virginianus: brown North American horned owl
Bubulcus ibis: small white egret widely distributed in warm regions often found around grazing animals
Bucephala islandica: North American goldeneye diving duck
Bucephela albeola: small North American diving duck; males have bushy head plumage
Bucephela clangula: large-headed swift-flying diving duck of Arctic regions
buck: mature male of various mammals (especially deer or antelope)
bucking bronco: a wild horse that is vicious and difficult or impossible to break in
buckskin: horse of a light yellowish dun color with dark mane and tail
Budorcas taxicolor: large heavily built goat antelope of eastern Himalayan area
buffalo fish: any of several large suckers of the Mississippi valley
bufo: any toad of the genus Bufo
Bufo americanus: common toad of America
Bufo boreas: of a great variety of habitats from southern Alaska to Baja California west of the Rockies
Bufo calamita: common brownish-yellow short-legged toad of western Europe; runs rather than hops
Bufo marinus: largest known toad species; native to Central America; valuable destroyer of insect pests
Bufo microscaphus: a uniformly warty stocky toad of washes and streams of semiarid southwestern United States
Bufo speciosus: nocturnal burrowing toad of mesquite woodland and prairies of the United States southwest
bug: general term for any insect or similar creeping or crawling invertebrate
bug: insects with sucking mouthparts and forewings thickened and leathery at the base; usually show incomplete metamorphosis
bulbul: nightingale spoken of in Persian poetry
bull: mature male of various mammals of which the female is called `cow'; e.g. whales or elephants or especially cattle
bull: uncastrated adult male of domestic cattle
bull mastiff: large powerful breed developed by crossing the bulldog and the mastiff
bull snake: any of several large harmless rodent-eating North American burrowing snakes
bull terrier: a powerful short-haired terrier originated in England by crossing the bulldog with terriers
bullbat: mainly nocturnal North American goatsucker
bulldog ant: any of the large fierce Australian ants of the genus Myrmecia
bullhead: freshwater sculpin with a large flattened bony-plated head with hornlike spines
bullhead: any of several common freshwater catfishes of the United States
bullock: young bull
bullock: castrated bull
bumblebee: robust hairy social bee of temperate regions
Bungarus fasciatus: sluggish krait banded with black and yellow
bunny: (usually informal) especially a young rabbit
bunting: any of numerous seed-eating songbirds of Europe or North America
Burchell's zebra: of the plains of central and eastern Africa
Burhinus oedicnemus: large-headed large-eyed crepuscular or nocturnal shorebird of the Old World and tropical America having a thickened knee joint
Burmeisteria retusa: of southern South America
Burmese cat: a short-haired breed with body similar to the Siamese cat but having a solid dark brown or grey coat
burrfish: any of several fishes having rigid flattened spines
burro: small donkey used as a pack animal
bush baby: agile long-tailed nocturnal African lemur with dense woolly fur and large eyes and ears
bush shrike: an African shrike
bush tit: active grey titmice of western North America
bustard: large heavy-bodied chiefly terrestrial game bird capable of powerful swift flight; classified with wading birds but frequents grassy steppes
bustard quail: small quail-like terrestrial bird of southern Eurasia and northern Africa that lacks a hind toe; classified with wading birds but inhabits grassy plains
butcherbird: shrikes that impale their prey on thorns
butcherbird: large carnivorous Australian bird with the shrike-like habit of impaling prey on thorns
Buteo buteo: the common European short-winged hawk
Buteo jamaicensis: dark brown American hawk species having a reddish-brown tail
Buteo lagopus: large hawk of the northern hemisphere that feeds chiefly on small rodents and is beneficial to farmers
Buteo lineatus: North American hawk with reddish brown shoulders
buteonine: any hawk of the genus Buteo
butterfish: small marine fish with a short compressed body and feeble spines
butterfly: diurnal insect typically having a slender body with knobbed antennae and broad colorful wings
butterfly fish: small usually brilliantly colored tropical marine fishes having narrow deep bodies with large broad fins; found worldwide
butterfly ray: a stingray with a short tail and a broad fin
butterflyfish: tropical fish with huge fanlike pectoral fins for underwater gliding; unrelated to searobins
bycatch: unwanted marine creatures that are caught in the nets while fishing for another species
Cabassous unicinctus: naked-tailed armadillo of tropical South America
cabbage butterfly: white butterfly whose larvae (cabbageworms) feed on cabbage
cacique: black-and-red or black-and-yellow orioles of the American tropics
cackler: a hen that has just laid an egg and emits a shrill squawk
cactus wren: large harsh-voiced American wren of arid regions of the United States southwest and Mexico
caddice fly: small moth-like insect having two pairs of hairy membranous wings and aquatic larvae
caddisworm: larva of the caddis fly; constructs a case of silk covered with sand or plant debris
Cadra cautella: a moth whose larvae feed on and mat together with webbing various stored products of vegetable origin
Cadra figulilella: moth whose larvae attack dried fruits and cereal products
caiman lizard: crocodile-like lizard of South America having powerful jaws for crushing snails and mussels
Caiman sclerops: caiman with bony ridges about the eyes; found from southern Mexico to Argentina
caiman: a semiaquatic reptile of Central and South America that resembles an alligator but has a more heavily armored belly
Cairina moschata: large crested wild duck of Central America and South America; widely domesticated
cairn: small rough-haired breed of terrier from Scotland
Calamus penna: from Florida and Bahamas to Brazil
calf: young of domestic cattle
calf: young of various large placental mammals e.g. whale or giraffe or elephant or buffalo
calico cat: a cat having black and cream-colored and yellowish markings
Calidris canutus: a sandpiper that breeds in the Arctic and winters in the southern hemisphere
Calidris Ferruginea: Old World sandpiper with a curved bill like a curlew
Calidris melanotos: American sandpiper that inflates its chest when courting
California newt: newt that is similar to Taricha granulosa in characteristics and habitat
Callimorpha jacobeae: large red-and-black European moth; larvae feed on leaves of ragwort; introduced into United States to control ragwort
Callinectes sapidus: bluish edible crab of Atlantic and Gulf Coasts of North America
Calliphora vicina: blowfly with iridescent blue body; makes a loud buzzing noise in flight
Callisaurus draconoides: swift lizard with long black-banded tail and long legs; of deserts of United States and Mexico
Callorhinus ursinus: of Pacific coast from Alaska southward to California
calosoma: any beetle of the genus Calosoma
Calosoma scrutator: large metallic blue-green beetle that preys on caterpillars; found in North America
camel: cud-chewing mammal used as a draft or saddle animal in desert regions
Camelus bactrianus: two-humped camel of the cold deserts of central Asia
Camelus dromedarius: one-humped camel of the hot deserts of northern Africa and southwestern Asia
Campephilus principalis: large black-and-white woodpecker of southern United States and Cuba having an ivory bill; nearly extinct
Canachites canadensis: North American grouse that feeds on evergreen buds and needles
canary: any of several small Old World finches
Cancer borealis: large red deep-water crab of the eastern coast of North America
Cancer irroratus: crab of eastern coast of North America
Cancer magister: small edible crab of Pacific coast of North America
canid: any of various fissiped mammals with nonretractile claws and typically long muzzles
Canis aureus: Old World nocturnal canine mammal closely related to the dog; smaller than a wolf; sometimes hunts in a pack but usually singly or as a member of a pair
Canis dingo: wolflike yellowish-brown wild dog of Australia
Canis familiaris: a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds
Canis latrans: small wolf native to western North America
Canis lupus: a wolf with a brindled grey coat living in forested northern regions of North America
Canis lupus tundrarum: wolf of Arctic North America having white fur and a black-tipped tail
Canis rufus: reddish-grey wolf of southwestern North America
cankerworm: green caterpillar of a geometrid moth; pest of various fruit and shade trees
capelan: very small northern fish; forage for sea birds and marine mammals and other fishes
capon: castrated male chicken
Capra aegagrus: wild goat of Iran and adjacent regions
Capra falconeri: large Himalayan goat with large spiraled horns
Capra hircus: any of various breeds of goat raised for milk or meat or wool
Capra ibex: wild goat of mountain areas of Eurasia and northern Africa having large recurved horns
Capreolus capreolus: small graceful deer of Eurasian woodlands having small forked antlers
caprimulgid: mainly crepuscular or nocturnal nonpasserine birds with mottled greyish-brown plumage and large eyes; feed on insects
caprimulgiform bird: long-winged nonpasserine birds
Caprimulgus carolinensis: large whippoorwill-like bird of the southern United States
Caprimulgus europaeus: Old World goatsucker
Caprimulgus vociferus: American nocturnal goatsucker with grey-and-white plumage
caprine animal: any of numerous agile ruminants related to sheep but having a beard and straight horns
Capros aper: fish with a projecting snout
capsid: a variety of leaf bug
captive: an animal that is confined
carabao: water buffalo of the Philippines
carabid beetle: predacious shining black or metallic terrestrial beetle that destroys many injurious insects
caracara: any of various long-legged carrion-eating hawks of South America and Central America
carangid: a percoid fish of the family Carangidae
Caranx bartholomaei: fish of western Atlantic and Gulf of Mexico
Caranx crysos: fish of western Atlantic: Cape Cod to Brazil
Caranx hippos: fish of western Atlantic and Gulf of Mexico
Carassius auratus: small golden or orange-red freshwater fishes of Eurasia used as pond or aquarium fishes
Carassius carassius: European carp closely resembling wild goldfish
Carcharhinus leucas: a most common shark in temperate and tropical coastal waters worldwide; heavy-bodied and dangerous
Carcharhinus limbatus: widely distributed shallow-water shark with fins seemingly dipped in ink
Carcharhinus obscurus: relatively slender blue-grey shark; nearly worldwide in tropical and temperate waters
Carcharhinus plumbeus: most common grey shark along coasts of middle Atlantic states; sluggish and occasionally caught by fishermen
Carcharinus longimanus: large deep-water shark with white-tipped dorsal fin; worldwide distribution; most dangerous shark
Carcharodon carcharias: large aggressive shark widespread in warm seas; known to attack humans
Cardigan Welsh corgi: slightly bowlegged variety of corgi having rounded ears and a long tail
cardinalfish: small red fishes of coral reefs and inshore tropical waters
Cardium edule: common edible European cockle
Carduelis cannabina: small Old World finch whose male has a red breast and forehead
Carduelis carduelis: small European finch having a crimson face and yellow-and-black wings
Carduelis cucullata: South American species of scarlet finch with black head and wings and tail
Carduelis flammea: small siskin-like finch with a red crown and a rosy breast and rump
Carduelis hornemanni: small siskin-like finch with a red crown
Carduelis spinus: small yellow-and-black Eurasian finch with a sharp beak
Caretta caretta: very large carnivorous sea turtle; wide-ranging in warm open seas
Cariama cristata: Brazilian Cariama; sole representative of the genus Cariama
caribe: small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals
carinate: birds having keeled breastbones for attachment of flight muscles
Carniolan bee: greyish highly productive European honeybee that has a quiet disposition
carnivore: any animal that feeds on flesh
carnivore: a terrestrial or aquatic flesh-eating mammal
carnivorous bat: typically having large ears and feeding primarily on insects; worldwide in distribution
carnosaur: large carnivorous bipedal dinosaur having huge claws
carp: any of various freshwater fish of the family Cyprinidae
carpenter ant: ant that nests in decaying wood in which it bores tunnels for depositing eggs
carpenter bee: large solitary bee that lays eggs in tunnels bored into wood or plant stems
carpet beetle: small beetle whose larvae are household pests feeding on woolen fabrics
Carphophis amoenus: small reddish wormlike snake of eastern United States
Carpocapsa pomonella: a small grey moth whose larvae live in apples and English walnuts
Carpodacus mexicanus: small finch originally of the western United States and Mexico
Carpodacus purpureus: North American finch having a raspberry-red head and breast and rump
carriage dog: a large breed having a smooth white coat with black or brown spots; originated in Dalmatia
carrier pigeon: a homing pigeon used to carry messages
cart horse: draft horse kept for pulling carts
cartilaginous fish: fishes in which the skeleton may be calcified but not ossified
caseworm: insect larva that constructs a protective case around its body
Cashmere goat: Himalayan goat having a silky undercoat highly prized as cashmere wool
Casmerodius albus: widely distributed Old World white egret
cassowary: large black flightless bird of Australia and New Guinea having a horny head crest
Castor canadensis: a variety of beaver found in almost all areas of North America except Florida
cat shark: small bottom-dwelling sharks with cat-like eyes; found along continental slopes
cat: feline mammal usually having thick soft fur and no ability to roar: domestic cats; wildcats
catamount: short-tailed wildcats with usually tufted ears; valued for their fur
caterpillar: a wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth
catfish: any of numerous mostly freshwater bottom-living fishes of Eurasia and North America with barbels like whiskers around the mouth
catfish: large ferocious northern deep-sea food fishes with strong teeth and no pelvic fins
Catharacta skua: large brown skua of the northern Atlantic
Cathartes aura: a New World vulture that is common in South America and Central America and the southern United States
Catocala nupta: moth having dull forewings and red-marked hind wings
Catoptrophorus semipalmatus: large North American shorebird of eastern and Gulf Coasts
catostomid: a cypriniform fish of the family Catostomidae
caudate: amphibians that resemble lizards
cavalry horse: horse trained for battle
Cavia cobaya: stout-bodied nearly tailless domesticated cavy; often kept as a pet and widely used in research
Cavia porcellus: South American cavy; possibly ancestral to the domestic guinea pig
cavy: short-tailed rough-haired South American rodent
Cebuella pygmaea: the smallest monkey; of tropical forests of the Amazon
Cebus capucinus: monkey of Central America and South America having thick hair on the head that resembles a monk's cowl
centipede: chiefly nocturnal predacious arthropod having a flattened body of 15 to 173 segments each with a pair of legs, the foremost pair being modified as prehensors
centrarchid: small carnivorous freshwater percoid fishes of North America usually having a laterally compressed body and metallic luster: crappies; black bass; bluegills; pumpkinseed
Centrocercus urophasianus: large grouse of sagebrush regions of North America
Centropistes striata: bluish black-striped sea bass of the Atlantic coast of the United States
Centropristis philadelphica: a kind of sea bass
Centropus phasianinus: Australian bird with a tail like a pheasant
Centropus sinensis: common coucal of India and China
cephalaspid: extinct jawless fish of the Devonian with armored head
cephalochordate: fish-like animals having a notochord rather than a true spinal column
cephalopod: marine mollusk characterized by well-developed head and eyes and sucker-bearing tentacles
Cephalopterus ornatus: black tropical American bird having a large overhanging crest and long feathered wattle
Cepphus columba: northern Pacific guillemot
Cepphus grylle: northern Atlantic guillemot
Cerapteryx graminis: European moth with white antler-like markings on the forewings; the larvae damage pastures and grasslands
Cerastes cornutus: highly venomous viper of northern Africa and southwestern Asia having a horny spine above each eye
ceratodus: extinct lungfish
ceratopsian: any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia
ceratosaur: primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America
Ceratotherium simum: large light-grey African rhinoceros having two horns; endangered; sometimes placed in genus Diceros
cercaria: tadpole-shaped parasitic larva of a trematode worm; tail disappears in adult stage
Cercopithecus aethiops: white and olive green East African monkey with long white tufts of hair beside the face
Cercopithecus aethiops pygerythrus: South African monkey with black face and hands
Cercopithecus aethiops sabaeus: common savannah monkey with greenish-grey back and yellow tail
Cercopithecus talapoin: smallest guenon monkey; of swampy central and west African forests
Certhia americana: a common creeper in North America with a down-curved bill
Certhia familiaris: common European brown-and-buff tree creeper with down-curved bill
cervid: distinguished from Bovidae by the male's having solid deciduous antlers
Cervus elaphus: common deer of temperate Europe and Asia
Cervus elaphus canadensis: large North American deer with large much-branched antlers in the male
Cervus unicolor: a deer of southern Asia with antlers that have three tines
Ceryle alcyon: greyish-blue North American kingfisher with a chestnut band on its chest
cestode: ribbonlike flatworms that are parasitic in the intestines of humans and other vertebrates
Cetonia aurata: a common metallic green European beetle: larvae feed on plant roots and adults on leaves and flowers of e.g. roses
Cetorhinus maximus: large harmless plankton-eating northern shark; often swims slowly or floats at the sea surface
chachalaca: slender arboreal guan resembling a wild turkey; native to Central America and Mexico; highly regarded as game birds
Chaenopsis ocellata: found from Florida to Cuba
Chaetodipterus faber: deep-bodied disk-shaped food fish of warmer western Atlantic coastal waters
chaetodon: any fish of the genus Chaetodon
chalcid: any of various tiny insects whose larvae are parasites on eggs and larvae of other insects; many are beneficial in destroying injurious insects
chalcis fly: a variety of chalcid fly
Chamaea fasciata: small brown bird of California resembling a wren
Chamaeleo chamaeleon: a chameleon found in Africa
Chamaeleo oweni: a kind of chameleon
chamaeleon: lizard of Africa and Madagascar able to change skin color and having a projectile tongue
chambered nautilus: cephalopod of the Indian and Pacific oceans having a spiral shell with pale pearly partitions
chameleon tree frog: a form of tree toad
char: any of several small trout-like fish of the genus Salvelinus
characid: any freshwater fish of the family Characinidae
Charadrius melodus: small plover of eastern North America
Charadrius morinellus: rare plover of upland areas of Eurasia
Charadrius vociferus: American plover of inland waters and fields having a distinctive cry
charger: formerly a strong swift horse ridden into battle
Charina bottae: boa of grasslands and woodlands of western North America; looks and feels like rubber with tail and head of similar shape
Charolais: large white or cream-colored breed from France
Charronia flavigula: large yellow and black marten of southern China and Burma
Chateura pelagica: American swift that nests in e.g. unused chimneys
chatterer: passerine bird of New World tropics
Chauna torquata: largest crested screamer; native to southern Brazil and Argentina
Chelifer cancroides: minute arachnid sometimes found in old papers
Chelonia mydas: large tropical turtle with greenish flesh used for turtle soup
chelonian: a reptile of the order Chelonia
Chelydra serpentina: large-headed turtle with powerful hooked jaws found in or near water; prone to bite
Chen caerulescens: North American wild goose having dark plumage in summer but white in winter
cherrystone: a half-grown quahog
Chesapeake Bay retriever: American breed having a short thick oily coat ranging from brown to light tan
chestnut: a dark golden-brown or reddish-brown horse
Cheviot: hardy hornless sheep of the Cheviot Hills noted for its short thick wool
chevrotain: very small hornless deer-like ruminant of tropical Asia and west Africa
Chiacoan peccary: a recently discovered large wild pig of Paraguay
chickadee: any of various small grey-and-black songbirds of North America
chicken hawk: nontechnical term for any hawks said to prey on poultry
chicken snake: large North American snake
chigger: larval mite that sucks the blood of vertebrates including human beings causing intense irritation
Chihuahua: an old breed of tiny short-haired dog with protruding eyes from Mexico held to antedate Aztec civilization
Chihuahuan spotted whiptail: having longitudinal stripes overlaid with light spots; upland lizard of United States southwest and Mexico
Chilomeniscus cinctus: a sand snake of southwestern United States; lives in fine to coarse sand or loamy soil in which it `swims'; banding resembles that of coral snakes
chimaera: a deep-sea fish with a tapering body, smooth skin, and long threadlike tail
Chimaera monstrosa: large European chimaera
Chinchilla laniger: small rodent with soft pearly grey fur; native to the Andes but bred in captivity for fur
Chinese paddlefish: fish of larger rivers of China similar to the Mississippi paddlefish
chipmunk: a burrowing ground squirrel of western America and Asia; has cheek pouches and a light and dark stripe running down the body
chiton: primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates
Chlamydera nuchalis: large bowerbird of northern Australia
Chlamydosaurus kingi: large arboreal insectivorous Australian lizard with a ruff of skin around the neck
Chlamyphorus truncatus: very small Argentine armadillo with pale silky hair and pink plates on head and neck
Chlorophoneus nigrifrons: a kind of bush shrike
Chlorura chlorura: towhee of the Rocky Mountains
Choeronycteris mexicana: small-eared Mexican bat with a long slender nose
Choloepus didactylus: relatively small fast-moving sloth with two long claws on each front foot
Choloepus hoffmanni: a sloth of Central America that has two long claws on each forefoot and three long claws on each hindfoot
chordate: any animal of the phylum Chordata having a notochord or spinal column
Choriotis australis: popular Australian game bird
Chorizagrotis auxiliaris: larvae (of a noctuid moth) that travel in large groups and destroy grains and alfalfa in the midwestern states
chorus frog: any of several small North American frogs having a loud call
chough: a European corvine bird of small or medium size with red legs and glossy black plumage
chow: breed of medium-sized dogs with a thick coat and fluffy curled tails and distinctive blue-black tongues; believed to have originated in northern China
Chronoperates paradoxus: shrew-sized protomammal from the Alberta region of Canada; from about 55 million years ago (much more recent than other mammal-like reptiles)
chrysalis: pupa of a moth or butterfly enclosed in a cocoon
Chrysaora quinquecirrha: a type of jellyfish
Chrysemys picta: freshwater turtles having bright yellow and red markings; common in the eastern United States
Chrysolophus pictus: brightly colored crested pheasant of mountains of western and central Asia
chrysomelid: brightly colored beetle that feeds on plant leaves; larvae infest roots and stems
Chrysophrys auratus: Australian food fish having a pinkish body with blue spots
Chrysophrys australis: important dark-colored edible food and game fish of Australia
chrysopid: pale green unpleasant-smelling lacewing fly having carnivorous larvae
Chunga burmeisteri: Argentinian Cariama
church mouse: a fictional mouse created by Lewis Carroll
cicada: stout-bodied insect with large membranous wings; male has drum-like organs for producing a high-pitched drone
cichlid: freshwater fishes of tropical America and Africa and Asia similar to American sunfishes; some are food fishes; many small ones are popular in aquariums
Ciconia ciconia: the common stork of Europe; white with black wing feathers and a red bill
Ciconia nigra: Old World stork that is glossy black above and white below
Cimex lectularius: bug of temperate regions that infests especially beds and feeds on human blood
cinnamon bear: reddish-brown color phase of the American black bear
Circus Aeruginosus: Old World harrier frequenting marshy regions
Circus cyaneus: common harrier of North America and Europe; nests in marshes and open land
Cistothorus palustris: American wren that inhabits tall reed beds
Cistothorus platensis: small American wren inhabiting wet sedgy meadows
Citation: thoroughbred that won the triple crown in 1948
Citellus citellus: rather large central Eurasian ground squirrel
Citellus lateralis: common black-striped reddish-brown ground squirrel of western North America; resembles a large chipmunk
Citellus leucurus: small ground squirrel of western United States
Citellus variegatus: large grey ground squirrel of rocky areas of the southwestern United States
Citharichthys cornutus: a whiff found in waters from the Bahamas and northern Gulf of Mexico to Brazil
civet: cat-like mammal typically secreting musk used in perfumes
Cladorhyncus leucocephalum: web-footed Australian stilt with reddish-brown pectoral markings
clam: burrowing marine mollusk living on sand or mud; the shell closes with viselike firmness
Clangula hyemalis: a common long-tailed sea duck of the northern parts of the United States
class Merostomata: used in some classifications; includes the orders Xiphosura and Eurypterida
cleg: large swift fly the female of which sucks blood of various animals
clerid: predacious on other insects; usually brightly colored or metallic
click beetle: able to right itself when on its back by flipping into the air with a clicking sound
climbing salamander: any of several North American salamanders adapted for climbing with well-developed limbs and long somewhat squared-off toes
clingfish: very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.
clinid: mostly small blennioid fishes of coral reefs and seagrass beds
clothes moth: any of several small yellowish or buff-colored moths whose larvae eat organic matter e.g. woolens
clumber: a thickset spaniel with longish silky hair
Clupea harangus: commercially important food fish of northern waters of both Atlantic and Pacific
Clupea harengus harengus: important food fish; found in enormous shoals in the northern Atlantic
Clupea harengus pallasii: important food fish of the northern Pacific
Clupea sprattus: small herring processed like a sardine
clupeid: any of numerous soft-finned schooling food fishes of shallow waters of northern seas
Clydesdale: heavy feathered-legged breed of draft horse originally from Scotland
Clydesdale terrier: selectively bred small Skye terrier with erect ears and a long silky coat
Cnemidophorus sexlineatus: very swift lizard of eastern and central United States
Cnemidophorus tesselatus: markings are darker and more marked than in western whiptail; from southeastern Colorado to eastern Chihuahua
Cnemidophorus tigris: active lizard having a network of dusky dark markings; of semiarid areas from Oregon and Idaho to Baja California
Cnemidophorus velox: having distinct longitudinal stripes: of Colorado Plateau from Arizona to western Colorado
cnidarian: radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
coach horse: strong draft horse for drawing coaches
coastal diving bird: gull family; skimmer family; jaeger family; auk family
cob: adult male swan
cob: stocky short-legged harness horse
cobra: venomous Asiatic and African elapid snakes that can expand the skin of the neck into a hood
coccid insect: scale insects and mealybugs
Coccothraustes coccothraustes: a common large finch of Eurasia
Coccus hesperidum: pest on citrus trees
Coccyzus erythropthalmus: North American cuckoo; builds a nest and rears its own young
cochin: Asian breed of large fowl with dense plumage and feathered legs
Cochlearius cochlearius: tropical American heron related to night herons
cock: adult male bird
cock: adult male chicken
cockatoo: white or light-colored crested parrot of the Australian region; often kept as cage birds
cockerel: a young domestic cock; not older than one year
cockle: common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs
cockroach: any of numerous chiefly nocturnal insects; some are domestic pests
cod: major food fish of Arctic and cold-temperate waters
codling: young codfish
coelophysis: one of the oldest known dinosaurs; late Triassic; cannibalistic
Colaptes auratus: large flicker of eastern North America with a red neck and yellow undersurface to wings and tail
Colaptes caper collaris: western United States bird with red undersurface to wings and tail
Colaptes chrysoides: southwestern United States bird like the yellow-shafted flicker but lacking the red neck
Colinus virginianus: a favorite game bird of eastern and central United States
collared lizard: any of several robust long-tailed lizards with collars of two dark bands; of central and western United States and northern Mexico
collembolan: any of numerous minute wingless primitive insects possessing a special abdominal appendage that allows the characteristic nearly perpetual springing pattern; found in soil rich in organic debris or on the surface of snow or water
collie: a silky-coated sheepdog with a long ruff and long narrow head developed in Scotland
Collocalia inexpectata: swift of eastern Asia; produces the edible bird's nest
Colobus guereza: a colobus monkey with a reddish brown coat and white silky fringes down both sides of the body
colobus: arboreal monkey of western and central Africa with long silky fur and reduced thumbs
colt: a young male horse under the age of four
Coluber constrictor: blackish racer of the eastern United States that grows to six feet
Coluber constrictor flaviventris: bluish-green blacksnake found from Ohio to Texas
Coluber hippocrepis: slender fast-moving Eurasian snake
colubrid: mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes
colugo: arboreal nocturnal mammal of southeast Asia and the Philippines resembling a lemur and having a fold of skin on each side from neck to tail that is used for long gliding leaps
Columba fasciata: wild pigeon of western North America; often mistaken for the now extinct passenger pigeon
Columba livia: pale grey Eurasian pigeon having black-striped wings from which most domestic species are descended
Columba palumbus: Eurasian pigeon with white patches on wings and neck
columbiform bird: a cosmopolitan order of land birds having small heads and short legs with four unwebbed toes
comatulid: free-swimming stalkless crinoid with ten feathery arms; found on muddy sea bottoms
comb jelly: biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a comb
comb-footed spider: spider having a comb-like row of bristles on each hind foot
common American shad: shad of Atlantic coast of North America; naturalized to Pacific coast
common eel: eels that live in fresh water as adults but return to sea to spawn; found in Europe and America; marketed both fresh and smoked
common European earwig: sometimes destructive to cultivated bulbs
common European jay: fawn-colored jay with black-and-white crest and blue-and-black wings
compsognathus: very small bipedal carnivorous dinosaur of the late Jurassic in Bavaria
conceptus: an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
conch: any of various edible tropical marine gastropods of the genus Strombus having a brightly-colored spiral shell with large outer lip
condor: the largest flying birds in the western hemisphere
Condylura cristata: amphibious mole of eastern North America having pink fleshy tentacles around the nose
Conepatus leuconotus: large naked-muzzled skunk with white back and tail; of southwestern North America and Mexico
coney: any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes
coney: small short-eared burrowing mammal of rocky uplands of Asia and western North America
coney: any of various burrowing animals of the family Leporidae having long ears and short tails; some domesticated and raised for pets or food
conger: large dark-colored scaleless marine eel found in temperate and tropical coastal waters; some used for food
conodont: small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes
constrictor: any of various large nonvenomous snakes that kill their prey by crushing it in its coils
Constrictor constrictor: very large boa of tropical America and West Indies
Contopus sordidulus: small flycatcher of western North America
Contopus virens: small olive-colored woodland flycatchers of eastern North America
Conuropsis carolinensis: extinct parakeet whose range extended far into the United States
coondog: any dog trained to hunt raccoons
coonhound: any of several breeds of hound developed for hunting raccoons
coot: slate-black slow-flying birds somewhat resembling ducks
copepod: minute marine or freshwater crustaceans usually having six pairs of limbs on the thorax; some abundant in plankton and others parasitic on fish
copper: any of various small butterflies of the family Lycaenidae having coppery wings
Coracias garrulus: common European blue-and-green roller with a reddish-brown back
coraciiform bird: chiefly short-legged arboreal nonpasserine birds that nest in holes
Coragyps atratus: American vulture smaller than the turkey buzzard
coral: marine colonial polyp characterized by a calcareous skeleton; masses in a variety of shapes often forming reefs
Coregonus artedi: important food fish of cold deep lakes of North America
Coregonus clupeaformis: found in the Great Lakes and north to Alaska
coreid: a true bug
cornetfish: slender tropical fish with a long tubular snout and bony plates instead of scales
Cornish fowl: English breed of compact domestic fowl; raised primarily to crossbreed to produce roasters
corvine bird: birds of the crow family
Corvus brachyrhyncos: common crow of North America
Corvus corax: large black bird with a straight bill and long wedge-shaped tail
Corvus frugilegus: common gregarious Old World bird about the size and color of the American crow
Corvus monedula: common black-and-grey Eurasian bird noted for thievery
Corydalus cornutus: large soft-bodied insect having long slender mandibles in the male; aquatic larvae often used as bait
Coryphaena equisetis: a kind of dolphinfish
Coryphaena hippurus: the more common dolphinfish valued as food; about six feet long
corythosaur: duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet
coscoroba: large white South American bird intermediate in some respects between ducks and swans
Cosmocampus profundus: a fish 8 inches long; found from eastern Florida to western Caribbean
Cotswold: sheep with long wool originating in the Cotswold Hills
cotton stainer: a true bug: bug that damages and stains the lint of developing cotton
cotton strain: feeds primarily on cotton
cottontail: common small rabbit of North America having greyish or brownish fur and a tail with a white underside; a host for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)
Coturnix coturnix: the typical Old World quail
coucal: Old World ground-living cuckoo having a long dagger-like hind claw
Count Fleet: thoroughbred that won the triple crown in 1943
courser: swift-footed terrestrial plover-like bird of southern Asia and Africa; related to the pratincoles
courser: a dog trained for coursing
cow: mature female of mammals of which the male is called `bull'
cow pony: a light saddle horse trained for herding cattle
cow: female of domestic cattle:
cowbird: North American blackbird that follows cattle and lays eggs in other birds' nests
cowrie: any of numerous tropical marine gastropods of the genus Cypraea having highly polished usually brightly marked shells
coydog: offspring of a coyote and a dog
crab: decapod having eyes on short stalks and a broad flattened carapace with a small abdomen folded under the thorax and pincers
crab-eating opossum: South American opossum
crabeater seal: silvery grey Antarctic seal subsisting on crustaceans
crake: any of several short-billed Old World rails
crampfish: any sluggish bottom-dwelling ray of the order Torpediniformes having a rounded body and electric organs on each side of the head capable of emitting strong electric discharges
crane: large long-necked wading bird of marshes and plains in many parts of the world
crane fly: long-legged slender flies that resemble large mosquitoes but do not bite
craniate: animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
crappie: small sunfishes of central United States rivers
crawdad: small freshwater decapod crustacean that resembles a lobster
crawfish: large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters
creeper: any of various small insectivorous birds of the northern hemisphere that climb up a tree trunk supporting themselves on stiff tail feathers and their feet
creepy-crawly: an animal that creeps or crawls (such as worms or spiders or insects)
crested penguin: small penguin of the Falkland Islands and New Zealand
crested screamer: distinguished from the horned screamer by a feathery crest on the back of the head
crested swift: birds of southeast Asia and East Indies differing from true swifts in having upright crests and nesting in trees
Crex crex: common Eurasian rail that frequents grain fields
Cricetus cricetus: a variety of hamster common to Europe and Asia
cricket: leaping insect; male makes chirping noises by rubbing the forewings together
cricket frog: either of two frogs with a clicking call
crinoid: primitive echinoderms having five or more feathery arms radiating from a central disk
critter: a regional term for `creature' (especially for domestic animals)
Cro-magnon: extinct human of Upper Paleolithic in Europe
croaker: any of several fishes that make a croaking noise
Crocethia alba: small sandpiper that breeds in the Arctic and migrates southward along sandy coasts in most of world
crocodile: large voracious aquatic reptile having a long snout with massive jaws and sharp teeth and a body covered with bony plates; of sluggish tropical waters
crocodilian: extant archosaurian reptile
Crocodylus niloticus: a dangerous crocodile widely distributed in Africa
Crocodylus porosus: estuarine crocodile of eastern Asia and Pacific islands
Crocuta crocuta: African hyena noted for its distinctive howl
crossopterygian: any fish of the order Crossopterygii; most known only in fossil form
Crotalus adamanteus: large deadly rattlesnake with diamond-shaped markings
Crotalus cerastes: small pale-colored desert rattlesnake of southwestern United States; body moves in an s-shaped curve
Crotalus horridus atricaudatus: southern variety
Crotalus horridus horridus: widely distributed in rugged ground of eastern United States
Crotalus lepidus: mountain rock dweller of Mexico and most southern parts of United States southwest
Crotalus mitchellii: markings vary but usually harmonize with background; of southwestern Arizona and Baja California
Crotalus scutulatus: extremely dangerous; most common in areas of scattered scrubby growth; from Mojave Desert to western Texas and into Mexico
Crotalus tigris: having irregularly cross-banded back; of arid foothills and canyons of southern Arizona and Mexico
crow: black birds having a raucous call
crow blackbird: long-tailed American blackbird having iridescent black plumage
crowbait: an emaciated horse likely soon to become carrion and so attractive to crows
crucifix fish: sea catfish of the Caribbean area
crustacean: any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton
Cryptacanthodes maculatus: eellike Atlantic bottom fish with large almost vertical mouth
Cryptobranchus alleganiensis: large salamander of North American rivers and streams
Cryptoprocta ferox: largest carnivore of Madagascar; intermediate in some respects between cats and civets
Cryptotermes brevis: extremely destructive dry-wood termite of warm regions
Cryptotis parva: small brown shrew of grassy regions of eastern United States
Ctenocephalides canis: flea that attacks dogs and cats
Ctenocephalides felis: flea that breeds chiefly on cats and dogs and rats
cub: the young of certain carnivorous mammals such as the bear or wolf or lion
cuckoo: any of numerous European and North American birds having pointed wings and a long tail
cuckoo-bumblebee: a bee that is parasitic in the nests of bumblebees
cuculiform bird: birds having zygodactyl feet (except for the touracos)
Culex pipiens: common house mosquito
Culex quinquefasciatus: widespread tropical mosquito that transmits filarial worms
Cuniculus paca: large burrowing rodent of South America and Central America; highly esteemed as food
Cuon alpinus: fierce wild dog of the forests of central and southeast Asia that hunts in packs
cur: an inferior dog or one of mixed breed
curassow: large crested arboreal game bird of warm parts of the Americas having long legs and tails; highly esteemed as game and food
curlew: large migratory shorebirds of the sandpiper family; closely related to woodcocks but having a down-curved bill
curly-coated retriever: an English breed having a tightly curled black or liver-colored coat; retrieves game from land or water
Cursorius cursor: courser of desert and semidesert regions of the Old World
cuscus: woolly-haired monkey-like arboreal marsupial of New Guinea and northern Australia
cusk-eel: elongate compressed somewhat eel-shaped fishes
cutlassfish: long-bodied marine fishes having a long whiplike scaleless body and sharp teeth; closely related to snake mackerel
cuttle: ten-armed oval-bodied cephalopod with narrow fins as long as the body and a large calcareous internal shell
cutworm: North American moth whose larvae feed on young plant stems cutting them off at the ground
Cyanocitta cristata: common jay of eastern North America; bright blue with grey breast
Cyclopes didactylus: squirrel-sized South American toothless anteater with long silky golden fur
cyclops: minute free-swimming freshwater copepod having a large median eye and pear-shaped body and long antennae used in swimming; important in some food chains and as intermediate hosts of parasitic worms that affect man e.g. Guinea worms
Cyclopterus lumpus: clumsy soft thick-bodied northern Atlantic fish with pelvic fins fused into a sucker; edible roe used for caviar
cyclostome: primitive aquatic vertebrate
cygnet: a young swan
Cygnus atratus: large Australian swan having black plumage and a red bill
Cygnus buccinator: large pure white wild swan of western North America having a sonorous cry
Cygnus columbianus: swan that nests in tundra regions of the New and Old Worlds
Cygnus columbianus bewickii: Eurasian subspecies of tundra swan; smaller than the whooper
Cygnus columbianus columbianus: North American subspecies of tundra swan having a soft whistling note
Cygnus cygnus: common Old World swan noted for its whooping call
Cygnus olor: soundless Eurasian swan; commonly domesticated
cynipid gall wasp: small solitary wasp that produces galls on oaks and other plants
Cynocephalus variegatus: a variety of flying lemur
cynodont: small carnivorous reptiles
Cynomys gunnisoni: tail is white tipped
Cynomys ludovicianus: tail is black tipped
Cynopterus sphinx: a variety of fruit eating bat
Cynoscion nebulosus: weakfish of southern Atlantic and Gulf Coasts of United States
Cynoscion regalis: food and game fish of North American coastal waters with a mouth from which hooks easily tear out
Cypraea moneta: cowrie whose shell is used for money in parts of the southern Pacific and in parts of Africa
Cypraea tigris: cowrie whose shell is used for ornament
cyprinid: soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales
cypriniform fish: a soft-finned fish of the order Cypriniformes
cyprinodont: any member of the family Cyprinodontidae
Cyprinus carpio: large Old World freshwater bottom-feeding fish introduced into Europe from Asia; inhabits ponds and sluggish streams and often raised for food; introduced into United States where it has become a pest
Cystophora cristata: medium-sized blackish-grey seal with large inflatable sac on the head; of Arctic and northern Atlantic waters
dabbler: any of numerous shallow-water ducks that feed by upending and dabbling
Dacelo gigas: Australian kingfisher having a loud cackling cry
Dactylopius coccus: Mexican red scale insect that feeds on cacti; the source of a red dye
dairy cattle: cattle that are reared for their milk
dam: female parent of an animal especially domestic livestock
Dama dama: small Eurasian deer
Damaliscus lunatus: a large South African antelope; considered the swiftest hoofed mammal
Damaraland mole rat: colonial mole rat of western Africa; similar to naked mole rat
damselfish: small brilliantly colored tropical marine fishes of coral reefs
damselfly: slender non-stinging insect similar to but smaller than the dragonfly but having wings folded when at rest
danaid: large tropical butterfly with degenerate forelegs and an unpleasant taste
Danaus plexippus: large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed
Dandie Dinmont terrier: a breed of small terrier with long wiry coat and drooping ears
daphnia: minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae
dark horse: a racehorse about which little is known
darkling beetle: sluggish hard-bodied black terrestrial weevil whose larvae feed on e.g. decaying plant material or grain
darning needle: slender-bodied non-stinging insect having iridescent wings that are outspread at rest; adults and nymphs feed on mosquitoes etc.
darter: a person or other animal that moves abruptly and rapidly
Dasyatis centroura: one of the largest stingrays; found from Cape Cod to Cape Hatteras
Dasyprocta aguti: agile long-legged rabbit-sized rodent of Central America and South America and the West Indies; valued as food
Dasypus novemcinctus: having nine hinged bands of bony plates; ranges from Texas to Paraguay
dasyure: any of several more or less arboreal marsupials somewhat resembling martens
dasyurid: small carnivorous nocturnal marsupials of Australia and Tasmania
Dasyurus quoll: a variety of dasyure
Dasyurus viverrinus: carnivorous arboreal cat-like marsupials of Australia and Tasmania
Daubentonia madagascariensis: nocturnal lemur with long bony fingers and rodent-like incisor teeth closely related to the lemurs
dawn horse: earliest horse; extinct primitive dog-sized four-toed Eocene animal
dayfly: slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days
decapod: cephalopods having eight short tentacles plus two long ones
decapod: crustaceans characteristically having five pairs of locomotor appendages each joined to a segment of the thorax
Decapterus macarellus: small silvery fish; Nova Scotia to Brazil
Decapterus punctatus: small fusiform fish of western Atlantic
defoliator: an insect that strips the leaves from plants
deinocheirus: lightly built medium-sized theropod with long limbs and neck
deinonychus: swift agile wolf-sized bipedal dinosaur having a large curved claw on each hind foot; of the Cretaceous
Delichon urbica: common small European martin that builds nests under the eaves of houses
Delphinapterus leucas: small northern whale that is white when adult
Delphinus delphis: black-and-white dolphin that leaps high out of the water
Dendroaspis augusticeps: a highly venomous southern African mamba dreaded because of its quickness and readiness to bite
Dendroctonus rufipennis: small beetle that likes to bore through the bark of spruce trees and eat the cambium which eventually kills the tree
Dendroica auduboni: common warbler of western North America
Dendroica coronata: similar to Audubon's warbler
Dendroica petechia: yellow-throated American wood warbler
Dendroica striate: North American warbler having a black-and-white head
Dendroica tigrina: North American wood warbler; olive green and yellow striped with black
Denisonia superba: venomous but sluggish reddish-brown snake of Australia
Dermacentor variabilis: common tick that can transmit Rocky Mountain spotted fever and tularemia
Dermatobia hominis: large tropical American fly; parasitic on humans and other mammals
Dermochelys coriacea: wide-ranging marine turtle with flexible leathery carapace; largest living turtle
Desmodus rotundus: mouse-sized bat of tropical Central America and South America having sharp incisor and canine teeth; feeds on the blood of birds and mammals
devilfish: extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned
devilfish: bottom-living cephalopod having a soft oval body with eight long tentacles
Devon: red dual-purpose cattle of English origin
Dialeurodes citri: whitefly that attacks citrus trees
Diapheromera femorata: a variety of stick insect
diapsid: reptile having a pair of openings in the skull behind each eye
dibranch: cephalopods having two gills
dicamptodon: salamanders found near cold streams throughout the year
Diceros bicornis: African rhino; in danger of extinction
dickeybird: small bird; adults talking to children sometimes use these words to refer to small birds
dictyopterous insect: cockroaches and mantids
dicynodont: a kind of therapsid
Didelphis marsupialis: omnivorous opossum of the eastern United States; noted for feigning death when in danger; esteemed as food in some areas; considered same species as the crab-eating opossum of South America
digger wasp: solitary wasp that digs nests in the soil and stocks them with paralyzed insects for the larvae
digitigrade: an animal that walks so that only the toes touch the ground as e.g. dogs and cats and horses
dik-dik: any of several small antelopes of eastern Africa of the genus Madoqua; the size of a large rabbit
dimetrodon: carnivorous dinosaur of the Permian in North America having a crest or dorsal sail
dinoceras: a variety of dinocerate
dinocerate: an extinct ungulate
Dinornis giganteus: the largest moa; about 12 feet high
dinosaur: any of numerous extinct terrestrial reptiles of the Mesozoic era
Diodon holocanthus: similar to but smaller than porcupinefish
Diodon hystrix: spines become erect when the body is inflated; worldwide in warm waters
Diomedea exulans: very large albatross; white with wide black wings
Diomedea nigripes: a variety of albatross with black feet
Diphylla ecaudata: similar in size and habits to Desmodus rotundus; of tropical America including southern California and Texas
diplodocus: a huge quadrupedal herbivore with long neck and tail; of late Jurassic in western North America
Dipodomys phillipsii: any of various leaping rodents of desert regions of North America and Mexico; largest members of the family Heteromyidae
dipper: small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom
Dipsosaurus dorsalis: small long-tailed lizard of arid areas of southwestern United States and northwestern Mexico
dipteran: insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing
diver: large somewhat primitive fish-eating diving bird of the northern hemisphere having webbed feet placed far back; related to the grebes
diving duck: any of various ducks of especially bays and estuaries that dive for their food
diving petrel: any of several small diving birds of southern hemisphere seas; somewhat resemble auks
dobbin: a quiet plodding workhorse
Doberman pinscher: medium large breed of dog of German origin with a glossy black and tan coat; used as a watchdog
dobson: large brown aquatic larva of the dobsonfly; used as fishing bait
doe: mature female of mammals of which the male is called `buck'
dog-day cicada: its distinctive song is heard during July and August
dogfish: any of several small sharks
dogie: motherless calf in a range herd of cattle
Dolichonyx oryzivorus: migratory American songbird
Dolichotis patagonum: hare-like rodent of the pampas of Argentina
doliolum: free-swimming oceanic tunicate with a barrel-shaped transparent body
dolphin: any of various small toothed whales with a beaklike snout; larger than porpoises
dolphin: large slender food and game fish widely distributed in warm seas (especially around Hawaii)
domestic animal: any of various animals that have been tamed and made fit for a human environment
domestic fowl: a domesticated gallinaceous bird thought to be descended from the red jungle fowl
domestic pigeon: domesticated pigeon raised for sport or food
Dominique: American breed of chicken having barred grey plumage raised for meat and brown eggs
Donald Duck: a fictional duck created in animated film strips by Walt Disney
dorbeetle: Old World dung beetle that flies with a droning sound
Dorking: an English breed of large domestic fowl having five toes (the hind toe doubled)
dormouse: small furry-tailed squirrel-like Old World rodent that becomes torpid in cold weather
dory: marine fishes widely distributed in mid-waters and deep slope waters
dove: any of numerous small pigeons
dowitcher: shorebird of the sandpiper family that resembles a snipe
downy woodpecker: small North American woodpecker with black and white plumage and a small bill
Dracunculus medinensis: parasitic roundworm of India and Africa that lives in the abdomen or beneath the skin of humans and other vertebrates
draft animal: an animal used for pulling heavy loads
draft horse: horse adapted for drawing heavy loads
dragon: any of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the body
dragonet: small often brightly colored scaleless marine bottom-dwellers; found in tropical and warm temperate waters of Europe and America
drake: adult male of a wild or domestic duck
Dreissena polymorpha: inch long mollusk imported accidentally from Europe; clogs utility inlet pipes and feeds on edible freshwater mussels
driftfish: small (6 inches) tropical butterfishes found worldwide
driftfish: larger butterfishes of the western Atlantic from the New York area to the northern Gulf of Mexico
dromaeosaur: a kind of maniraptor
Dromaius novaehollandiae: large Australian flightless bird similar to the ostrich but smaller
drone: stingless male bee in a colony of social bees (especially honeybees) whose sole function is to mate with the queen
Drosophila melanogaster: small fruit fly used by Thomas Hunt Morgan in studying basic mechanisms of inheritance
drum: small to medium-sized bottom-dwelling food and game fishes of shallow coastal and fresh waters that make a drumming noise
dry-wood termite: any of various termites that live in and feed on dry wood that is not connected with the soil
Drymarchon corais: large dark-blue nonvenomous snake that invades burrows; found in southern North America and Mexico
Drymarchon corais couperi: a variety of indigo snake
dryopithecine: considered a possible ancestor to both anthropoid apes and humans
Dryopithecus Rudapithecus hungaricus: fossil hominoids from northern central Hungary; late Miocene
duck: small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs
duck-billed dinosaur: any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
duckling: young duck
Dugong dugon: sirenian tusked mammal found from eastern Africa to Australia; the flat tail is bilobate
Dumetella carolinensis: North American songbird whose call resembles a cat's mewing
dun: horse of a dull brownish grey color
dung beetle: any of numerous beetles that roll balls of dung on which they feed and in which they lay eggs
Duplicidentata: in former classifications considered a suborder of Rodentia coextensive with the order Lagomorpha: gnawing animals
Durham: English breed of short-horned cattle
Dusicyon cancrivorus: wild dog of northern South America
dusky salamander: common North American salamander mottled with dull brown or greyish-black
dusky-footed wood rat: a wood rat with dusky feet
dwarf pocket rat: small silky-haired pouched rodent; similar to but smaller than kangaroo rats
Eacles imperialis: large American moth having yellow wings with purplish or brownish markings; larvae feed on e.g. maple and pine trees
eagle ray: powerful free-swimming tropical ray noted for `soaring' by flapping winglike fins; usually harmless but has venomous tissue near base of the tail as in stingrays
eaglet: a young eagle
eared seal: pinniped mammal having external ear flaps and hind limbs used for locomotion on land; valued for its soft underfur
earless lizard: any of several slender lizards without external ear openings: of plains of western United States and Mexico
earless seal: any of several seals lacking external ear flaps and having a stiff hairlike coat with hind limbs reduced to swimming flippers
earwig: any of numerous insects of the order Dermaptera having elongate bodies and slender many-jointed antennae and a pair of large pincers at the rear of the abdomen
Easter bunny: a rabbit that delivers Easter eggs
eastern kingbird: a kingbird that breeds in North America and winters in tropical America; distinguished by a white band on the tip of the tail
Echeneis naucrates: remoras found attached to sharks
Echidnophaga gallinacea: parasitic on especially the heads of chickens
echinococcus: tapeworms whose larvae are parasitic in humans and domestic animals
echinoderm: marine invertebrates with tube feet and five-part radially symmetrical bodies
Echinus esculentus: a sea urchin that can be eaten
Ectopistes migratorius: gregarious North American migratory pigeon now extinct
ectoproct: sessile mossy aquatic animal having the anus of the polyp outside the crown of tentacles
ectotherm: an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals
edaphosaurus: heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic
edentate: primitive terrestrial mammal with few if any teeth; of tropical Central America and South America
Edmontonia: heavily armored and highly spiked dinosaur with semi-upright posture
edmontosaurus: duck-billed dinosaur from Canada found as a fossilized mummy with skin
eel: voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins
eelblenny: eellike fishes found in subarctic coastal waters
eelpout: marine eellike mostly bottom-dwelling fishes of northern seas
eelworm: any of various small free-living plant-parasitic roundworms
eft: a newt in its terrestrial stage of development
egg-laying mammal: the most primitive mammals comprising the only extant members of the subclass Prototheria
eggar: moth having nonfunctional mouthparts as adults; larvae feed on tree foliage and spin egg-shaped cocoons
egret: any of various usually white herons having long plumes during breeding season
Egretta caerulea: small bluish-grey heron of the western hemisphere
Egretta garzetta: Old World egret
Egretta thula: small New World egret
Egyptian cat: a domestic cat of Egypt
Egyptian cobra: cobra used by the Pharaohs as a symbol of their power over life and death
eider: duck of the northern hemisphere much valued for the fine soft down of the females
Eira barbara: long-tailed arboreal mustelid of Central America and South America
Elagatis bipinnulata: streamlined cigar-shaped jack; good game fish
eland: either of two large African antelopes of the genus Taurotragus having short spirally twisted horns in both sexes
Elanoides forficatus: graceful North American black-and-white kite
Elanus leucurus: grey-and-white American kite of warm and tropical regions
Elaphe guttata: large harmless snake of southeastern United States; often on farms
Elaphe obsoleta: large harmless shiny black North American snake
Elaphurus davidianus: large Chinese deer surviving only in domesticated herds
elapid: any of numerous venomous fanged snakes of warmer parts of both hemispheres
elasmobranch: any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks; rays; skates
elater: any of various widely distributed beetles
Electrophorus electric: eel-shaped freshwater fish of South America having electric organs in its body
elephant: five-toed pachyderm
elephant seal: either of two large northern Atlantic earless seals having snouts like trunks
Elops saurus: game fish resembling the tarpon but smaller
elver: young eel
Emberiza aureola: common in Russia and Siberia
Emberiza citrinella: European bunting the male being bright yellow
Emberiza hortulana: brownish Old World bunting often eaten as a delicacy
Emberiza schoeniclus: European bunting inhabiting marshy areas
emperor: large richly colored butterfly
English bulldog: a sturdy thickset short-haired breed with a large head and strong undershot lower jaw; developed originally in England for bull baiting
English cocker spaniel: a small breed with wavy silky hair; originally developed in England
English foxhound: an English breed slightly larger than the American foxhounds originally used to hunt in packs
English lady crab: crab of the English coasts
English setter: an English breed having a plumed tail and a soft silky coat that is chiefly white
English springer spaniel: a breed having typically a black-and-white coat
English toy spaniel: British breed having a long silky coat and rounded head with a short upturned muzzle
Engraulis encrasicholus: esteemed for its flavor; usually preserved or used for sauces and relishes
Enhydra lutris: large marine otter of northern Pacific coasts having very thick dark brown fur
Enterobius vermicularis: small threadlike worm infesting human intestines and rectum especially in children
entire: uncastrated adult male horse
EntleBucher: the smallest of the Sennenhunde
entoproct: any of various moss-like aquatic animals usually forming branching colonies; each polyp having a both mouth and anus within a closed ring of tentacles
eoraptor: a theropod dinosaur of the genus Eoraptor
ephemeral: anything short-lived, as an insect that lives only for a day in its winged form
ephemerid: short-lived insect
Ephestia elutella: small moth whose larvae feed on tobacco and other dried plant products
Ephippiorhynchus senegalensis: large black-and-white stork of tropical Africa; its red bill has a black band around the middle
Epilachna varivestis: introduced into the United States from Mexico; feeds on the foliage of the bean plant
Epinephelus adscensionis: found around rocky coasts or on reefs
Epinephelus fulvus: black-spotted usually dusky-colored fish with reddish fins
eptatretus: a fossil hagfish of the genus Eptatretus
Eptesicus fuscus: rather large North American brown bat; widely distributed
Eptesicus serotinus: common brown bat of Europe
Equetus lanceolatus: black-and-white drumfish with an erect elongated dorsal fin
Equetus pulcher: a kind of drumfish
equid: hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck
Equus asinus: domestic beast of burden descended from the African wild ass; patient but stubborn
Equus caballus: solid-hoofed herbivorous quadruped domesticated since prehistoric times
Equus caballus gomelini: European wild horse extinct since the early 20th century
Equus caballus przewalskii: wild horse of central Asia that resembles an ass; now endangered
Equus grevyi: zebra with less continuous stripes
Equus hemionus: Asiatic wild ass
Equus hemionus hemionus: Mongolian wild ass
Equus kiang: wild ass of Tibet and Mongolia
Equus quagga: mammal of South Africa that resembled a zebra; extinct since late 19th century
Equus zebra zebra: narrow-striped nearly extinct zebra of southern Africa
Erethizon dorsatum: porcupine of northeastern North America with barbed spines concealed in the coarse fur; often gnaws buildings for salt and grease
Eretmochelys imbricata: pugnacious tropical sea turtle with a hawk-like beak; source of food and the best tortoiseshell
Erignathus barbatus: medium-sized greyish to yellow seal with bristles each side of muzzle; of the Arctic Ocean
Erinaceus europeaeus: small nocturnal Old World mammal covered with both hair and protective spines
Eriosoma lanigerum: primarily a bark feeder on aerial parts and roots of apple and other trees
Erithacus rubecola: small Old World songbird with a reddish breast
Erithacus svecicus: songbird of northern Europe and Asia
Erolia alpina: small common sandpiper that breeds in northern or Arctic regions and winters in southern United States or Mediterranean regions
Erolia minutilla: smallest American sandpiper
Erythrocebus patas: reddish long-tailed monkey of west Africa
escallop: edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions
Eschrichtius robustus: medium-sized greyish-black whale of the northern Pacific
Eskimo dog: breed of heavy-coated Arctic sled dog
Esox americanus: small but gamy pickerel of Atlantic coastal states
Esox lucius: voracious piscivorous pike of waters of northern hemisphere
Esox masquinongy: large (60 to 80 pounds) sport fish of North America
Esox niger: common in quiet waters of eastern United States
Etropus rimosus: flounder found from North Carolina to Florida and the eastern Gulf of Mexico
Euarctos americanus: brown to black North American bear; smaller and less ferocious than the brown bear
Eucinostomus gula: silvery mojarra found along sandy shores of the western Atlantic
Euderma maculata: a large bat of the southwestern United States having spots and enormous ears
Eumeces callicephalus: frequents oak and pine habitats in rocky mountainous areas of United States southwest and Mexico
Eumeces skiltonianus: found in western North American grasslands and open woodlands
Eumetopias jubatus: largest sea lion; of the northern Pacific
Eunectes murinus: large arboreal boa of tropical South America
Euopean hoopoe: pinkish-brown hoopoe with black-and-white wings
Euphagus carilonus: North American blackbird whose bluish-black plumage is rusty-edged in the fall
Euphausia pacifica: food for jellyfish
Euphractus sexcinctus: Argentine armadillo with six movable bands and hairy underparts
Euproctis chrysorrhoea: white furry-bodied European moth with a yellow tail tuft
Euproctis phaeorrhoea: small brown and white European moth introduced into eastern United States; pest of various shade and fruit trees
Eurasian badger: a variety of badger native to Europe and Asia
Eurasian green toad: Eurasian toad with variable chiefly green coloring
Eurasian kingfisher: small kingfisher with greenish-blue and orange plumage
Eurasian otter: otter found in Europe and Asia
European black grouse: large northern European grouse that is black with a lyre-shaped tail
European blackbird: common black European thrush
European bream: European freshwater fish having a flattened body and silvery scales; of little value as food
European catfish: large elongated catfish of central and eastern Europe
European corn borer moth: native to Europe; in America the larvae bore into the stem and crown of corn and other plants
European cuckoo: common cuckoo of Europe having a distinctive two-note call; lays eggs in the nests of other birds
European fire salamander: a kind of European salamander
European house cricket: lives in human dwellings; naturalized in parts of America
European lemming: notable for mass migrations even into the sea where many drown
European magpie: a common magpie of Eurasia
European nuthatch: a kind of nuthatch
European sandpiper: a variety of sandpiper
European sole: highly valued as food
European spider crab: a large spider crab of Europe
European swift: common European bird with a shrieking call that nests chiefly about eaves of buildings or on cliffs
European toad: common toad of Europe
European tortoise: small land tortoise of southern Europe
European water ouzel: a water ouzel of Europe
European water shrew: widely distributed Old World water shrew
European wolf spider: large southern European spider once thought to be the cause of tarantism (uncontrollable bodily movement)
European wood mouse: nocturnal yellowish-brown mouse inhabiting woods and fields and gardens
eurypterid: large extinct scorpion-like arthropod considered related to horseshoe crabs
Eutamius sibiricus: terrestrial Siberian squirrel
eutherian: mammals having a placenta; all mammals except monotremes and marsupials
Euthynnus pelamis: oceanic schooling tuna of considerable value in Pacific but less in Atlantic; reaches 75 pounds; very similar to if not the same as oceanic bonito
ewe: female sheep
Exmoor: horned sheep of Devon; valued for mutton
Exmoor: stocky breed of pony with a fawn-colored nose
eyas: an unfledged or nestling hawk
fairy shrimp: small freshwater branchiopod having a transparent body with many appendages; swims on its back
fairy swallow: fancy domestic pigeon having blue-and-white plumage and heavily muffed feet
Falco columbarius: small falcon of Europe and America having dark plumage with black-barred tail; used in falconry
Falco peregrinus: a widely distributed falcon formerly used in falconry
Falco rusticolus: large and rare Arctic falcon having white and dark color phases
Falco sparverius: small North American falcon
Falco subbuteo: small Old World falcon formerly trained and flown at small birds
Falco tinnunculus: small Old World falcon that hovers in the air against a wind
falcon: diurnal birds of prey having long pointed powerful wings adapted for swift flight
falcon-gentil: female falcon especially a female peregrine falcon
fall cankerworm: green or brown white-striped looper; larva of Alsophila pometaria
false saber-toothed tiger: North American cat of the Miocene and Pliocene; much earlier and less specialized than members of the genus Smiledon
false scorpion: small nonvenomous arachnid resembling a tailless scorpion
false vampire: any New or Old World carnivorous bat erroneously thought to suck blood but in fact feeding on insects
family Aegypiidae: in some classifications considered the family comprising the Old World vultures which are more often included in the family Accipitridae
family Mutillidae: a family of wasps
farm animal: any animals kept for use or profit
Fasciola hepatica: flatworm parasitic in liver and bile ducts of domestic animals and humans
Fasciolopsis buski: fluke that is parasitic on humans and swine; common in eastern Asia
fawn: a young deer
feeder: an animal being fattened or suitable for fattening
feeder: an animal that feeds on a particular source of food
feist: a nervous belligerent little mongrel dog
felid: any of various lithe-bodied roundheaded fissiped mammals, many with retractile claws
Felis bengalensis: small spotted wildcat of southern Asia and Malaysia
Felis chaus: small Asiatic wildcat
Felis concolor: large American feline resembling a lion
Felis domesticus: any domesticated member of the genus Felis
Felis ocreata: widely distributed wildcat of Africa and Asia Minor
Felis pardalis: nocturnal wildcat of Central America and South America having a dark-spotted buff-brown coat
Felis serval: slender long-legged African wildcat having large untufted ears and tawny black-spotted coat
Felis silvestris: bushy-tailed wildcat of Europe that resembles the domestic cat and is regarded as the ancestor of the domestic cat
Felis tigrina: medium-sized wildcat of Central America and South America having a dark-striped coat
Felis wiedi: small spotted wildcat found from Texas to Brazil
Felis yagouaroundi: long-bodied long-tailed tropical American wildcat
female: an animal that produces gametes (ova) that can be fertilized by male gametes (spermatozoa)
female horse: female equine animal
female mammal: animals that nourish their young with milk
fence lizard: spiny lizard often seen basking on fences in the United States and northern Mexico
Fenusa pusilla: small black sawfly native to Europe but established in eastern United States; larvae mine the leaves of birches causing serious defoliation
ferret: domesticated albino variety of the European polecat bred for hunting rats and rabbits
ferret badger: small ferret-like badger of southeast Asia
fetus: an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal
fictional animal: animals that exist only in fiction (usually in children's stories)
fiddler crab: burrowing crab of American coastal regions having one claw much enlarged in the male
field mouse: any nocturnal Old World mouse of the genus Apodemus inhabiting woods and fields and gardens
field mouse: any of various small mouselike rodents of the family Cricetidae (especially of genus Microtus) having a stout short-tailed body and inconspicuous ears and inhabiting fields or meadows
field spaniel: large usually black hunting and retrieving spaniel with a dense flat or slightly wavy coat; cross between cocker and Sussex spaniel
fig-bird: greenish-yellow Australian oriole feeding chiefly on figs and other fruits
fighting cock: a cock bred and trained for fighting
filaria: slender threadlike roundworms living in the blood and tissues of vertebrates; transmitted as larvae by biting insects
filefish: narrow flattened warm-water fishes with leathery skin and a long file-like dorsal spine
filly: a young female horse under the age of four
finch: any of numerous small songbirds with short stout bills adapted for crushing seeds
fingerling: a young or small fish
finisher: an animal that wins in a contest of speed
fire ant: omnivorous ant of tropical and subtropical America that can inflict a painful sting
firebug: a true bug: brightly colored bug that can exude a stain
firefly: nocturnal beetle common in warm regions having luminescent abdominal organs
fish: any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills
fish duck: large crested fish-eating diving duck having a slender hooked bill with serrated edges
fish fly: similar to but smaller than the dobsonfly; larvae are used as fishing bait
fish louse: a kind of copepod
fissiped: terrestrial carnivores; having toes separated to the base: dogs; cats; bears; badgers; raccoons
Fissipedia: in some classifications considered a suborder of Carnivora
Fissurella apertura: marine limpet having a conical shell with an opening at the apex
flamingo: large pink to scarlet web-footed wading bird with down-bent bill; inhabits brackish lakes
flat-coated retriever: an English breed having a shiny black or liver-colored coat; retrieves game from land or water
flatfish: any of several families of fishes having flattened bodies that swim along the sea floor on one side of the body with both eyes on the upper side
flathead: food fish of the Indonesian region of the Pacific; resembles gurnards
flathead: pallid bottom-dwelling flat-headed fish with large eyes and a duck-like snout
flatworm: parasitic or free-living worms having a flattened body
flea: any wingless bloodsucking parasitic insect noted for ability to leap
flea beetle: any small leaf beetle having enlarged hind legs and capable of jumping
fledgeling: young bird that has just fledged or become capable of flying
flicker: North American woodpecker
flightless bird: flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
Florida smoothhound: found from the northern Gulf of Mexico to Brazil
Florida water rat: of Florida wetlands
flounder: any of various European and non-European marine flatfish
flour beetle: an insect that infests flour and stored grains
fluke: parasitic flatworms having external suckers for attaching to a host
fly: two-winged insects characterized by active flight
flycatching warbler: any of numerous American wood warblers that feed on insects caught on the wing
flying fish: tropical marine fishes having enlarged winglike fins used for brief gliding flight
flying fox: large bat with a head that resembles the head of a fox
flying mouse: tiny flying phalanger
flying opossum: nocturnal phalangers that move with gliding leaps using parachute-like folds of skin along the sides of the body
flying reptile: an extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimb
foal: a young horse
food fish: any fish used for food by human beings
Formica fusca: an ant frequently enslaved
Formica rufa: reddish-brown European ant typically living in anthills in woodlands
Formica sanguinea: slave-making ant widely distributed over the northern hemisphere
Fossa fossa: civet of Madagascar
fossorial mammal: a burrowing mammal having limbs adapted for digging
fox: alert carnivorous mammal with pointed muzzle and ears and a bushy tail; most are predators that do not hunt in packs
fox terrier: small lively black-and-white terriers formerly used to dig out foxes
foxhound: medium-sized glossy-coated hounds developed for hunting foxes
Frankliniella fusca: injurious to growing tobacco and peanuts
Fratercula arctica: common puffin of the northern Atlantic
Fratercula corniculata: northern Pacific puffin
freetail: small swift insectivorous bat with leathery ears and a long tail; common in warm regions
French bulldog: small stocky version of the bulldog having a sleek coat and square head
freshwater bass: North American food and game fish
freshwater clam: bivalve mollusk abundant in rivers of central United States
frigate bird: long-billed warm-water seabird with wide wingspan and forked tail
Fringilla coelebs: small European finch with a cheerful song
Fringilla montifringilla: Eurasian finch
fritillary: butterfly with brownish wings marked with black and silver
frogfish: fish having a frog-like mouth with a lure on the snout
froghopper: a variety of spittlebug
frogmouth: insectivorous bird of Australia and southeastern Asia having a wide frog-like mouth
fruit bat: large Old World bat of warm and tropical regions that feeds on fruit
fruit fly: any of numerous small insects whose larvae feed on fruits
Fulica americana: a coot found in North America
Fulmarus glacialis: heavy short-tailed oceanic bird of polar regions
Fundulus heteroclitus: silver-and-black killifish of saltwater marshes along the Atlantic coast of the United States
Fundulus majalis: black-barred fish of bays and coastal marshes of the Atlantic and Gulf Coast of the United States
fungus gnat: mosquito-like insect whose larvae feed on fungi or decaying vegetation
fungus gnat: minute blackish gregarious flies destructive to mushrooms and seedlings
fur seal: eared seal of the southern hemisphere; the thick soft underfur is the source of sealskin
fur seal: an eared seal of the northern Pacific
gadfly: any of various large flies that annoy livestock
gadoid: a soft-finned fish of the family Gadidae
Gadus macrocephalus: closely related to Atlantic cod
Gadus morhua: one of the world's most important commercial fishes
Galeocerdo cuvieri: large dangerous warm-water shark with striped or spotted body
Galeorhinus zyopterus: Pacific shark valued for its fins (used by Chinese in soup) and liver (rich in vitamin A)
Galictis vittatus: carnivore of Central America and South America resembling a weasel with a greyish-white back and dark underparts
gall gnat: fragile mosquito-like flies that produce galls on plants
Gallant Fox: thoroughbred that won the triple crown in 1930
Galleria mellonella: moth whose larvae live in and feed on bee honeycombs
gallfly: any of various insects that deposit their eggs in plants causing galls in which the larvae feed
gallina: small Asiatic wild bird; believed to be ancestral to domestic fowl
gallinacean: heavy-bodied largely ground-feeding domestic or game birds
Gallinago gallinago: common snipe of Eurasia and Africa
Gallinago gallinago delicata: American snipe
Gallinago media: Old World snipe larger and darker than the whole snipe
Gallinula chloropus: black gallinule that inhabits ponds and lakes
Gallinula chloropus cachinnans: North American dark bluish-grey gallinule
gallinule: any of various small aquatic birds of the genus Gallinula distinguished from rails by a frontal shield and a resemblance to domestic hens
Galloway: breed of hardy black chiefly beef cattle native to Scotland
Gallus gallus: a jungle fowl of southeastern Asia that is considered ancestral to the domestic fowl
Gallus gallus: a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl
Gambusia affinis: silvery topminnow with rows of black spots of tropical North America and West Indies; important in mosquito control
game: animal hunted for food or sport
game bird: any bird (as grouse or pheasant) that is hunted for sport
game fish: any fish providing sport for the angler
game fowl: any of several breeds reared for cockfighting
gander: mature male goose
gannet: large heavily built seabird with a long stout bill noted for its plunging dives for fish
ganoid: primitive fishes having thick bony scales with a shiny covering
garden snail: any of several inedible snails of the genus Helix; often destructive pests
garter snake: any of numerous nonvenomous longitudinally-striped viviparous North American and Central American snakes
Gasterophilus intestinalis: parasitic chiefly on horses
Gasterosteus aculeatus: of rivers and coastal regions
Gasterosteus pungitius: confined to rivers
Gastrophryne carolinensis: small toad of southeastern United States
Gastrophryne olivacea: small secretive toad with smooth tough skin of central and western North America
gastropod: a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes
gastrula: double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm
Gavialis gangeticus: large fish-eating Indian crocodilian with a long slender snout
gaviiform seabird: seabirds of the order Gaviiformes
Gazella subgutturosa: a kind of gazelle
gazelle: small swift graceful antelope of Africa and Asia having lustrous eyes
gecko: any of various small chiefly tropical and usually nocturnal insectivorous terrestrial lizards typically with immovable eyelids; completely harmless
gee-gee: a word for horse used by children or in adult slang
gelding: castrated male horse
Gelechia gossypiella: larvae of a gelechiid moth introduced from Asia; feeds on the seeds of cotton bolls
Gelechia gossypiella: small brown moth whose larvae bore into flowers and bolls of cotton
gelechiid: small slender-winged moths whose larvae are agricultural pests
gempylid: snake mackerels; elongated marine fishes with oily flesh; resembles mackerels; found worldwide
Gempylus serpens: predatory tropical fishes with jutting jaws and strong teeth
Genetta genetta: agile Old World viverrine having a spotted coat and long ringed tail
genus Acarus: any of several mites of the order Acarina
genus Argentinosaurus: enormous dinosaur of the middle Cretaceous found in Argentina
genus Cryptoprocta: large primitive cat-like carnivores inhabiting forests of Madagascar
genus Javanthropus: former genus of primitive man; now Homo soloensis: comprises Solo man
genus Paranthropus: former classification for Australopithecus robustus
genus Sinanthropus: genus to which Peking man was formerly assigned
genus Zinjanthropus: genus to which Australopithecus boisei was formerly assigned
Genyonemus lineatus: small silvery marine food fish found off California
Geococcyx californianus: speedy largely terrestrial bird found from California and Mexico to Texas
geoduck: a large edible clam found burrowing deeply in sandy mud along the Pacific coast of North America; weighs up to six pounds; has siphons that can extend to several feet and cannot be withdrawn into the shell
geometrid: slender-bodied broad-winged moth whose larvae are called measuring worms
Geomys bursarius: gopher of chiefly grasslands of central North America
Geomys pinetis: gopher of Alabama and Georgia and Florida
gerbil: small Old World burrowing desert rodent with long soft pale fur and hind legs adapted for leaping
German bee: dark-colored ill-tempered honeybee supposedly of German origin
German shepherd dog: breed of large shepherd dogs used in police work and as a guide for the blind
German short-haired pointer: liver or liver-and-white hunting dog developed in Germany; 3/4 pointer and 1/4 bloodhound
Gerres cinereus: popular panfish from Bermuda and Gulf of Mexico to Brazil
Gerris lacustris: a variety of water strider
giant: any creature of exceptional size
giant cockroach: large tropical American cockroaches
giant schnauzer: a large schnauzer
giant silkworm moth: any silkworm moth of the family Saturniidae
giant silkworm: larva of a saturniid moth; spins a large amount of strong silk in constructing its cocoon
giant tortoise: very large tortoises of the Galapagos and Seychelles islands
giant water bug: large water bug with piercing and sucking mouthparts; feeds on young fishes
gib: a castrated tomcat
Ginglymostoma cirratum: small bottom-dwelling shark of warm shallow waters on both coasts of North America and South America and from southeast Asia to Australia
Giraffa camelopardalis: tallest living quadruped; having a spotted coat and small horns and very long neck and legs; of savannahs of tropical Africa
glareole: Old World shorebird with long pointed wings and short legs; closely related to the coursers
glass lizard: snakelike lizard of Europe and Asia and North America with vestigial hind limbs and the ability to regenerate its long fragile tail
glass sponge: a siliceous sponge (with glassy spicules) of the class Hyalospongiae
Glaucomys sabrinus: large flying squirrel; chiefly of Canada
Glaucomys volans: small large-eyed nocturnal flying squirrel of eastern United States
Glis glis: large European dormouse
Globicephala melaena: small dark-colored whale of the Atlantic coast of the United States; the largest male acts as pilot or leader for the school
glossina: bloodsucking African fly; transmits sleeping sickness etc.
Glossopsitta versicolor: lorikeet with a colorful coat
glowworm: the luminous larva or wingless grub-like female of a firefly
gnat: any of various small biting flies: midges; biting midges; black flies; sand flies
gnat: (British usage) mosquito
gnatcatcher: very small North American and South American warblers
gnathostome: a vertebrate animal possessing true jaws
gnawer: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing
gnawing mammal: relative large gnawing animals; distinguished from rodents by having two pairs of upper incisors specialized for gnawing
gnu: large African antelope having a head with horns like an ox and a long tufted tail
goat antelope: bovid related to goats but having antelope-like features: mountain goats; gorals; serows; chamois; gnu goats
gobbler: male turkey
Gobiesox strumosus: clingfish with typical skillet shape
Gobio gobio: small slender European freshwater fish often used as bait by anglers
goby: small spiny-finned fish of coastal or brackish waters having a large head and elongated tapering body having the ventral fins modified as a sucker
godwit: large wading bird that resembles a curlew; has a long slightly upturned bill
golden mole: mole of southern Africa having iridescent guard hairs mixed with the underfur
golden plover: plovers of Europe and America having the backs marked with golden-yellow spots
golden retriever: an English breed having a long silky golden coat
goldeneye: a variety of green lacewing
gomphothere: extinct elephants of Central American and South America; of the Miocene and Pleistocene
Gonorhynchus gonorhynchus: fish of sandy areas of western Pacific and Indian oceans having an angular snout for burrowing into sand
goose: web-footed long-necked typically gregarious migratory aquatic birds usually larger and less aquatic than ducks
gopher: any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops
gopher: burrowing rodent of the family Geomyidae having large external cheek pouches; of Central America and southwestern North America
Gopherus agassizii: burrowing tortoise of the arid western United States and northern Mexico; may be reclassified as a member of genus Xerobates
Gopherus polypemus: burrowing edible land tortoise of southeastern North America
Gordon setter: a Scottish breed with a black-and-tan coat
gorgonian: corals having a horny or calcareous branching skeleton
Gorilla gorilla: largest anthropoid ape; terrestrial and vegetarian; of forests of central west Africa
Gorilla gorilla beringei: gorilla of Kivu highlands
Gorilla gorilla gorilla: a kind of gorilla
Gorilla gorilla grauri: a kind of gorilla
gosling: young goose
gracilariid: small dull or metallic-colored tineoid moths whose larvae mine in plant leaves
Gracula religiosa: glossy black Asiatic starling often taught to mimic speech
grade: a variety of cattle produced by crossbreeding with a superior breed
grain moth: moth whose larvae feed on grain
Grampus griseus: slaty-grey blunt-nosed dolphin common in northern seas
grass finch: usually brightly-colored Australian weaverbirds; often kept as cage birds
grass snake: either of two North American chiefly insectivorous snakes that are green in color
grasshopper mouse: insectivorous mouse of western North America
grasshopper: terrestrial plant-eating insect with hind legs adapted for leaping
gray hen: female black grouse
gray lemming: Old World lemming
gray mullet: freshwater or coastal food fishes a spindle-shaped body; found worldwide
gray: horse of a light gray or whitish color
great ape: any of the large anthropoid apes of the family Pongidae
Great Dane: very large powerful smooth-coated breed of dog
Great Pyrenees: bred of large heavy-coated white dogs resembling the Newfoundland
Greater Swiss Mountain dog: the largest of the four Swiss breeds
grebe: small compact-bodied almost completely aquatic bird that builds floating nests; similar to loons but smaller and with lobate rather than webbed feet
green June beetle: large greenish June beetle of southern United States
green mamba: green phase of the black mamba
green peach aphid: yellowish green aphid that is especially destructive to peaches
green plover: large crested Old World plover having wattles and spurs
green snake: any of numerous African colubrid snakes
greenbottle: blowfly with brilliant coppery green body
greeneye: bottom-dwellers having large eyes with metallic green luster
greenfly: greenish aphid; pest on garden and crop plants
greenling: food fish of the northern Pacific
grenadier: deep-sea fish with a large head and body and long tapering tail
greyhound: a tall slender dog of an ancient breed noted for swiftness and keen sight; used as a racing dog
griffon: breed of medium-sized long-headed dogs with downy undercoat and harsh wiry outer coat; originated in Holland but largely developed in France
groenendael: black-coated sheepdog with a heavily plumed tail
grosbeak: any of various finches of Europe or America having a massive and powerful bill
ground roller: Madagascan roller with terrestrial and crepuscular habits that feeds on e.g. insects and worms
ground sloth: gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in America
ground-shaker: huge herbivorous dinosaur of the Cretaceous found in western North America
grouper: usually solitary bottom sea basses of warm seas
grouse: popular game bird having a plump body and feathered legs and feet
grub: a soft thick wormlike larva of certain beetles and other insects
grunt: medium-sized tropical marine food fishes that utter grunting sounds when caught
Grus americana: rare North American crane having black-and-white plumage and a trumpeting call
guan: any of several large turkey-like game birds of the family Cracidae; native to jungles of tropical America; resembling the curassows and valued as food
guard dog: a dog trained to guard property
guenon: small slender African monkey having long hind limbs and tail and long hair around the face
Guernsey: breed of dairy cattle from the island of Guernsey
guide dog: a dog trained to guide the blind
guillemot: small black or brown speckled auks of northern seas
guinea hen: female guinea fowl
guitarfish: primitive tropical bottom-dwelling ray with a guitar-shaped body
gull: mostly white aquatic bird having long pointed wings and short legs
Gulo gulo: musteline mammal of northern Eurasia
Gulo luscus: stocky shaggy-coated North American carnivorous mammal
gun dog: a dog trained to work with sportsmen when they hunt with guns
gurnard: bottom-dwelling coastal fishes with spiny armored heads and fingerlike pectoral fins used for crawling along the sea bottom
Gymnelis viridis: brightly colored scaleless Arctic eelpout
Gymnogyps californianus: North American condor; chiefly dull black; almost extinct
Gymnorhina tibicen: crow-sized black-and-white bird; a good mimic often caged
Gypaetus barbatus: the largest Eurasian bird of prey; having black feathers hanging around the bill
Gyps fulvus: large vulture of southern Europe and northern Africa having pale plumage with black wings
hack: a saddle horse used for transportation rather than sport etc.
hack: a horse kept for hire
hack: an old or over-worked horse
hackney: a compact breed of harness horse
Haematobia irritans: small black European fly introduced into North America; sucks blood from cattle especially at the base of the horn
Haemulon album: a grunt with a red mouth that is found from Florida to Brazil
Haemulon aurolineatum: found off the West Indies and Florida
Haemulon macrostomum: a kind of grunt
Haemulon malanurum: of warm Atlantic waters
Haemulon parra: a grunt found from Florida to Brazil and Gulf of Mexico
hag: eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies
hairstreak: small butterflies having striped markings under the wings
hake: any of several marine food fishes related to cod
halfbeak: tropical and subtropical marine and freshwater fishes having an elongated body and long protruding lower jaw
Haliaeetus leucocephalus: a large eagle of North America that has a white head and dark wings and body
Haliaeetus leucorhyphus: of southeast Europe and central Asia
Haliatus albicilla: bulky greyish-brown eagle with a short wedge-shaped white tail; of Europe and Greenland
halibut: marine food fish of the northern Atlantic or northern Pacific; the largest flatfish and one of the largest teleost fishes
Halicoeres bivittatus: small wrasse of tropical Atlantic
Halicoeres radiatus: bluish and bronze wrasse; found from Florida keys to Brazil
Haliotis tuberculata: an abalone found near the Channel Islands
hammerhead: medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous
Hampshire down: British breed of hornless dark-faced domestic sheep
hamster: short-tailed Old World burrowing rodent with large cheek pouches
handsaw fish: a soft-finned fish of the genus Alepisaurus
hanging fly: any of various mecopterous insects of the family Bittacidae
hard tick: ticks having a hard shield on the back and mouth parts that project from the head
hard-shell crab: edible crab that has not recently molted and so has a hard shell
hare: swift timid long-eared mammal larger than a rabbit having a divided upper lip and long hind legs; young born furred and with open eyes
hare wallaby: small Australian wallaby that resembles a hare and has persistent teeth
harness horse: horse used for pulling vehicles
harnessed antelope: any of several antelopes of the genus Tragelaphus having striped markings resembling a harness
Harpia harpyja: large black-and-white crested eagle of tropical America
harpy: any of various fruit bats of the genus Nyctimene distinguished by nostrils drawn out into diverging tubes
harrier: a hound that resembles a foxhound but is smaller; used to hunt rabbits
harrier: hawks that hunt over meadows and marshes and prey on small terrestrial animals
harrier eagle: any of numerous large Old World hawks intermediate in some respects between typical hawks and typical eagles
hart: a male deer, especially an adult male red deer
hartebeest: a large African antelope with lyre-shaped horns that curve backward
hatchling: any recently hatched animal (especially birds)
Hawaiian honeycreeper: small to medium-sized finches of the Hawaiian islands
hawk: diurnal bird of prey typically having short rounded wings and a long tail
hawk moth: any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed
head: a single domestic animal
headfish: among the largest bony fish; pelagic fish having an oval compressed body with high dorsal and anal fins and caudal fin reduced to a rudder-like lobe; worldwide in warm waters
hearing dog: dog trained to assist the deaf by signaling the occurrence of certain sounds
heart urchin: sea urchin having a heart-shaped body in a rigid spiny shell
hedgehog: relatively large rodents with sharp erectile bristles mingled with the fur
heifer: young cow
Heliothis zia: medium-sized moth whose larvae are corn earworms
Heliothis zia: larva of a noctuid moth; highly destructive to especially corn and cotton and tomato crops
Helix aspersa: serious garden pest having a brown shell with paler zigzag markings; nearly cosmopolitan in distribution
Helix hortensis: a kind of garden snail
Helix pomatia: one of the chief edible snails
helminth: worm that is parasitic on the intestines of vertebrates especially roundworms and tapeworms and flukes
Heloderma suspectum: large orange and black lizard of southwestern United States; not dangerous unless molested
Hemachatus haemachatus: highly venomous snake of southern Africa able to spit venom up to seven feet
Hemigalus hardwickii: an East Indian civet
Hemipteronatus novacula: a kind of razor fish
Hemitripterus americanus: large sculpin of western Atlantic; inflates itself when caught
hen: female of certain aquatic animals e.g. octopus or lobster
hen: adult female bird
herbivore: any animal that feeds chiefly on grass and other plants
Hereford: hardy English breed of cattle raised extensively in United States
Hermissenda crassicornis: a kind of sea slug
hermit crab: small soft-bodied marine crustaceans living in cast-off shells of gastropods
heron: grey or white wading bird with long neck and long legs and (usually) long bill
Herpestes ichneumon: northern African mongoose; in ancient times thought to devour crocodile eggs
herrerasaur: a kind of theropod dinosaur found in Argentina
Hesperiphona vespertina: North American grosbeak
heteropterous insect: true bugs: insects whose forewings are membranous but have leathery tips
Heteroscelus incanus: tattler of Pacific coastal regions
heterostracan: extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian
Hexagrammos decagrammus: common food and sport fish of western coast of North America
Hexanchus griseus: large primitive shark widely distributed in warm seas
hexapod: an animal having six feet
high stepper: a horse trained to lift its feet high off the ground while walking or trotting
Himantopus himantopus: stilt of Europe and Africa and Asia having mostly white plumage but with black wings
Himantopus himantopus leucocephalus: stilt of the southwest Pacific including Australia and New Zealand having mostly white plumage but with black wings and nape of neck
Himantopus mexicanus: stilt of southwestern United States to northern South America having black plumage extending from the head down the back of the neck
Himantopus novae-zelandiae: blackish stilt of New Zealand sometimes considered a color phase of the white-headed stilt
Himantopus stilt: long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons
hind: a female deer, especially an adult female red deer
hind: any of several mostly spotted fishes that resemble groupers
hinny: hybrid offspring of a male horse and a female donkey or ass; usually sterile
Hippobosca equina: winged fly parasitic on horses
hippoboscid: bloodsucking dipterous fly parasitic on birds and mammals
Hippodamia convergens: a variety of ladybug
Hippoglossoides platessoides: large American food fish
Hippoglossus hippoglossus: largest United States flatfish
Hippoglossus stenolepsis: a righteye flounder found in the Pacific
Hippopotamus amphibius: massive thick-skinned herbivorous animal living in or around rivers of tropical Africa
Hippotragus niger: large black East African antelope with sharp backward-curving horns
Hipsurus caryi: Pacific coast fish
Hirudo medicinalis: large European freshwater leech formerly used for bloodletting
Hirundo nigricans: of Australia and Polynesia; nests in tree cavities
Hirundo pyrrhonota: North American swallow that lives in colonies and builds bottle-shaped mud nests on cliffs and walls
Hirundo rustica: common swallow of North America and Europe that nests in barns etc.
hog: a sheep up to the age of one year; one yet to be sheared
hognose snake: harmless North American snake with upturned nose; may spread its head and neck or play dead when disturbed
Holocanthus tricolor: gold and black butterflyfish found from West Indies to Brazil
Holocentrus ascensionis: bright red fish of West Indies and Bermuda
Holocentrus bullisi: a squirrelfish found from South Carolina to Bermuda and Gulf of Mexico
Holocentrus coruscus: on reefs from Bermuda and Florida to northern South America
holocephalan: fish with high compressed head and a body tapering off into a long tail
holometabola: insects that undergo complete metamorphosis
Holothuria edulis: of warm coasts from Australia to Asia; used as food especially by Chinese
holothurian: echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and tube feet; free-living mud feeders
Holstein-Friesian: a breed of dairy cattle from northern Holland
Homarus americanus: lobster of Atlantic coast of America
Homarus capensis: small lobster of southern Africa
Homarus vulgaris: lobster of Atlantic coast of Europe
homeotherm: an animal that has a body temperature that is relatively constant and independent of the environmental temperature
homer: pigeon trained to return home
hominid: a primate of the family Hominidae
hominoid: a primate of the superfamily Hominoidea
Homo erectus: extinct species of primitive hominid with upright stature but small brain
Homo habilis: extinct species of upright East African hominid having some advanced humanlike characteristics
Homo rhodesiensis: a primitive hominid resembling Neanderthal man but living in Africa
Homo sapiens: the only surviving hominid; species to which modern man belongs; bipedal primate having language and ability to make and use complex tools; brain volume at least 1400 cc
Homo sapiens neanderthalensis: extinct robust human of Middle Paleolithic in Europe and western Asia
Homo sapiens sapiens: subspecies of Homo sapiens; includes all modern races
Homo soloensis: extinct primitive hominid of late Pleistocene; Java; formerly Javanthropus
homo: any living or extinct member of the family Hominidae characterized by superior intelligence, articulate speech, and erect carriage
Homona coffearia: small Indian moth infesting e.g. tea and coffee plants
homopteran: insects having membranous forewings and hind wings
honey eater: Australasian bird with tongue and bill adapted for extracting nectar
honey guide: small bird of tropical Africa and Asia; feeds on beeswax and honey and larvae
honeycreeper: small bright-colored tropical American songbird with a curved bill for sucking nectar
hoofed mammal: any of a number of mammals with hooves that are superficially similar but not necessarily closely related taxonomically
hookworm: parasitic bloodsucking roundworms having hooked mouth parts to fasten to the intestinal wall of human and other hosts
hoop snake: any of various harmless North American snakes that were formerly believed to take tail in mouth and roll along like a hoop
hoopoe: any of several crested Old World birds with a slender downward-curved bill
hoot owl: any owl that hoots as distinct from screeching
hornbill: bird of tropical Africa and Asia having a very large bill surmounted by a bony protuberance; related to kingfishers
horned lizard: insectivorous lizard with hornlike spines on the head and spiny scales on the body; of western North America
horned owl: large owls having prominent ear tufts
hornet: large stinging paper wasp
horseleech: any of several large freshwater leeches
horseshoe bat: a bat of the family Rhinolophidae having a horseshoe-shaped leaf on the nose
horseshoe bat: any of numerous bats of the family Hipposideridae of northwest Africa or Philippines or Australia having a horseshoe-shaped leaf on the nose
hound: any of several breeds of dog used for hunting typically having large drooping ears
housedog: a dog trained to guard a house
howler: monkey of tropical South American forests having a loud howling cry
Hudson bay collared lemming: of northern Canada
human beings: all of the living human inhabitants of the earth
hummingbird: tiny American bird having brilliant iridescent plumage and long slender bills; wings are specialized for vibrating flight
Hungarian partridge: common European partridge
Hungarian pointer: Hungarian hunting dog resembling the Weimaraner but having a rich deep red coat
hunting dog: a dog used in hunting game
hunting spider: ground spider that hunts its prey instead of using a web
Hyaena brunnea: of southern Africa
Hyaena hyaena: of northern Africa and Arabia and India
hyaena: doglike nocturnal mammal of Africa and southern Asia that feeds chiefly on carrion
Hyalophora cecropia: North American silkworm moth; larvae feed on the leaves of forest trees
hydra: small tubular solitary freshwater hydrozoan polyp
Hydrobates pelagicus: sooty black petrel with white markings; of the northern Atlantic and Mediterranean
Hydrochoerus hydrochaeris: pig-sized tailless South American amphibious rodent with partly webbed feet; largest living rodent
Hydrodamalis gigas: extinct large sirenian mammal formerly found near the Asiatic coast of the Bering Sea
hydroid: colonial coelenterates having the polyp phase dominant
Hydromantes brunus: similar to Shasta salamander; lives in cliff crevices and taluses
Hydromantes shastae: primarily a cave dweller in the Mount Shasta area
Hyemoschus aquaticus: largest chevrotain; of marshy areas of west Africa
Hyla arenicolor: a small chiefly ground dweller that stays within easy jumping distance of water; of United States southwest and northern Mexico
Hyla crucifer: a small brown tree toad having a shrill call heard near wetlands of eastern United States and Canada in early spring
Hylactophryne augusti: of southwest United States and Mexico; call is like a dog's bark
Hylobates lar: smallest and most perfectly anthropoid arboreal ape having long arms and no tail; of southern Asia and East Indies
Hylocichla fuscescens: tawny brown North American thrush noted for its song
Hylocichla guttata: North American thrush noted for its complex and appealing song
Hylocichla mustelina: large thrush common in eastern American woodlands; noted for its melodious song
Hylophylax naevioides: a kind of antbird
hymenopter: insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing
Hynerpeton bassetti: fossil amphibian of the Devonian having well-developed forelimbs; found in Pennsylvania
Hypentelium nigricans: widely distributed in warm clear shallow streams
Hyperglyphe perciformis: blackish fish of New England waters
Hyperoodon ampullatus: northern Atlantic beaked whale with a bulbous forehead
Hyphantria cunea: moth whose larvae are fall webworms
Hyphantria cunea: a variety of webworm
Hypsiglena torquata: nocturnal prowler of western United States and Mexico
Hypsiprymnodon moschatus: small kangaroo of northeastern Australia
Ibero-mesornis: sparrow-sized fossil bird of the Cretaceous period having a vestigial tail; found in Spain; considered possibly the third most primitive of all birds
ibis: wading birds of warm regions having long slender down-curved bills
Ibis ibis: any of several Old World birds of the genus Ibis
Ibizan Podenco: breed of slender agile medium-sized hound found chiefly in the Balearic Islands; said to have been bred originally by the Pharaohs of ancient Egypt
ichneumon fly: hymenopterous insect that resembles a wasp and whose larvae are parasitic on caterpillars and other insect larvae
ichthyosaur: any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs
ichthyosaurus: ichthyosaurs of the Jurassic
Ichyostega: early tetrapod amphibian found in Greenland
Ictalurus punctatus: freshwater food fish common throughout central United States
Icteria virens: American warbler noted for imitating songs of other birds
Icterus galbula: a kind of New World oriole
Icterus galbula bullockii: western subspecies of northern oriole
Icterus galbula galbula: eastern subspecies of northern oriole
Icterus spurius: the male is chestnut-and-black
Ictiobus niger: fish of the lower Mississippi
ictodosaur: intermediate in form between the therapsids and most primitive true mammals
Ictonyx frenata: muishond of northern Africa
Ictonyx striata: ferret-sized muishond often tamed
Iguana iguana: large herbivorous tropical American arboreal lizards with a spiny crest along the back; used as human food in Central America and South America
iguanid: lizards of the New World and Madagascar and some Pacific islands; typically having a long tail and bright throat patch in males
iguanodon: massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and northern Africa; early Cretaceous period
imago: an adult insect produced after metamorphosis
Inachis io: European butterfly having reddish-brown wings each marked with a purple eyespot
inchworm: small hairless caterpillar having legs on only its front and rear segments; mostly larvae of moths of the family Geometridae
Indian buffalo: upland buffalo of eastern Asia where true water buffaloes do not thrive; used for draft and milk
Indian cobra: a cobra of tropical Africa and Asia
Indian elephant: Asian elephant having smaller ears and tusks primarily in the male
Indian mongoose: keen-sighted viverrine of southern Asia about the size of a ferret; often domesticated
Indian pony: a small native range horse
Indian rat snake: enter buildings in pursuit of prey
Indri brevicaudatus: large short-tailed lemur of Madagascar having thick silky fur in black and white and fawn
insect: small air-breathing arthropod
insectivore: any organism that feeds mainly on insects
insectivore: small insect-eating mainly nocturnal terrestrial or fossorial mammals
instar: an insect or other arthropod between molts
invertebrate: any animal lacking a backbone or notochord; the term is not used as a scientific classification
Iridoprocne bicolor: bluish-green-and-white North American swallow; nests in tree cavities
Irish setter: an Irish breed with a chestnut-brown or mahogany-red coat
Irish terrier: medium-sized breed with a wiry brown coat; developed in Ireland
Irish water spaniel: breed of large spaniels developed in Ireland having a heavy coat of liver-colored curls and a topknot of long curls and a nearly hairless tail
Irish wolfhound: large breed of hound with a rough thick coat
isopod: any of various small terrestrial or aquatic crustaceans with seven pairs of legs adapted for crawling
Istiophorus albicans: a kind of sailfish
Isurus glaucus: common blue-grey shark of southwest Pacific; sport and food fish
Isurus oxyrhincus: very swift active bluish shark found worldwide in warm waters; important game fish
Isurus paucus: similar to shortfin mako but darker blue
Italian bee: yellowish honeybee resembling the Carniolan bee in its habits
Italian greyhound: a toy dog developed from the greyhound
itch mite: whitish mites that attack the skin of humans and other animals
Ixobrychus exilis: small American bittern
Ixodes dammini: a northeastern tick now recognized as same species as Ixodes scapularis
Ixodes dentatus: usually does not bite humans; transmits Lyme disease spirochete to cottontail rabbits and wood rats
Ixodes neotomae: a tick that usually does not bite humans; transmits Lyme disease spirochete to dusky-footed wood rats
Ixodes pacificus: a tick that feeds on dusky-footed wood rat and bites humans; principal vector for Lyme disease in western United States especially northern California
Ixodes persulcatus: bites humans; a vector for Lyme disease spirochete
Ixodes ricinus: parasitic on sheep and cattle as well as humans; can transmit looping ill in sheep (acute viral disease of the nervous system); a vector for Lyme disease spirochete
Ixodes scapularis: parasitic on mice of genus Peromyscus and bites humans; principal vector for Lyme disease in eastern United States (especially New England); northern form was for a time known as Ixodes dammini (deer tick)
Ixodes spinipalpis: usually does not bite humans; transmits Lyme disease spirochete to cottontail rabbits and wood rats
Jabiru mycteria: large white stork of warm regions of the world especially America
jacamar: tropical American insectivorous bird having a long sharp bill and iridescent green or bronze plumage
jack: any of several fast-swimming predacious fishes of tropical to warm temperate seas
jack: male donkey
jackknife clam: marine clam having a long narrow curved thin shell
jackrabbit: large hare of western North America
Jaculus jaculus: a variety of jerboa
jaeger: rapacious seabird that pursues weaker birds to make them drop their prey
Japanese deer: small deer of Japan with slightly forked antlers
Japanese oyster: a large oyster native to Japan and introduced along the Pacific coast of the United States; a candidate for introduction in Chesapeake Bay
Japanese spaniel: breed of toy dogs originating in Japan having a silky black-and-white or red-and-white coat
jassid: a variety of leafhopper
jawfish: small large-mouthed tropical marine fishes common along sandy bottoms; males brood egg balls in their mouths; popular aquarium fishes
jay: crested largely blue bird
jellyfish: any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans
jennet: female donkey
jenny wren: any of several small active brown birds of the northern hemisphere with short upright tails; they feed on insects
jerboa: mouselike jumping rodent
jerboa kangaroo: brush-tailed rat kangaroo
jerboa rat: large Australian rat with hind legs adapted for leaping
Jersey: a breed of diary cattle developed on the island of Jersey
jird: gerbil of northern Africa
jointworm: larva of chalcid flies injurious to the straw of wheat and other grains
Jordanella floridae: a fish with a dark-blue back and whitish sides with red stripes; found in swamps and streams of Florida
jumping bristletail: wingless insect living in dark moist places as under dead tree trunks; they make erratic leaps when disturbed
jumping mouse: any of several primitive mouselike rodents with long hind legs and no cheek pouches; of woodlands of Eurasia and North America
jumping plant louse: small active cicada-like insect with hind legs adapted for leaping; feeds on plant juices
Junco hyemalis: common North American junco having grey plumage and eyes with dark brown irises
junco: small North American finch seen chiefly in winter
June beetle: any of various large usually brown North American leaf-eating beetles common in late spring; the larvae feed on roots of grasses etc.
jungle cock: male jungle fowl
jungle hen: female jungle fowl
Kakatoe galerita: white cockatoo with a yellow erectile crest
Kakatoe leadbeateri: white Australian cockatoo with roseate tinged plumage
Kamchatkan sea eagle: found on coasts of the northwestern Pacific
kangaroo: any of several herbivorous leaping marsupials of Australia and New Guinea having large powerful hind legs and a long thick tail
kangaroo mouse: leaping rodent of Australian desert areas
kangaroo rat: any of several rabbit-sized ratlike Australian kangaroos
Katsuwonus pelamis: fish whose flesh is dried and flaked for Japanese cookery; may be same species as skipjack tuna
katydid: large green long-horned grasshopper of North America; males produce shrill sounds by rubbing together special organs on the forewings
keeshond: a spitz-like dog having a shaggy greyish coat and tightly curled tail originating in Holland
kelpie: an Australian sheepdog with pointed ears
Kerry blue terrier: an Irish breed of medium-sized terriers with a silky blue-grey coat
kid: young goat
killifish: small mostly marine warm-water carp-like schooling fishes; used as bait or aquarium fishes or in mosquito control
King Charles spaniel: a toy English spaniel with a black-and-tan coat; named after Charles II who popularized it
king snake: any of numerous nonvenomous North American constrictors; feed on other snakes and small mammals
kingfish: any of several food and game fishes of the drum family indigenous to warm Atlantic waters of the North American coast
kingfisher: nonpasserine large-headed bird with a short tail and long sharp bill; usually crested and bright-colored; feed mostly on fish
kinglet: small birds resembling warblers but having some of the habits of titmice
kit: young of any of various fur-bearing animals
kite: any of several small graceful hawks of the family Accipitridae having long pointed wings and feeding on insects and small animals
kitten: young domestic cat
kittiwake: small pearl-grey gull of northern regions; nests on cliffs and has a rudimentary hind toe
kitty: informal terms referring to a domestic cat
Kobus kob: an orange-brown antelope of southeast Africa
Kobus leche: tawny-colored African antelope inhabiting wet grassy plains; a threatened species
Kogia breviceps: small sperm whale of warm waters of both coasts of North America
Kogia simus: very small (to 8 feet) sperm whale of central coasts of Atlantic and Pacific
komondor: Hungarian breed of large powerful shaggy-coated white dog; used also as guard dog
koodoo: either of two spiral-horned antelopes of the African bush
krait: brightly colored venomous but nonaggressive snake of southeastern Asia and Malay peninsula
krill: shrimp-like planktonic crustaceans; major source of food for e.g. baleen whales
kuvasz: long-established Hungarian breed of tall light-footed but sturdy white dog; used also as a hunting dog
Kyphosus sectatrix: food and game fish around Bermuda and Florida; often follow ships
Labrador retriever: breed originally from Labrador having a short black or golden-brown coat
labyrinthodont: an amphibian of the superorder Labyrinthodontia
lace bug: small bug having body and wings covered with a lacy network of raised lines
Lacerta agilis: a common and widely distributed lizard of Europe and central Asia
Lacerta viridis: a common Eurasian lizard about a foot long
lacertid: Old World terrestrial lizard
lacewing: any of two families of insects with gauzy wings (Chrysopidae and Hemerobiidae); larvae feed on insect pests such as aphids
Lachnolaimus maximus: large wrasse of western Atlantic; head of male resembles a pig's snout
Lactophrys quadricornis: trunkfish having hornlike spines over the eyes
lady beetle: small round bright-colored and spotted beetle that usually feeds on aphids and other insect pests
Lagodon rhomboides: similar to sea bream; small spiny-finned fish found in bays along the southeastern coast of the United States
Lagopus scoticus: reddish-brown grouse of upland moors of Great Britain
Lagostomus maximus: gregarious burrowing rodent larger than the chinchillas
lake salmon: Atlantic salmon confined to lakes of New England and southeastern Canada
Lakeland terrier: breed of wire-haired terrier originally from the Lake District of England and used for hunting
Lama guanicoe: wild llama
Lama pacos: domesticated llama with long silky fleece; believed to be a domesticated variety of the guanaco
Lama peruana: used in the Andes as a beast of burden and source of wool; considered a domesticated variety of the guanaco
lamb: young sheep
lambkin: a very young lamb
lamellicorn beetle: beetle having antennae with hard platelike terminal segments
Lamna nasus: voracious pointed-nose shark of northern Atlantic and Pacific
lamper eel: primitive eellike freshwater or anadromous cyclostome having round sucking mouth with a rasping tongue
Lampris guttatus: from Nova Scotia to West Indies and Gulf of Mexico
Lampris regius: large elliptical brightly colored deep-sea fish of Atlantic and Pacific and Mediterranean
Lampropeltis getulus: widespread in United States except northern regions; black or brown with yellow bands
Lampropeltis triangulum: nonvenomous tan and brown king snake with an arrow-shaped occipital spot; southeastern ones have red stripes like coral snakes
lancet fish: large elongate scaleless oceanic fishes with sharp teeth and a long dorsal fin that resembles a sail
langur: slender long-tailed monkey of Asia
Lanius borealis: a butcherbird of northern North America
Lanius excubitor: a common European butcherbird
Lanius lucovicianus: a common shrike of southeastern United States having black bands around the eyes
Lanius ludovicianus excubitorides: a butcherbird of western North America; grey with white underparts
Lanius ludovicianus migrans: a shrike of central North America; winters in Texas and the southern Mississippi valley
lantern fly: large brightly marked tropical insect with a process like a snout that was formerly thought to emit light
lanternfish: small fish having rows of luminous organs along each side; some surface at night
Lanthanotus borneensis: a stout-bodied pleurodont lizard of Borneo
lapdog: a dog small and tame enough to be held in the lap
lapin: castrated male rabbit
lappet caterpillar: larva of a lappet moth
lappet: medium-sized hairy moths; larvae are lappet caterpillars
large poodle: the largest breed of poodle
larid: long-winged web-footed aquatic bird of the gull family
lark: any of numerous predominantly Old World birds noted for their singing
lark: North American songbirds having a yellow breast
lark: a songbird that lives mainly on the ground in open country; has streaky brown plumage
Larus argentatus: large gull of the northern hemisphere
Larus canus: the common gull of Eurasia and northeastern North America
Larus marinus: white gull having a black back and wings
Larus ridibundus: small black-headed European gull
larva: the immature free-living form of most invertebrates and amphibians and fish which at hatching from the egg is fundamentally unlike its parent and must metamorphose
larvacean: any member of the class Larvacea
lasiocampid: medium-sized stout-bodied neutral-colored moths with comb-like antennae
Lasiurus borealis: North American bat of a brick or rusty red color with hairs tipped with white
Latimeria chalumnae: fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa
Latrodectus mactans: venomous New World spider; the female is black with an hourglass-shaped red mark on the underside of the abdomen
launce: very small silvery eellike schooling fishes that burrow into sandy beaches
layer: a hen that lays eggs
leaf bug: small bright-colored insect that feeds on plant juices
leaf insect: tropical insect having a flattened leaflike body; common in southern Asia and the East Indies
leaf miner: any of various small moths or dipterous flies whose larvae burrow into and feed on leaf tissue especially of the family Gracilariidae
leaf roller: moth whose larvae form nests by rolling and tying leaves with spun silk
leaf-cutter: bee that cuts rounded pieces from leaves and flowers to line its nest
leaf-foot bug: large sap-sucking bug with leaflike expansions on the legs
leaf-nosed snake: any of various pale blotched snakes with a blunt snout of southwestern North America
leafhopper: small leaping insect that sucks the juices of plants
leafnose bat: bat having a leaflike flap at the end of the nose; especially of the families Phyllostomatidae and Rhinolophidae and Hipposideridae
leather carp: scaleless domestic carp
leatherfish: any of several brightly colored tropical filefishes
leatherjack: any of several New World tropical fishes having tiny embedded scales
leatherjacket: tough-skinned larva of certain crane flies
Lebistes reticulatus: small freshwater fish of South America and the West Indies; often kept in aquariums
lefteye flounder: flatfishes with both eyes on the left side of the head
legless lizard: degenerate wormlike burrowing lizard of California closely related to alligator lizards
Leipoa ocellata: Australian mound bird; incubates eggs naturally in sandy mounds
lemming: any of various short-tailed furry-footed rodents of circumpolar distribution
Lemmus trimucronatus: of northwestern Canada and Alaska
lemur: large-eyed arboreal prosimian having foxy faces and long furry tails
Leonberg: a large dog (usually with a golden coat) produced by crossing a St Bernard and a Newfoundland
leoncita: small South American marmoset with silky fur and long nonprehensile tail
Leontocebus oedipus: South American tamarin with a tufted head
Leontocebus rosalia: golden South American monkey with long soft hair forming a mane
leopard lizard: any of several large lizards with many dark spots; of western United States and northern Mexico
leopardess: female leopard
Lepas fascicularis: stalked barnacle that attaches to ship bottoms or floating timbers
Lepidochelys kempii: grey sea turtle of the Atlantic and Gulf Coasts of North America
Lepidochelys olivacea: olive-colored sea turtle of tropical Pacific and Indian and the southern Atlantic oceans
Lepidocybium flavobrunneum: large snake mackerel with rings like spectacles around its eyes
lepidopteran: insect that in the adult state has four wings more or less covered with tiny scales
Lepisma saccharina: silver-grey wingless insect found in houses feeding on book bindings and starched clothing
Lepisosteus osseus: primitive predaceous North American fish covered with hard scales and having long jaws with needlelike teeth
Lepomis gibbosus: small brilliantly colored North American sunfish
Lepomis macrochirus: important edible sunfish of eastern and central United States
Lepomis punctatus: inhabits streams from South Carolina to Florida; esteemed panfish
leporid: rabbits and hares
Leptinotarsa decemlineata: black-and-yellow beetle that feeds in adult and larval stages on potato leaves; originally of eastern Rocky Mountains; now worldwide
leptocephalus: slender transparent larva of eels and certain fishes
leptodactylid: toothed frogs: terrestrial or aquatic or arboreal
Leptodactylus pentadactylus: large toothed frog of South America and Central America resembling the bullfrog
Leptoptilus crumeniferus: large African black-and-white carrion-eating stork; its downy underwing feathers are used to trim garments
Leptoptilus dubius: large Indian stork with a military gait
Leptotyphlops humilis: burrows among roots of shrubs and beneath rocks in desert and rocky hillside areas and beach sand of western United States
Lepus americanus: large large-footed North American hare; white in winter
Lepus arcticus: a large hare of northern North America; it is almost completely white in winter
Lepus californicus: the common jackrabbit of grasslands and open areas of western United States; has large black-tipped ears and black streak on the tail
Lepus europaeus: large hare introduced in North America; does not turn white in winter
Lepus townsendi: largest hare of northern plains and western mountains of United States; brownish-grey in summer and pale grey in winter; tail nearly always all white
lerot: dormouse of southern Europe and northern Africa
lesser ape: gibbons and siamangs
Leuciscus cephalus: European freshwater game fish with a thick spindle-shaped body
Leuciscus leuciscus: small European freshwater fish with a slender bluish-green body
leveret: a young hare especially one in its first year
Lhasa apso: a breed of terrier having a long heavy coat raised in Tibet as watchdogs
Lichanura trivirgata: boa of rocky desert of southwestern United States
liger: offspring of a male lion and a female tiger
Limanda ferruginea: American flounder having a yellowish tail
Limenitis archippus: showy American butterfly resembling the monarch but smaller
Limenitis arthemis: North American butterfly with blue-black wings crossed by a broad white band
Limenitis astyanax: similar to the banded purple but with red spots on underwing surfaces
Limenitis camilla: Eurasian butterfly with brown wings and white markings
limicoline bird: any of numerous wading birds that frequent mostly seashores and estuaries
Limnocryptes minima: a small short-billed Old World snipe
Limnodromus griseus: a dowitcher with a grey back
Limnodromus scolopaceus: a dowitcher with a red breast
Limosa haemastica: New World godwit
limpet: any of various usually marine gastropods with low conical shells; found clinging to rocks in littoral areas
Lincoln: long-wooled mutton sheep originally from Lincolnshire
ling: American hakes
lion cub: a young lion
lioness: a female lion
lionet: a small or young lion
lionfish: brightly striped fish of the tropical Pacific having elongated spiny fins
Liopelma hamiltoni: primitive New Zealand frog with four unwebbed toes on forefeet and five on hind feet
Liparis liparis: small tadpole-shaped cold-water fishes with pelvic fins forming a sucker; related to lumpfish
Liposcelis divinatorius: minute wingless psocopterous insects injurious to books and papers
Lippizaner: a compact and sturdy saddle horse that is bred and trained in Vienna; smart and docile and excellent for dressage
Litocranius walleri: slender East African antelope with slim neck and backward-curving horns
littleneck: a young quahog
live-bearer: small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control
liver chestnut: a solid dark brown horse
liver-spotted dalmatian: a brown-spotted dalmatian
lizard: relatively long-bodied reptile with usually two pairs of legs and a tapering tail
lizardfish: tropical fishes with large mouths in lizard-like heads; found worldwide
llama: wild or domesticated South American cud-chewing animal related to camels but smaller and lacking a hump
loach: slender freshwater fishes of Eurasia and Africa resembling catfishes
Lobipes lobatus: breeds in Arctic regions of Old and New Worlds; large flocks often seen far out at sea
Lobotes surinamensis: tripletail found from Cape Cod to northern South America
lobster: any of several edible marine crustaceans of the families Homaridae and Nephropsidae and Palinuridae
lobworm: marine worms having a row of tufted gills along each side of the back; often used for fishing bait
locust: migratory grasshoppers of warm regions having short antennae
Locusta migratoria: Old World locust that travels in vast swarms stripping large areas of vegetation
Lofortyx californicus: plump chunky bird of coastal California and Oregon
loligo: somewhat flattened cylindrical squid
long-eared bat: any of various Old or New World bats having very long ears
long-horned beetle: long-bodied beetle having very long antennae
long-horned grasshopper: grasshoppers with long threadlike antennae and well-developed stridulating organs on the forewings of the male
longwool: a domestic long-wool sheep
Lophius Americanus: fishes having large mouths with a wormlike filament attached for luring prey
Lophodytes cucullatus: small North American duck with a high circular crest on the male's head
Lopholatilus chamaeleonticeps: yellow-spotted violet food fish of warm deep waters
lorikeet: any of various small lories
Loris gracilis: slim-bodied lemur of southern India and Sri Lanka
lory: small brightly colored Australasian parrots having a brush-tipped tongue for feeding on nectar and soft fruits
Lota lota: elongate freshwater cod of northern Europe and Asia and North America having barbels around its mouth
louse: any of several small insects especially aphids that feed by sucking the juices from plants
louse: wingless usually flattened bloodsucking insect parasitic on warm-blooded animals
lovebird: small African parrot noted for showing affection for their mates
Loxia curvirostra: finch with a bill whose tips cross when closed
Loxodonta africana: an elephant native to Africa having enormous flapping ears and ivory tusks
Loxostege similalis: moth whose larvae are garden webworms
Loxostege similalis: a variety of webworm
Lucy: incomplete skeleton of female found in eastern Ethiopia in 1974
Lumpenus lumpretaeformis: found in Arctic and northern Atlantic waters
lumpsucker: any of several very small lumpfishes
Lunda cirrhata: northern Pacific puffin having a large yellow plume over each eye
lungfish: air-breathing fish having an elongated body and fleshy paired fins; certain species construct mucus-lined mud coverings in which to survive drought
lungless salamander: mostly terrestrial salamanders that breathe through their thin moist skin; lay eggs in moist places on land; rarely enter water
Luscinia luscinia: large nightingale of eastern Europe
Luscinia megarhynchos: European songbird noted for its melodious nocturnal song
Lutjanus analis: similar to and often marketed as `red snapper'
Lutjanus apodus: food fish of warm Caribbean and Atlantic waters
Lutjanus blackfordi: an esteemed food fish with pinkish red head and body; common in the Atlantic coastal waters of North America and the Gulf of Mexico
Lutjanus griseus: found in shallow waters off the coast of Florida
Lutra canadensis: sociable aquatic animal widely distributed along streams and lake borders in North America
Luvarus imperialis: large silvery fish found worldwide in warm seas but nowhere common; resembles a whale and feeds on plankton
Lycaena hypophlaeas: common copper butterfly of central and eastern North America
lycaenid: any of various butterflies of the family Lycaenidae
lygaeid: a true bug: usually bright-colored; pest of cultivated crops and some fruit trees
lygus bug: vector of viral plant diseases
Lygus lineolaris: widespread plant and fruit pest
Lymantria dispar: European moth introduced into North America; a serious pest of shade trees
lymantriid: dull-colored moth whose larvae have tufts of hair on the body and feed on the leaves of many deciduous trees
Lynx canadensis: of northern North America
Lynx caracal: of deserts of northern Africa and southern Asia
Lynx lynx: of northern Eurasia
Lynx pardina: of southern Europe
Lynx rufus: small lynx of North America
lyre snake: mildly venomous snake with a lyre-shaped mark on the head; found in rocky areas from southwestern United States to Central America
lyrebird: Australian bird that resembles a pheasant; the courting male displays long tail feathers in a lyre shape
Lyrurus mlokosiewiczi: a black grouse of western Asia
Macaca irus: monkey of southeast Asia, Borneo and the Philippines
Macaca mulatta: of southern Asia; used in medical research
Macaca radiata: Indian macaque with a bonnet-like tuft of hair
Macaca sylvana: tailless macaque of rocky cliffs and forests of northwestern Africa and Gibraltar
macaque: short-tailed monkey of rocky regions of Asia and Africa
macaw: long-tailed brilliantly colored parrot of Central America and South America; among the largest and showiest of parrots
mackerel: any of various fishes of the family Scombridae
mackerel shark: fierce pelagic and oceanic sharks
Macrocephalon maleo: Celebes megapode that lays eggs in holes in sandy beaches
Macrocheira kaempferi: very large deep-water Japanese crab
Macroclemys temmincki: large species having three ridges on its back; found in southeastern United States
Macrodactylus subspinosus: common North American beetle: larvae feed on roots and adults on leaves and flowers of e.g. rose bushes or apple trees or grape vines
Macronectes giganteus: large brownish petrel chiefly of Antarctic seas
Macropus agiles: a small wallaby having a height of 30 inches
Macropus giganteus: very large greyish-brown Australian kangaroo formerly abundant in open wooded areas
Macrotis lagotis: bandicoot with leathery ears like a rabbit
Macrotus californicus: large-eared greyish bat of southern California and northwestern Mexico
Macrozoarces americanus: common along northeastern coast of North America
Madagascar cat: small lemur having its tail barred with black
madrepore: corals having calcareous skeletons aggregations of which form reefs and islands
maggot: the larva of the housefly and blowfly commonly found in decaying organic matter
Magicicada septendecim: North American cicada; appears in great numbers at infrequent intervals because the nymphs take 13 to 17 years to mature
magpie: long-tailed black-and-white crow that utters a raucous chattering call
Makaira albida: small marlin (to 180 pounds) of western Atlantic
Makaira marlina: large game fish in the Pacific Ocean; may reach 1000 pounds
Makaira mitsukurii: Pacific food and game fish marked with dark blue vertical stripes
Makaira nigricans: largest marlin; may reach 2000 pounds; found worldwide in warm seas
mako: powerful mackerel shark of the Atlantic and Pacific
Malaclemys centrata: of marshes along Atlantic and Gulf Coasts of United States
malacopterygian: any fish of the superorder Malacopterygii
Malacosoma americana: moth whose larvae are tent caterpillars
Malacosoma disstria: moth whose gregarious larvae spin webs resembling carpets
Malacosoma disstria: larvae of a gregarious North American moth that spins a web resembling a carpet rather than a tent; serious defoliator of deciduous trees
malacostracan crustacean: a major subclass of crustaceans
malaria mosquito: transmits the malaria parasite
male: an animal that produces gametes (spermatozoa) that can fertilize female gametes (ova)
male horse: the male of species Equus caballus
malinois: fawn-colored short-haired sheepdog
mallee hen: adult female mallee fowl
Malopterurus electricus: freshwater catfish of the Nile and tropical central Africa having an electric organ
Maltese cat: a term applied indiscriminately in the United States to any short-haired bluish-grey cat
Maltese terrier: breed of toy dogs having a long straight silky white coat
mamba: arboreal snake of central and southern Africa whose bite is often fatal
mammal: any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk
mammoth: any of numerous extinct elephants widely distributed in the Pleistocene; extremely large with hairy coats and long upcurved tusks
Mammuthus columbi: a variety of mammoth
Mammuthus primigenius: very hairy mammoth common in colder portions of the northern hemisphere
mamo: black honeycreepers with yellow feathers around the tail; now extinct
manakin: any of numerous small bright-colored birds of Central America and South America having short bills and elaborate courtship behavior
Manchester terrier: a breed of short-haired rat terrier with a black-and-tan coat that was developed in Manchester, England
Mandrillus leucophaeus: similar to the mandrill but smaller and less brightly colored
Mandrillus sphinx: baboon of west Africa with a bright red and blue muzzle and blue hindquarters
Manduca quinquemaculata: moth whose larvae are tomato hornworms
Manduca quinquemaculata: large green white-striped hawkmoth larva that feeds on tomato and potato plants; similar to tobacco hornworm
Manduca sexta: moth whose larvae are tobacco hornworms
Manduca sexta: large green white-striped hawkmoth larva that feeds on tobacco and related plants; similar to tomato hornworm
mangabey: large agile arboreal monkey with long limbs and tail and white upper eyelids
maniraptor: advanced carnivorous theropod
Manta birostris: largest manta (to 22 feet across wings); found worldwide but common in Gulf of Mexico and along southern coasts of United States; primarily oceanic
mantid: predacious long-bodied large-eyed insect of warm regions; rests with forelimbs raised as in prayer
mantis crab: tropical marine burrowing crustaceans with large grasping appendages
mantis prawn: a kind of mantis shrimp
Mantis religioso: the common mantis
mantispid: insect that resembles a mantis; larvae are parasites in the nests of spiders and wasps
Manx cat: a short-haired tailless breed of cat believed to originate on the Isle of Man
maori hen: flightless New Zealand rail of thievish disposition having short wings each with a spur used in fighting
mapinguari: supposed human-sized sloth-like creature reportedly sighted by Indians in the Amazon rain forest
Marco Polo's sheep: Asiatic wild sheep with exceptionally large horns; sometimes considered a variety of the argali (or Ovis ammon)
marine animal: any of numerous animals inhabiting the sea including e.g. fishes and molluscs and many mammals
marine mussel: marine bivalve mollusk having a dark elongated shell; live attached to solid objects especially in intertidal zones
marine turtle: any of various large turtles with limbs modified into flippers; widely distributed in warm seas
marlin: large long-jawed oceanic sport fishes; related to sailfishes and spearfishes; not completely cold-blooded i.e. able to warm their brains and eyes
marmoset: small soft-furred South American and Central American monkey with claws instead of nails
marmot: stocky coarse-furred burrowing rodent with a short bushy tail found throughout the northern hemisphere; hibernates in winter
Marmota caligata: large North American mountain marmot
Marmota flaviventris: heavy-bodied yellowish-brown marmot of rocky areas of western North America
Marmota monax: reddish brown North American marmot
marsh wren: a wren of the genus Cistothorus that frequents marshes
marsupial mouse: any of numerous small sharp-nosed insectivorous marsupials superficially resembling mice or rats
marsupial: mammals of which the females have a pouch (the marsupium) containing the teats where the young are fed and carried
marten: agile slender-bodied arboreal mustelids somewhat larger than weasels
Martes americana: valued for its fur
Martes foina: Eurasian marten having a brown coat with pale breast and throat
Martes martes: dark brown marten of northern Eurasian coniferous forests
Martes pennanti: large dark brown North American arboreal carnivorous mammal
Martes zibellina: marten of northern Asian forests having luxuriant dark brown fur
martin: any of various swallows with squarish or slightly forked tail and long pointed wings; migrate around Martinmas
Maryland yellowthroat: an American warbler
mason bee: any of numerous solitary bees that build nests of hardened mud and sand
mason wasp: solitary wasp that constructs nests of hardened mud or clay for the young
mason wasp: any of various solitary wasps that construct nests of hardened mud for their young
Masticophis bilineatus: both terrestrial and arboreal snake of United States southwest
Masticophis flagellum: a whipsnake of southern United States and Mexico; tail resembles a braided whip
Masticophis lateralis: a whipsnake of scrublands and rocky hillsides
mastiff: an old breed of powerful deep-chested smooth-coated dog used chiefly as a watchdog and guard dog
mastiff bat: a soft-furred chocolate-brown bat with folded ears and small wings; often runs along the ground
Mastigoproctus giganteus: large whip-scorpion of Mexico and southern United States that emits a vinegary odor when alarmed
mastodon: extinct elephant-like mammal that flourished worldwide from Miocene through Pleistocene times; differ from mammoths in the form of the molar teeth
Mastotermes darwiniensis: Australian termite; sole living species of Mastotermes; called a living fossil; apparent missing link between cockroaches and termites
Mastotermes electrodominicus: extinct termite found in amber in the Dominican Republic
Mastotermes electromexicus: an extinct termite found in amber in southern Mexico
mate: the partner of an animal (especially a sexual partner)
maverick: an unbranded range animal (especially a stray calf); belongs to the first person who puts a brand on it
Mayetiola destructor: small fly whose larvae damage wheat and other grains
mealworm: the larva of beetles of the family Tenebrionidae
mealy bug: scalelike plant-eating insect coated with a powdery waxy secretion; destructive especially of fruit trees
mecopteran: any of various carnivorous insects of the order Mecoptera
Mediterranean flour moth: small moth whose larvae damage stored grain and flour
Mediterranean fruit fly: small black-and-white fly that damages citrus and other fruits by implanting eggs that hatch inside the fruit
Mediterranean water shrew: a type of water shrew
medusa: one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles
meerkat: a mongoose-like viverrine of South Africa having a face like a lemur and only four toes
Megaderma lyra: large carnivorous Old World bat with very large ears
Megalobatrachus maximus: large (up to more than three feet) edible salamander of Asia
megalosaur: gigantic carnivorous bipedal dinosaur of the Jurassic or early Cretaceous in Europe
megapode: large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs
Megaptera novaeangliae: large whalebone whale with long flippers noted for arching or humping its back as it dives
megatherian: a large extinct ground sloth
Melanerpes erythrocephalus: black-and-white North American woodpecker having a red head and neck
Melanitta nigra: a variety of scoter
Melanogrammus aeglefinus: important food fish on both sides of the Atlantic; related to cod but usually smaller
Melanotis caerulescens: mockingbird of Mexico
Meleagris gallopavo: large gallinaceous bird with fan-shaped tail; widely domesticated for food
Mellivora capensis: nocturnal badger-like carnivore of wooded regions of Africa and southern Asia
Melolontha melolontha: any of various large European beetles destructive to vegetation as both larvae and adult
melolonthid beetle: any of various beetles of the family (or subfamily) Melolonthidae
Melophagus Ovinus: wingless fly that is an external parasite on sheep and cattle
Melopsittacus undulatus: small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors
Melospiza georgiana: North American finch of marshy area
Melospiza melodia: small songbird common in North America
Melursus ursinus: common coarse-haired long-snouted bear of south-central Asia
Menippe mercenaria: large edible crab of the southern coast of the United States (particularly Florida)
Menopon palladum: a louse parasitic on poultry
Menticirrhus americanus: whiting of the southeastern coast of North America
Menticirrhus littoralis: a dull silvery whiting of southern Atlantic and Gulf Coasts of the United States
Menticirrhus saxatilis: whiting of the east coast of United States; closely resembles king whiting
Menticirrhus undulatus: bluish-grey whiting of California coast
Mephitis macroura: of Mexico and southernmost parts of southwestern United States
Mephitis mephitis: most common and widespread North American skunk
Mercenaria mercenaria: an edible American clam; the heavy shells were used as money by some American Indians
Mergus albellus: smallest merganser and most expert diver; found in northern Eurasia
Mergus merganser: common merganser of Europe and North America
Mergus merganser americanus: common North American diving duck considered a variety of the European goosander
Mergus serrator: widely distributed merganser of America and Europe
merino: white sheep originating in Spain and producing a heavy fleece of exceptional quality
Meriones longifrons: southern European gerbil
Meriones unguiculatus: a gerbil that is popular as a pet
Merlangus merlangus: a food fish of the Atlantic waters of Europe resembling the cod; sometimes placed in genus Gadus
Merluccius bilinearis: found off Atlantic coast of North America
Mesocricetus auratus: small light-colored hamster often kept as a pet
mesohippus: North American three-toed Oligocene animal; probably not directly ancestral to modern horses
metatherian: primitive pouched mammals found mainly in Australia and the Americas
metazoan: any animal of the subkingdom Metazoa; all animals except protozoans and sponges
Mexican beaded lizard: lizard with black and yellowish beadlike scales; of western Mexico
Mexican hairless: any of an old breed of small nearly hairless dogs of Mexico
Mexican pocket mouse: large pocket mouse of Mexico
Mickey Mouse: a fictional mouse created in animated film strips by Walt Disney
Micromyx minutus: small reddish-brown Eurasian mouse inhabiting e.g. cornfields
Micropogonias undulatus: a silvery-bodied croaker with dark markings and tiny barbels
Micropterus dolomieu: a variety of black bass; the angle of the jaw falls below the eye
Micropterus pseudoplites: a variety of black bass
Micropterus salmoides: a large black bass; the angle of the jaw falls behind the eye
Microstomus kitt: European flatfish highly valued as food
Microtus ochrogaster: typical vole of the extended prairie region of central United States and southern Canada
Microtus pennsylvaticus: widely distributed in grasslands of northern United States and Canada
Microtus richardsoni: of western North America
Micruroides euryxanthus: ranges from Central America to southwestern United States
Micrurus fulvius: ranges from Central America to southeastern United States
midge: minute two-winged mosquito-like fly lacking biting mouthparts; appear in dancing swarms especially near water
Mighty Mouse: a fictional mouse endowed with great strength and courage
migrator: an animal (especially birds and fish) that travels between different habitats at particular times of the year
migratory grasshopper: serious pest of grain-growing and range areas of central and western United States
milking shorthorn: breed evolved from shorthorn beef cattle
millepede: any of numerous herbivorous nonpoisonous arthropods having a cylindrical body of 20 to 100 or more segments most with two pairs of legs
miller's-thumb: small freshwater sculpin of Europe and North America
miller: any of various moths that have powdery wings
Milvus migrans: dark Old World kite feeding chiefly on carrion
Mimus polyglotktos: long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds
mina: tropical Asian starlings
miniature pinscher: small German version of a Doberman pinscher
miniature poodle: a breed of small poodles
miniature schnauzer: a small schnauzer
mink: slender-bodied semiaquatic mammal having partially webbed feet; valued for its fur
Minnie Mouse: the partner of Mickey Mouse
mirror carp: domestic carp with some large shining scales
mite: any of numerous very small to minute arachnids often infesting animals or plants or stored foods
moa: extinct flightless bird of New Zealand
Mobula hypostoma: small manta (to 4 feet) that travels in schools
mocking thrush: thrush-like American songbird able to mimic other birdsongs
mojarra: small silvery schooling fishes with protrusible mouths found in warm coastal waters
moke: British informal for donkey
Mola lanceolata: caudal fin has a central projection
mole: small velvety-furred burrowing mammal having small eyes and fossorial forefeet
mole cricket: digs in moist soil and feeds on plant roots
mole rat: furry short-limbed tailless rodent resembling a true mole in habits and appearance; of eastern Europe and Middle East
mole rat: African rodent resembling a mole in habits and appearance
mollie: popular aquarium fish
mollusc: invertebrate having a soft unsegmented body usually enclosed in a shell
moloch: any lizard of the genus Moloch
Moloch horridus: desert lizard that feeds on ants
molter: an animal (especially birds and arthropods and reptiles) that periodically shed their outer layer (feathers or cuticle or skin or hair)
Molva molva: elongated marine food fish of Greenland and northern Europe; often salted and dried
momot: tropical American bird resembling a blue jay and having greenish and bluish plumage
monal: brilliantly colored pheasant of southern Asia
mongoose: agile grizzled Old World viverrine; preys on snakes and rodents
monitor: any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles
monkey: any of various long-tailed primates (excluding the prosimians)
Monodon monoceros: small Arctic whale the male having a long spiral ivory tusk
Monomorium minimum: tiny glossy black ant; nests outdoors but invades houses for food
Monomorium pharaonis: small red ant of warm regions; a common household pest
Mononychus olecranus: a turkey-sized long-legged fossil 75 million years old found in the Gobi Desert having bird-like fused wrist bones and keeled breastbone and a long tail resembling a dinosaur's; short forelimbs end in a single claw instead of wings; classification as bird or dinosaur is in dispute
monoplane flying fish: having only pectoral fins enlarged
monster: (medicine) a grossly malformed and usually nonviable fetus
Montagu's harrier: brownish European harrier
moon shell: marine gastropods having smooth rounded shells that form short spires
moorcock: male red grouse
moorhen: female red grouse
moray: family of brightly colored voracious eels of warm coastal waters; generally nonaggressive to humans but larger species are dangerous if provoked
Morelia spilotes variegatus: Australian python with a variegated pattern on its back
Morgan: an American breed of small compact saddle horses
Morlett's crocodile: a variety of crocodile
Morone americana: small silvery food and game fish of eastern United States streams
Morone interrupta: North American freshwater bass resembling the larger marine striped bass
morula: a solid mass of blastomeres that forms when the zygote splits; develops into the blastula
Moschus moschiferus: small heavy-limbed upland deer of central Asia; male secretes valued musk
mosquito: two-winged insect whose female has a long proboscis to pierce the skin and suck the blood of humans and animals
moth: typically crepuscular or nocturnal insect having a stout body and feathery or hairlike antennae
Mother Carey's chicken: medium-sized storm petrel
mother hen: a hen with chicks
mount: a lightweight horse kept for riding only
mountain chinchilla: a rodent native to the mountains of Chile and Peru and now bred in captivity
mountain paca: rodent of mountains of western South America
mountain sheep: any wild sheep inhabiting mountainous regions
mouse: any of numerous small rodents typically resembling diminutive rats having pointed snouts and small ears on elongated bodies with slender usually hairless tails
mouse-eared bat: a carnivorous bat with ears like a mouse
mouser: a cat proficient at mousing
mouthbreeder: any of various fishes that carry their eggs and their young in their mouths
mud dauber: wasp that constructs mud cells on a solid base in which females place eggs laid in paralyzed insect larvae
mud turtle: bottom-dwelling freshwater turtle inhabiting muddy rivers of North America and Central America
mudder: a racehorse that runs well on a muddy racetrack
mudskipper: found in tropical coastal regions of Africa and Asia; able to move on land on strong pectoral fins
Mugil cephalus: most important commercial mullet in eastern United States
Mugil curema: silvery mullet of Atlantic and Pacific coasts
Mugil liza: similar to the striped mullet and takes its place in the Caribbean region
muishond: southern African weasel
mule: hybrid offspring of a male donkey and a female horse; usually sterile
mullet: bottom dwelling marine warm water fishes with two barbels on the chin
Mulloidichthys martinicus: schooling goatfish; greyish with yellow stripe
Mullus auratus: body bright scarlet with 2 yellow to reddish strips on side
Mullus surmuletus: brightly colored tropical fishes with chin barbels
murine: a rodent that is a member of the family Muridae
murre: black-and-white diving bird of northern seas
Mus musculus: brownish-grey Old World mouse now a common household pest worldwide
Musca domestica: common fly that frequents human habitations and spreads many diseases
Muscardinus avellanarius: a variety of dormouse
Muscicapa striata: common European woodland flycatcher with greyish-brown plumage
Muscivora-forficata: grey flycatcher of the southwestern United States and Mexico and Central America having a long forked tail and white breast and salmon and scarlet markings
mushroom coral: flattened disk-shaped stony coral (usually solitary and unattached)
musk hog: nocturnal gregarious pig-like wild animals of North America and South America
musk turtle: small freshwater turtle having a strong musky odor
mussel: marine or freshwater bivalve mollusk that lives attached to rocks etc.
mussel shrimp: tiny marine and freshwater crustaceans with a shrimp-like body enclosed in a bivalve shell
mustang: small hardy range horse of the western plains descended from horses brought by the Spanish
Mustela erminea: mustelid of northern hemisphere in its white winter coat
Mustela frenata: the common American weasel distinguished by large size and black-tipped tail
Mustela nigripes: musteline mammal of prairie regions of United States; nearly extinct
Mustela putorius: dark brown mustelid of woodlands of Eurasia that gives off an unpleasant odor when threatened
Mustela vison: usually rich dark brown
mustelid: fissiped fur-bearing carnivorous mammals
Mustelus mustelus: smooth dogfish of European coastal waters
mutant: an animal that has undergone mutation
Mya arenaria: an edible clam with thin oval-shaped shell found in coastal regions of the United States and Europe
Mycteria americana: an American stork that resembles the true ibises in having a downward-curved bill; inhabits wooded swamps of New World tropics
Mycteroperca bonaci: large dark grouper with a thick head and rough scales
mylodon: large (bear-sized) extinct edentate mammal of the Pleistocene in South America
mylodontid: a variety of extinct edentate
Myocastor coypus: aquatic South American rodent resembling a small beaver; bred for its fur
Myotis leucifugus: the small common North American bat; widely distributed
Myotis velifer: small bat of southwest United States that lives in caves etc.
myriapod: general term for any terrestrial arthropod having an elongated body composed of many similar segments: e.g. centipedes and millipedes
Myrmecobius fasciatus: small Australian marsupial having long snout and strong claws for feeding on termites; nearly extinct
Myrmecophaga jubata: large shaggy-haired toothless anteater with long tongue and powerful claws; of South America
Mytilus edulis: a mussel with a dark shell that lives attached to rocks
Myxine glutinosa: typical hagfish
Myxinikela siroka: fossil hagfish of the Pennsylvanian period (c. 300 million years ago) that resembled modern hagfishes
Myxocephalus aenaeus: small sculpin of the coast of New England
Naemorhedus goral: small goat antelope with small conical horns; of southern Asian mountains
nail-tailed kangaroo: small wallabies with a horny nail on the tip of the tail
Naja nigricollis: aggressive cobra widely distributed in Africa; rarely bites but spits venom that may cause blindness
naked mole rat: fetal-looking colonial rodent of East Africa; neither mole nor rat; they feed on tubers and have a social structure similar to that of honeybees and termites
nanny: female goat
nanomia: small creatures resembling pieces of fuzzy rope; each with a cluster of swimming bells serving as the head and long elastic tentacles for drawing in prey
Nasalis larvatus: Borneo monkey having a long bulbous nose
Nasua narica: omnivorous mammal of Central America and South America
Natrix maura: a small harmless grass snake
Natrix natrix: harmless European snake with a bright yellow collar; common in England
Naucrates ductor: small pelagic fish often accompanying sharks or mantas
Necturus maculosus: aquatic North American salamander with red feathery external gills
needlefish: fish with long tubular snout and slim body covered with bony plates
Negaprion brevirostris: common shallow-water schooling shark of the Atlantic from North Carolina to Brazil and off west Africa; dangerous
nematode: unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic
nemertean: soft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contract
Neophron percnopterus: small mostly white vulture of Africa and southern Eurasia
Neotoma cinerea: any of several bushy-tailed rodents of the genus Neotoma of western North America; hoards food and other objects
Neotoma floridana: large greyish-brown wood rat of the southeastern United States
Neotoma fuscipes: host to Lyme disease tick (Ixodes pacificus) in northern California
Nephrops norvegicus: edible European lobster resembling the American lobster but slenderer
nerita: a neritid gastropod having a short smooth or spirally ridged shell with thick usually toothed outer lip and toothed operculum
Nerita peloronta: gastropod having reddish toothlike projections around the shell opening; of the Caribbean area
neritid: operculate seasnail of coastal waters with a short spiral shell
neritina: ornately marked and brightly colored snails of brackish waters
Nerodia sipedon: in some classifications placed in the genus Nerodia; western United States snake that seldom ventures far from water
nester: a bird that has built (or is building) a nest
Nestor notabilis: large brownish-green New Zealand parrot
neuropteran: insect having biting mouthparts and four large membranous wings with netlike veins
Neurotrichus gibbsii: greyish-black shrew mole of the United States and Canada
New World anteater: any of several tropical American mammals of the family Myrmecophagidae which lack teeth and feed on ants and termites
New World blackbird: any bird of the family Icteridae whose male is black or predominantly black
New World chat: birds having a chattering call
New World coral snake: any of several venomous New World snakes brilliantly banded in red and black and either yellow or white; widely distributed in South America and Central America
New World flycatcher: large American birds that characteristically catch insects on the wing
New World goldfinch: American finch whose male has yellow body plumage in summer
New World jay: a North American jay
New World least weasel: of Canada and northeastern United States
New World monkey: hairy-faced arboreal monkeys having widely separated nostrils and long usually prehensile tails
New World mouse: a variety of rodent
New World oriole: American songbird; male is black and orange or yellow
New World porcupine: arboreal porcupine
New World sparrow: sparrow-like North American finches
New World vulture: large birds of prey superficially similar to Old World vultures
New World warbler: small bright-colored American songbird with a weak unmusical song
New Zealand wren: birds of New Zealand that resemble wrens
Newfoundland dog: a breed of very large heavy dogs with a thick coarse usually black coat; highly intelligent dogs and vigorous swimmers; developed in Newfoundland
newt: small usually bright-colored semiaquatic salamanders of North America and Europe and northern Asia
night bird: any bird associated with night: owl; nightingale; nighthawk; etc
night heron: nocturnal or crepuscular herons
night lizard: small secretive nocturnal lizard of southwestern North America and Cuba; bear live young
night raven: any bird that cries at night
noctuid: usually dull-colored medium-sized nocturnal moth; the usually smooth-bodied larvae are destructive agricultural pests
Nomia melanderi: a common solitary bee important for pollinating alfalfa in the western United States
nonpasserine bird: chiefly arboreal birds especially of the order Coraciiformes
nonstarter: a horse that fails to run in a race for which it has been entered
Norfolk terrier: English breed of small terrier with a straight wiry grizzled coat and dropped ears
northern snakehead: a voracious freshwater fish that is native to northeastern China; can use fin to walk and can survive out of water for three days; a threat to American populations of fish
Norwegian elkhound: breed of compact medium-sized dog with a heavy grey coat developed in Norway for hunting elk
Norwich terrier: English breed of small short-legged terrier with a straight wiry red or grey or black-and-tan coat and erect ears
Notechis scutatus: highly venomous brown-and-yellow snake of Australia and Tasmania
Notemigonus crysoleucas: shiner of eastern North America having golden glints; sometimes also called `bream'
nothosaur: extinct marine reptile with longer more slender limbs than plesiosaurs and less completely modified for swimming
Notonecta undulata: predaceous aquatic insect that swims on its back and may inflict painful bites
Notophthalmus viridescens: red terrestrial form of a common North American newt
Notornis mantelli: flightless New Zealand birds similar to gallinules
Notoryctus typhlops: small burrowing Australian marsupial that resembles a mole
Notropis atherinoides: small blunt-nosed fish of Great Lakes and Mississippi valley with a greenish luster
Notropis cornutus: the common North American shiner
Nucifraga caryocatactes: Old World nutcracker
Nucifraga columbiana: nutcracker of the western United States
nude mouse: a mouse with a genetic defect that prevents them from growing hair and also prevents them from immunologically rejecting human cells and tissues; widely used in preclinical trials
nudibranch: any of various marine gastropods of the suborder Nudibranchia having a shell-less and often beautifully colored body
Numenius arquata: common Eurasian curlew
Numenius borealis: New World curlew that breeds in northern North America
Numida meleagris: a west African bird having dark plumage mottled with white; native to Africa but raised for food in many parts of the world
nutcracker: speckled birds that feed on nuts
nutcracker: any of various small short-tailed songbirds with strong feet and a sharp beak that feed on small nuts and insects
Nyctanassa violacea: North American night heron
Nyctereutes procyonides: small wild dog of eastern Asia having facial markings like those of a raccoon
Nycticebus tardigradua: stocky lemur of southeastern Asia
Nycticorax nycticorax: night heron of both Old and New Worlds
nymph: a larva of an insect with incomplete metamorphosis (as the dragonfly or mayfly)
Nymphalis antiopa: of temperate regions; having dark purple wings with yellow borders
Nymphicus hollandicus: small grey Australian parrot with a yellow crested head
oak blight: a black plant louse that lives on oaks and dogwoods
oceanic bird: bird of the open seas
Ochotona collaris: similar to little chief hare and may be same species
Ochotona princeps: North American pika
octopod: a cephalopod with eight arms but lacking an internal shell
Ocyurus chrysurus: superior food fish of the tropical Atlantic and Caribbean with broad yellow stripe along the sides and on the tail
odd-toed ungulate: placental mammals having hooves with an odd number of toes on each foot
Odobenus divergens: a walrus of the Bering Sea and northern Pacific
Odobenus rosmarus: a walrus of northern Atlantic and Arctic waters
Odocoileus hemionus: long-eared deer of western North America with two-pronged antlers
Odocoileus hemionus columbianus: mule deer of western Rocky Mountains
Odocoileus Virginianus: common North American deer; tail has a white underside
odonate: large primitive predatory aquatic insect having two pairs of membranous wings
Odontaspis taurus: shallow-water shark with sharp jagged teeth found on both sides of Atlantic; sometimes dangerous to swimmers
Oecanthus fultoni: pale yellowish tree cricket widely distributed in North America
Oestrus ovis: larvae are parasitic on sheep
offspring: any immature animal
oil beetle: any of various beetles that exude an oily substance from the leg joints that deters enemies
Okapia johnstoni: similar to the giraffe but smaller with much shorter neck and stripe on the legs
Old English sheepdog: large sheepdog with a profuse shaggy bluish-grey-and-white coat and short tail; believed to trace back to the Roman occupation of Britain
Old World beaver: a European variety of beaver
Old World buffalo: any of several Old World animals resembling oxen including, e.g., water buffalo; Cape buffalo
Old World chat: songbirds having a chattering call
Old World coot: a coot found in Eurasia
Old World coral snake: any of various venomous elapid snakes of Asia and Africa and Australia
Old World crayfish: small crayfish of Europe and Asia and western North America
Old World flycatcher: any of a large group of small songbirds that feed on insects taken on the wing
Old World jay: a European jay
Old World least weasel: of Europe
Old World monkey: of Africa or Arabia or Asia; having nonprehensile tails and nostrils close together
Old World oriole: mostly tropical songbird; the male is usually bright orange and black
Old World porcupine: terrestrial porcupine
Old World quail: small game bird with a rounded body and small tail
Old World scops owl: European scops owl
Old World vulture: any of several large vultures of Africa and Eurasia
Old World warbler: small active brownish or greyish Old World birds
Old world white pelican: similar to American white pelican
oligochaete: hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body
Omaha: thoroughbred that won the triple crown in 1935
ommastrephes: extremely active cylindrical squid with short strong arms and large rhombic terminal fins
omnivore: an animal that feeds on both animal and vegetable substances
Oncorhynchus keta: a large Pacific salmon with small spots on its back; an important food fish
Oncorhynchus kisutch: small salmon of northern Pacific coasts and the Great Lakes
Oncorhynchus nerka: small salmon with red flesh; found in rivers and tributaries of the northern Pacific and valued as food; adults die after spawning
Oncorhynchus tshawytscha: large Pacific salmon valued as food; adults die after spawning
Ondatra zibethica: beaver-like aquatic rodent of North America with dark glossy brown fur
onychophoran: any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms
openbill: stork with a grooved bill whose upper and lower parts touch only at the base and tip
Opheodrys aestivus: of southern and eastern United States
Opheodrys vernalis: of western and central United States
ophidian: limbless scaly elongate reptile; some are venomous
Ophiodon elongatus: food fish of the northern Pacific related to greenlings
Ophiophagus hannah: large cobra of southeastern Asia and the East Indies; the largest venomous snake; sometimes placed in genus Naja
Opisthocomus hoazin: crested ill-smelling South American bird whose young have claws on the first and second digits of the wings
opossum rat: terrestrial marsupials of southern South America that resemble shrews
opossum shrimp: shrimp-like crustaceans whose females carry eggs and young in a pouch between the legs
opossum: small furry Australian arboreal marsupials having long usually prehensile tails
opossum: nocturnal arboreal marsupial having a naked prehensile tail found from southern North America to northern South America
Opsanus tau: bottom-dwelling fish having scaleless slimy skin and a broad thick head with a wide mouth
orb-weaving spider: a spider that spins a circular (or near circular) web
Orcinus orca: predatory black-and-white toothed whale with large dorsal fin; common in cold seas
Ord kangaroo rat: most widely distributed kangaroo rat: plains and mountain areas of central and western United States
order Accipitriformes: in some classifications an alternative name for the Falconiformes
order Ostariophysi: in some classifications considered a superorder comprising the Cypriniformes and the Siluriformes
Orectolobus barbatus: shark of the western Pacific with flattened body and mottled skin
Oreortyx picta palmeri: California partridge; slightly larger than the California quail
Oriental scops owl: Asian scops owl
Oriolus oriolus: bright yellow songbird with black wings
ornithischian: herbivorous dinosaur with a pelvis like that of a bird
ornithomimid: lightly built medium-sized dinosaur having extremely long limbs and necks with small heads and big brains and large eyes
ornithopod: bipedal herbivorous dinosaur
Ornithorhynchus anatinus: small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
orphan: a young animal without a mother
Orpington: English breed of large chickens with white skin
Orthopristis chrysopterus: found from Long Island southward
orthopteran: any of various insects having leathery forewings and membranous hind wings and chewing mouthparts
Orthotomus sutorius: tropical Asian warbler that stitches leaves together to form and conceal its nest
Ortilis vetula macalli: of Mexico and Texas
ortygan: any of several East Indian birds
Orycteropus afer: nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata
Oryctolagus cuniculus: common greyish-brown burrowing animal native to southern Europe and northern Africa but introduced elsewhere; widely domesticated and developed in various colors and for various needs; young are born naked and helpless
Oryx gazella: large South African oryx with a broad black band along its flanks
oryx: large African antelope with long straight nearly upright horns
Oryzomys palustris: hardy agile rat of grassy marshes of Mexico and the southeastern United States
oscine: passerine bird having specialized vocal apparatus
Osmerus eperlanus: the common smelt of Europe
Osmerus mordax: important marine and landlocked food fish of eastern North America and Alaska
ostracoderm: extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic
Otis tarda: largest European land bird
otter: freshwater carnivorous mammal having webbed and clawed feet and dark brown fur
otter hound: hardy British hound having long pendulous ears and a thick coarse shaggy coat with an oily undercoat; bred for hunting otters
Otus asio: small North American owl having hornlike tufts of feathers whose call sounds like a quavering whistle
Ovalipes ocellatus: brightly spotted crab of sandy beaches of the Atlantic coast of the United States
ovenbird: small brownish South American birds that build oven-shaped clay nests
Ovibos moschatus: large shaggy-coated bovid mammal of Canada and Greenland; intermediate in size and anatomy between an ox and a sheep
oviraptorid: advanced carnivorous theropod
Ovis ammon: wild sheep of semidesert regions in central Asia
Ovis aries: any of various breeds raised for wool or edible meat or skin
Ovis montana dalli: large white wild sheep of northwestern Canada and Alaska
Ovis musimon: wild mountain sheep of Corsica and Sardinia
Ovis vignei: bearded reddish sheep of southern Asia
owlet: young owl
ox: an adult castrated bull of the genus Bos; especially Bos taurus
ox: any of various wild bovines especially of the genera Bos or closely related Bibos
Oxylebius pictus: greenling with whitish body marked with black bands
Oxyura jamaicensis: reddish-brown stiff-tailed duck of North America and northern South America
Oxyuranus scutellatus: large highly venomous snake of northeastern Australia
oyster: marine mollusks having a rough irregular shell; found on the sea bed mostly in coastal waters
oyster catcher: black-and-white shorebird with stout legs and bill; feed on oysters etc.
oyster fish: a variety of toadfish
pacemaker: a horse used to set the pace in racing
pacer: a horse trained to a special gait in which both feet on one side leave the ground together
pachycephalosaur: bipedal herbivore having 10 inches of bone atop its head; largest boneheaded dinosaur ever found
pachyderm: any of various nonruminant hoofed mammals having very thick skin: elephant; rhinoceros; hippopotamus
Pacific bottlenose dolphin: a bottlenose dolphin found in the Pacific Ocean
Pacific giant salamander: large (to 7 inches) salamander of western North America
Pacific newt: any of several rough-skinned newts found in western North America
Pacific spiny dogfish: dogfish of Pacific coast of North America
Pacific tree toad: the most commonly heard frog on the Pacific coast of America
Pacific tripletail: tripletail found in the Pacific
pack animal: an animal (such as a mule or burro or horse) used to carry loads
packhorse: a workhorse used as a pack animal
Padda oryzivora: small finch-like Indonesian weaverbird that frequents rice fields
paddymelon: small reddish-brown wallabies of scrubby areas of Australia and New Guinea
Pagellus centrodontus: food fish of European coastal waters
Pagophila eburnea: white Arctic gull; migrates as far south as England and New Brunswick
Pagophilus groenlandicus: common Arctic seal; the young are all white
Pagrus pagrus: food fish of the Mediterranean and Atlantic coasts of Europe and America
Palaemon australis: large (a foot or more) edible freshwater prawn common in Australian rivers
pale chrysanthemum aphid: important pest of chrysanthemums
Paleacrita vernata: moth whose larvae are spring cankerworms
palfrey: especially a light saddle horse for a woman
Pallas's cat: small wildcat of the mountains of Siberia and Tibet and Mongolia
palm cat: spotted or striped arboreal civet of southeast Asia and East Indies
Palometa simillima: smaller than Florida pompano; common in West Indies
palomino: a horse of light tan or golden color with cream-colored or white mane and tail
Pan paniscus: small chimpanzee of swamp forests in Zaire; a threatened species
Pan troglodytes: intelligent somewhat arboreal ape of equatorial African forests
Pan troglodytes schweinfurthii: long-haired chimpanzees of east-central Africa; closely related to the central chimpanzees
Pan troglodytes troglodytes: black-faced chimpanzees of central Africa; closely related to eastern chimpanzees
Pan troglodytes verus: masked or pale-faced chimpanzees of western Africa; distantly related to the eastern and central chimpanzees; possibly a distinct species
pancake turtle: voracious aquatic turtle with a flat flexible shell covered by a leathery skin; can inflict painful bites
Pandion haliaetus: large harmless hawk found worldwide that feeds on fish and builds a bulky nest often occupied for years
Panonychus ulmi: small web-spinning mite; a serious orchard pest
panther: a leopard in the black color phase
Panthera leo: large gregarious predatory feline of Africa and India having a tawny coat with a shaggy mane in the male
Panthera onca: a large spotted feline of tropical America similar to the leopard; in some classifications considered a member of the genus Felis
Panthera pardus: large feline of African and Asian forests usually having a tawny coat with black spots
Panthera tigris: large feline of forests in most of Asia having a tawny coat with black stripes; endangered
Panthera uncia: large feline of upland central Asia having long thick whitish fur
paper wasp: any of several social wasps that construct nests of a substance like paper
papillon: small slender toy spaniel with erect ears and a black-spotted brown to white coat
Papio ursinus: greyish baboon of southern and eastern Africa
Paprilus alepidotus: butterfish up to a foot long of Atlantic waters from Chesapeake Bay to Argentina
Paracheirodon axelrodi: small bright red and blue aquarium fish from streams in Brazil and Colombia
parakeet: any of numerous small slender long-tailed parrots
Paralichthys dentatus: flounder of eastern coast of North America
Paralichthys lethostigmus: flounder of southern United States
Paralithodes camtschatica: large edible crab of northern Pacific waters especially along the coasts of Alaska and Japan
Paranthias furcifer: deep-sea fish of tropical Atlantic
Parascalops breweri: mole of eastern North America
parazoan: primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies
pariah dog: ownerless half-wild mongrel dog common around Asian villages especially India
Parophrys vitulus: popular pale brown food flatfish of the Pacific coast of North America
parr: a young salmon up to 2 years old
parr: the young of various fishes
parrot: usually brightly colored zygodactyl tropical birds with short hooked beaks and the ability to mimic sounds
parrotfish: gaudy tropical fishes with parrotlike beaks formed by fusion of teeth
partridge: small Old World gallinaceous game birds
partridge: heavy-bodied small-winged South American game bird resembling a gallinaceous bird but related to the ratite birds
Parula americana: small grey-blue wood warbler with yellow throat and breast; of eastern North America
Parus atricapillus: chickadee having a dark crown
Parus bicolor: crested titmouse of eastern and midwestern United States
Parus caeruleus: widely distributed European titmouse with bright cobalt blue wings and tail and crown of the head
Parus carolinensis: southern United States chickadee similar to the blackcap but smaller
Passer domesticus: small hardy brown-and-grey bird native to Europe
Passer montanus: Eurasian sparrow smaller than the house sparrow
passeriform bird: perching birds mostly small and living near the ground with feet having 4 toes arranged to allow for gripping the perch; most are songbirds; hatchlings are helpless
Passerina cyanea: small deep blue North American bunting
Pastor sturnus: glossy black bird with pink back and abdomen; chiefly Asian
Patella vulgata: marine limpet
Pavo cristatus: peafowl of India and Ceylon
Pavo muticus: peafowl of southeast Asia
pea crab: tiny soft-bodied crab living commensally in the mantles of certain bivalve mollusks
peachick: a young peafowl
peacock: male peafowl; having a crested head and very large fanlike tail marked with iridescent eyes or spots
peahen: female peafowl
peanut worm: small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut
pearlfish: found living within the alimentary canals of e.g. sea cucumbers or between the shells of pearl oysters in or near shallow seagrass beds
pearly-shelled mussel: the pearly lining of the dark shells is a source of mother-of-pearl
pecker: bird with strong claws and a stiff tail adapted for climbing and a hard chisel-like bill for boring into wood for insects
Pecten irradians: a small scallop inhabiting shallow waters and mud flats of the Atlantic coast of North America
Pecten magellanicus: a large scallop inhabiting deep waters of the Atlantic coast of North America
Pediculus capitis: infests the head and body of humans
Pediculus corporis: a parasitic louse that infests the body of human beings
Pediculus humanus: head or body louse
Pedioecetes phasianellus: large grouse of prairies and open forests of western North America
Pedionomus torquatus: small Australian bird related to the button quail; classified as wading bird but inhabits plains
peeper: an animal that makes short high-pitched sounds
Peking man: fossils found near Beijing, China; they were lost during World War II
Pekingese: a Chinese breed of small short-legged dogs with a long silky coat and broad flat muzzle
pelecaniform seabird: large fish-eating seabird with four-toed webbed feet
Pelecanus erythrorhynchos: large American pelican; white with black wing feathers
pelican: large long-winged warm-water seabird having a large bill with a distensible pouch for fish
pelycosaur: large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America
Pembroke Welsh corgi: the smaller and straight-legged variety of corgi having pointed ears and a short tail
pen: female swan
penguin: short-legged flightless birds of cold southern especially Antarctic regions having webbed feet and wings modified as flippers
pentail: brown tree shrew having a naked tail bilaterally fringed with long stiff hairs on the distal third; of Malaysia
pentastomid: wormlike arthropod having two pairs of hooks at the sides of the mouth; parasitic in nasal sinuses of mammals
Perca flavescens: North American perch
Perca fluviatilis: a perch native to Europe
perch: spiny-finned freshwater food and game fishes
perch: any of numerous spiny-finned fishes of various families of the order Perciformes
Percheron: one of a breed of grey or black draft horses originally used in France to draw heavy coaches or artillery
Percina tanasi: a small snail-eating perch of the Tennessee River
percoid: any of numerous spiny-finned fishes of the order Perciformes
Periplaneta americana: large reddish brown free-flying cockroach originally from southern United States but now widely distributed
Periplaneta australasiae: widely distributed in warm countries
Perisoreus canadensis: a jay of northern North America with black-capped head and no crest; noted for boldness in thievery
Perisoreus canadensis capitalis: a Canada jay with a white head; widely distributed from Montana to Arizona
Peristedion miniatum: sea robins having bony scutes on the body and barbels on the chin; found mostly on the continental slope
periwinkle: edible marine gastropod
Pernis apivorus: Old World hawk that feeds on bee larvae and small rodents and reptiles
Perodicticus potto: a kind of lemur
Perognathus flavescens: small rodent of open areas of United States plains states
Perognathus flavus: small pale yellowish soft-furred rodent of southwestern United States and Mexico
Perognathus hispidus: large stiff-haired rodent of shortgrass prairies of United States
Peromyscus eremicus: burrowing mouse of desert areas of southwestern United States
Peromyscus gossypinus: large dark mouse of southeastern United States
Peromyscus leucopus: American woodland mouse with white feet and underparts
Peromyscus maniculatus: brownish New World mouse; most widely distributed member of the genus
Persian cat: a long-haired breed of cat
Persian lamb: a karakul lamb
pest: any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.
pet: a domesticated animal kept for companionship or amusement
Petaurista petaurista: East Indian flying squirrel
petrel: relatively small long-winged tube-nosed bird that flies far from land
Petromyzon marinus: large anadromous lamprey sometimes used as food; destructive of native fish fauna in the Great Lakes
Pezophaps solitaria: extinct flightless bird related to the dodo
Phalacrocorax carbo: large voracious dark-colored long-necked seabird with a distensible pouch for holding fish; used in Asia to catch fish
Phalaenoptilus nuttallii: goatsucker of western North America
Phalangium opilio: spiderlike arachnid with a small rounded body and very long thin legs
phalarope: small sandpiper-like shorebird having lobate toes and being good swimmers; breed in the Arctic and winter in the tropics
Phalaropus fulicarius: phalarope of northern oceans and lakes
Pharomacrus mocino: very rare Central American bird; the national bird of Guatemala
Phascolarctos cinereus: sluggish tailless Australian arboreal marsupial with grey furry ears and coat; feeds on eucalyptus leaves and bark
phasianid: a kind of game bird in the family Phasianidae
Phasianus colchicus: common pheasant having bright plumage and a white neck ring
phasmid: large cylindrical or flattened mostly tropical insects with long strong legs that feed on plants; walking sticks and leaf insects
pheasant: large long-tailed gallinaceous bird native to the Old World but introduced elsewhere
phenacomys: any of several vole-like terrestrial or arboreal rodents of cold forested regions of Canada and western United States
Philaenus spumarius: North American insect that severely damages grasses
Philomachus pugnax: common Eurasian sandpiper; the male has an erectile neck ruff in breeding season
Phlebotomus papatasii: any of various small dipterous flies; bloodsucking females can transmit sandfly fever and leishmaniasis
Phoca vitulina: small spotted seal of coastal waters of the northern hemisphere
Phocoena phocoena: the common porpoise of the northern Atlantic and Pacific
Phocoena sinus: a short porpoise that lives in the Gulf of California; an endangered species
Pholis gunnellus: slippery scaleless food fish of the northern Atlantic coastal waters
phoronid: hermaphrodite wormlike animal living in mud of the sea bottom
Photoblepharon palpebratus: fish of deep dark waters having a light organ below each eye
Phoxinus phoxinus: very small European freshwater fish common in gravelly streams
Phthirius pubis: a louse that infests the pubic region of the human body
Phthorimaea operculella: greyish-brown moth whose larva is the potato tuberworm
Phthorimaea operculella: larva of potato moth; mines in leaves and stems of e.g. potatoes and tobacco
Phylloscopus sibilatrix: European woodland warbler with dull yellow plumage
Phyllostomus hastatus: a variety of leaf-nosed bat
Phylloxera vitifoleae: destructive to various grape plants
physa: any member of the genus Physa
Physeter catodon: large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergris
Pica pica hudsonia: a magpie of Rocky Mountains in North America
piciform bird: any of numerous nonpasserine insectivorous climbing birds usually having strong bills for boring wood
pickerel: any of several North American species of small pike
piculet: small woodpeckers of South America and Africa and East Indies having soft rounded tail feathers
Picus viridis: woodpecker of Europe and western Asia
piddock: marine bivalve that bores into rock or clay or wood by means of saw-like shells
pied lemming: North American lemming having a white winter coat and some claws much enlarged
pierid: any of numerous pale-colored butterflies having three pairs of well-developed legs
Pieris brassicae: Old World form of cabbage butterfly
Pieris protodice: common North American form of cabbage butterfly
Pieris rapae: small widely distributed form
Pieris rapae: toxic green larva of a cabbage butterfly
pigeon: wild and domesticated birds having a heavy body and short legs
piggy: a young pig
pike: any of several elongate long-snouted freshwater game and food fishes widely distributed in cooler parts of the northern hemisphere
pike perch: any of several pike-like fishes of the perch family
pikeblenny: tropical American fishes; males are aggressively defensive of their territory
pill bug: small terrestrial isopod with a convex segmented body that can roll up into a ball
Pinctada margaritifera: tropical marine bivalve found chiefly off eastern Asia and Pacific coast of North America and Central America; a major source of pearls
pine sawyer: large beetle whose larvae bore holes in pine trees
pine snake: any of several bull snakes of eastern and southeastern United States found chiefly in pine woods; now threatened
pine spittlebug: North American insect that attacks pines
Pineus pinifoliae: a variety of adelgid
Pinguinus impennis: large flightless auk of rocky islands off northern Atlantic coasts; extinct
Pinicola enucleator: large grosbeak of coniferous forests of Old and New Worlds
pinnatiped: aquatic carnivorous mammal having a streamlined body specialized for swimming with limbs modified as flippers
Pinnotheres ostreum: tiny soft-bodied crab living within the mantle cavity of oysters
pinscher: any of three breeds of dogs whose ears and tail are usually cropped
pinto: a spotted or calico horse or pony
Pipa americana: a South American toad; incubates its young in pits in the skin of its back
Pipilo erythrophthalmus: common towhee of eastern North America
piping guan: a kind of guan
Pipistrellus pipistrellus: small European brown bat
Pipistrellus subflavus: one of the smallest bats of eastern North America
Piranga flava hepatica: common tanager of southwestern United States and Mexico
Piranga ludoviciana: of western North America; male is black and yellow and orange-red
Piranga olivacea: the male is bright red with black wings and tail
Piranga rubra: of middle and southern United States; male is deep rose-red the female mostly yellow
pisanosaur: primitive dinosaur found in Argentina
pistol shrimp: small shrimp that makes a snapping noise with one of their enlarged chelae
pit viper: New World vipers with hollow fangs and a heat-sensitive pit on each side of the head
Pithecanthropus erectus: former genus of primitive apelike men now Homo erectus
pitta: any bird of the genus Pitta; brilliantly colored chiefly terrestrial birds with short wings and tail and stout bills
Pituophis melanoleucus: bull snake of western North America that invades rodent burrows
Pitymys pinetorum: short-tailed glossy-furred burrowing vole of the eastern United States
placoderm: fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws
Placuna placenta: marine bivalve common in Philippine coastal waters characterized by a large thin flat translucent shell
planaria: free-swimming mostly freshwater flatworms; popular in laboratory studies for the ability to regenerate lost parts
Planococcus citri: feeds on a wide variety of cultivated plants but especially destructive to citrus
plant hopper: related to the leafhoppers and spittlebugs but rarely damages cultivated plants
Plantation walking horse: a horse marked by stamina and trained to move at a fast running walk
plantigrade: an animal that walks with the entire sole of the foot touching the ground as e.g. bears and human beings
planula: the flat ciliated free-swimming larva of hydrozoan coelenterates
Platalea leucorodia: pure white crested spoonbill of southern Eurasia and northeastern Africa
Platichthys flesus: important food fish of Europe
platyctenean: ctenophore have long tentacles and flattened body
Platypoecilus maculatus: small stocky Mexican fish; popular aquarium fish
Plautus alle: small short-billed auk abundant in Arctic regions
plecopteran: primitive winged insect with a flattened body; used as bait by fishermen; aquatic gilled larvae are carnivorous and live beneath stones
Plecotus townsendi: bat of western North America having extremely large ears
plectognath: tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines
Plectophera: in some former classifications: name for the Ephemeroptera
Plectrophenax nivalis: white Arctic bunting
plesiosaur: extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous
Plethodon cinereus: common salamander of eastern North America
Plethodon vehiculum: salamander of the Pacific coast of North America
pleurodont: an animal having teeth fused with the inner surface of the alveolar ridge without sockets
Pleuronectes platessa: large European food fish
Plicatoperipatus jamaicensis: a kind of onychophoran
Ploceus philippinus: common Indian weaverbird
Plott hound: a brindle-coated American hound used in hunting bears and wild boars
plough horse: a horse used to pull a plow
plover: any of numerous chiefly shorebirds of relatively compact build having straight bills and large pointed wings; closely related to the sandpipers
Pluvianus aegyptius: African courser that feeds on insect parasites on crocodiles
Plymouth Rock: an American breed of domestic fowl
poacher: small slender fish (to 8 inches) with body covered by bony plates; chiefly of deeper northern Pacific waters
pocket mouse: any of various small nocturnal burrowing desert rodents with cheek pouches and long hind legs and tail
pocket rat: any of various rodents with cheek pouches
Podiceps cristatus: large Old World grebe with black ear tufts
Podiceps grisegena: large stocky grebe of circumpolar regions having a dark neck
Podiceps nigricollis: small grebe with yellow ear tufts and a black neck; found in Eurasia and southern Africa as well as western United States
Podiceps ruficollis: small European grebe
podicipitiform seabird: aquatic birds related to the loons
Podilymbus podiceps: American grebe having a black-banded whitish bill
Poecilocapsus lineatus: yellow or orange leaf bug with four black stripes down the back; widespread in central and eastern North America
Poecilogale albinucha: small slender burrowing muishond with white top of the head
Poephila castanotis: small Australian weaverbird with markings like a zebra's
pole horse: the horse having a starting position next to the inside rail in a harness race
pole horse: a draft horse harnessed alongside the shaft or pole of a vehicle
polecat: American musteline mammal typically ejecting an intensely malodorous fluid when startled; in some classifications put in a separate subfamily Mephitinae
police dog: any dog trained to assist police especially in tracking
Polistes annularis: a variety of paper wasp
poll: a tame parrot
Pollachius pollachius: important food and game fish of northern seas (especially the northern Atlantic); related to cod
pollard: a usually horned animal that has either shed its horns or had them removed
pollinator: an insect that carries pollen from one flower to another
polliwog: a larval frog or toad
polo pony: a small agile horse specially bred and trained for playing polo
Polyborus cheriway audubonii: widespread from southern United States to Central America; rusty black with black-and-white breast and tail
Polyborus plancus: South American caracara
polychaete: chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles
Polydactylus virginicus: found along western Atlantic coast
Polyergus rufescens: small reddish slave-making ant species
Polygonia comma: anglewing butterfly with a comma-shaped mark on the underside of each hind wing
Polyodon spathula: primitive fish of the Mississippi valley having a long paddle-shaped snout
polyp: one of two forms that coelenterates take (e.g. a hydra or coral): usually sedentary with a hollow cylindrical body usually with a ring of tentacles around the mouth
Polyprion americanus: brown fish of the Atlantic and Mediterranean found around rocks and shipwrecks
Pomacentrus leucostictus: a blue and yellow damselfish of Bermuda and Florida and the West Indies
Pomatomus saltatrix: bluish warm-water marine food and game fish that follow schools of small fishes into shallow waters
Pomeranian: breed of very small compact long-haired dogs of the spitz type
Pomolobus pseudoharengus: shad-like food fish that runs rivers to spawn; often salted or smoked; sometimes placed in genus Pomolobus
Pomoxis annularis: a crappie that is white
Pomoxis nigromaculatus: a crappie that is black
pompano: any of several deep-bodied food fishes of western Atlantic and Gulf of Mexico
pond-skater: long-legged bug that skims about on the surface of water
Pongo pygmaeus: large long-armed ape of Borneo and Sumatra having arboreal habits
pony: any of various breeds of small gentle horses usually less than five feet high at the shoulder
pony: an informal term for a racehorse
pony: a range horse of the western United States
poodle: an intelligent dog with a heavy curly solid-colored coat that is usually clipped; an old breed sometimes trained as sporting dogs or as performing dogs
Pooecetes gramineus: common North American finch noted for its evening song
Popillia japonica: small metallic green and brown beetle native to eastern Asia; serious plant pest in North America
popinjay: an archaic term for a parrot
porgy: important deep-bodied food and sport fish of warm and tropical coastal waters; found worldwide
porker: a pig fattened to provide meat
Poronotus triacanthus: small food fish of Atlantic coast
Porphyrio porphyrio: purple gallinule of southern Europe
Porphyrula martinica: American purple gallinule
porpoise: any of several small gregarious cetacean mammals having a blunt snout and many teeth
Portuguese man-of-war: large siphonophore having a bladderlike float and stinging tentacles
Porzana porzana: Eurasian rail of swamps and marshes
post horse: a horse kept at an inn or post house for use by mail carriers or for rent to travelers
Potamogale velox: amphibious African insectivorous mammal that resembles an otter
Potamophis striatula: in some classifications placed in genus Haldea; small reddish-grey snake of eastern North America
potoroo: Australian rat kangaroos
Potos caudivolvulus: arboreal fruit-eating mammal of tropical America with a long prehensile tail
potter bee: solitary bee that builds nests of mud or pebbles cemented together and attached to a plant
potter wasp: any of various solitary wasps that construct vase-shaped cells of mud for their eggs
pouter: one of a breed of pigeon that enlarge their crop until their breast is puffed out
prairie chicken: brown mottled North American grouse of western prairies
prairie dog: any of several rodents of North American prairies living in large complex burrows having a barking cry
prancer: a mettlesome or fiery horse
prawn: shrimp-like decapod crustacean having two pairs of pincers; most are edible
praya: colonial siphonophore of up to 130 ft long
predator: any animal that lives by preying on other animals
prey: animal hunted or caught for food
Priacanthus arenatus: brightly colored carnivorous fish of western Atlantic and West Indies waters
pricket: male deer in his second year
prickleback: small elongate fishes of shallow northern seas; a long dorsal fin consists entirely of spines
prickleback: small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research
primate: any placental mammal of the order Primates; has good eyesight and flexible hands and feet
Priodontes giganteus: about three feet long exclusive of tail
Prionace glauca: slender cosmopolitan, pelagic shark; blue body shades to white belly; dangerous especially during maritime disasters
Prionotus carolinus: large searobin; found from Nova Scotia to Florida
Pristis pectinatus: commonly found in tropical bays and estuaries; not aggressive
proboscidean: massive herbivorous mammals having tusks and a long trunk
Procavia capensis: hyrax that lives in rocky areas
Procellaria aequinoctialis: large black petrel of southern seas having a white mark on the chin
procellariiform seabird: large long-winged bird with hooked bill and tubular nostrils that wanders the open seas
Prociphilus tessellatus: attacks alders
proconsul: an anthropoid ape of the genus Proconsul
Procyon cancrivorus: a South American raccoon
Procyon lotor: North American raccoon
procyonid: plantigrade carnivorous mammals
Progne subis: large North American martin of which the male is blue-black
prosimian: primitive primates having large ears and eyes and characterized by nocturnal habits
Prosopium cylindraceum: a whitefish with a bronze back; of northern North America and Siberia
Proteles cristata: striped hyena of southeast Africa that feeds chiefly on insects
Proteus anguinus: European aquatic salamander with permanent external gills that lives in caves
protoavis: most primitive avian type known; extinct bird of the Triassic having bird-like jaw and hollow limbs and breastbone with dinosaur-like tail and hind limbs
protoceratops: small horned dinosaur
protohippus: Pliocene horse approaching donkeys in size
protomammal: probably warm-blooded; considered direct ancestor of mammals
prototherian: primitive oviparous mammals found only in Australia and Tasmania and New Guinea
proturan: any of several minute primitive wingless and eyeless insects having a cone-shaped head; inhabit damp soil or decaying organic matter
Prunella modularis: small brownish European songbird
Psetta maxima: a large brownish European flatfish
Psettichthys melanostichus: a common flatfish of the Pacific coast of North America
Pseudaletia unipuncta: moth whose destructive larvae travel in multitudes
Pseudaletia unipuncta: noctuid moth larvae that travel in multitudes destroying especially grass and grain
Pseudechis porphyriacus: large semiaquatic snake of Australia; black above with red belly
Pseudemys concinna: large river turtle of the southern United States and northern Mexico
Pseudemys rubriventris: freshwater turtle of Chesapeake Bay tributaries having red markings on the lower shell
Pseudemys scripta: freshwater turtle of United States and South America; frequently raised commercially; some young sold as pets
Pseudococcus comstocki: Asiatic insect introduced accidentally into United States; pest on citrus and apple trees
Pseudococcus fragilis: destructive especially to citrus
Pseudopleuronectes americanus: important American food fish in the winter
Pseudoryx nghetinhensis: cow-like creature with the glossy coat of a horse and the agility of a goat and the long horns of an antelope; characterized as a cow that lives the life of a goat
psittacosaur: primitive dinosaur actually lacking horns and having only the beginning of a frill; long hind limbs and short forelimbs; may have been bipedal
Psittacula krameri: African parakeet
Psittacus erithacus: commonly domesticated grey parrot with red-and-black tail and white face; native to equatorial Africa
psocid: small winged insect living on the bark and leaves of trees and feeding on e.g. fungi and decaying plant matter
psocopterous insect: small soft-bodied insect with chewing mouthparts and either no wings or two pairs
psychodid: a fly of the family Psychodidae
ptarmigan: large Arctic and subarctic grouse with feathered feet and usually white winter plumage
Pternohyla fodiens: terrestrial burrowing nocturnal frog of grassy terrain and scrub forests having very hard upper surface of head; of the United States southwest
Pterocles alchata: sandgrouse of Europe and Africa having elongated middle tail feathers
Pterocles indicus: sandgrouse of India
Pterocnemia pennata: smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan
pterodactyl: extinct flying reptile
Pteropus capestratus: a variety of fruit bat
Pteropus hypomelanus: a variety of fruit bat
Ptilonorhynchus violaceus: of southeast Australia; male is glossy violet blue; female is light grey-green
Ptloris paradisea: velvety black Australian bird of paradise with green and purple iridescence on head and tail
Ptychozoon homalocephalum: a gecko that has membranous expansions along the sides of its body and limbs and tail that enable it to glide short distances
puffbird: brownish tropical American bird having a large head with fluffed out feathers
puffin: any of two genera of northern seabirds having short necks and brightly colored compressed bills
Puffinus puffinus: small black-and-white shearwater common in the northeastern Atlantic
pug: small compact smooth-coated breed of Asiatic origin having a tightly curled tail and broad flat wrinkled muzzle
Pulex irritans: the most common flea attacking humans
pullet: young hen usually less than a year old
pup: young of any of various canines such as a dog or wolf
pupa: an insect in the inactive stage of development (when it is not feeding) intermediate between larva and adult
puppy: a young dog
pureblood: a pedigreed animal of unmixed lineage; used especially of horses
purple gallinule: gallinules with showy purplish plumage
pycnogonid: any of various small spiderlike marine arthropods having small thin bodies and long slender legs
Pygoscelis adeliae: medium-sized penguins occurring in large colonies on the Adelie Coast of Antarctica
Pylodictus olivaris: large catfish of central United States having a flattened head and projecting jaw
pyralid: usually tropical slender-bodied long-legged moth whose larvae are crop pests
Pyrausta nubilalis: larva of the European corn borer moth; a serious pest of maize
Pyrocephalus rubinus mexicanus: tropical American flycatcher found as far north as southern Texas and Arizona; adult male has bright scarlet and black plumage
Pyrophorus noctiluca: tropical American click beetle having bright luminous spots
Pyrrhula pyrrhula: common European finch mostly black and white with red throat and breast
Pyrrhuloxia sinuata: crested grey-and-red bird of southwest United States and Mexico
python: large Old World boas
Python molurus: very large python of southeast Asia
Python reticulatus: of southeast Asia and East Indies; the largest snake in the world
Python sebae: very large python of tropical and southern Africa
quack-quack: child's word for a duck
quadruped: an animal especially a mammal having four limbs specialized for walking
quail: small gallinaceous game birds
quarter horse: a small powerful horse originally bred for sprinting in quarter-mile races in Virginia
queen: the only fertile female in a colony of social insects such as bees and ants and termites; its function is to lay eggs
queen bee: fertile egg-laying female bee
queen: an especially large mole rat and the only member of a colony of naked mole rats to bear offspring which are sired by only a few males
queen: female cat
quetzal: large trogon of Central America and South America having golden-green and scarlet plumage
Quiscalus quiscula: eastern United States grackle
rabbit ears: the long ears of a rabbit
raccoon: an omnivorous nocturnal mammal native to North America and Central America
racer: an animal that races
racer: slender fast-moving North American snakes
Rachycentron canadum: large dark-striped tropical food and game fish related to remoras; found worldwide in coastal to open waters
rail: any of numerous widely distributed small wading birds of the family Rallidae having short wings and very long toes for running on soft mud
Raja batis: common European skate used as food
Raja erinacea: most plentiful skate in North American inshore waters in summer; to 21 inches
Raja laevis: one of the largest skates (to 5 feet); an active skate easy to hook
Raja radiata: cold-water bottom fish with spines on the back; to 40 inches
ram: uncastrated adult male sheep
Rambouillet: hardy sheep developed from the merino producing both good mutton and fine wool
Rana cascadae: mountain frog found near water; of United States Northwest to California
Rana catesbeiana: largest North American frog; highly aquatic with a deep-pitched voice
Rana clamitans: similar to bullfrog; found in or near marshes and ponds; of United States and Canada
Rana goliath: largest living frog; up to a foot and weighing up to 10 lbs; Africa
Rana palustris: a meadow frog of eastern North America
Rana pipiens: common North American green or brownish frog having white-edged dark oval spots
Rana sylvatica: wide-ranging light-brown frog of moist North American woodlands especially spruce
Rana tarahumarae: Mexican frog found within a jump or two of water
Rana temporaria: a common semiterrestrial European frog
range animal: any animal that lives and grazes in the grassy open land of western North America (especially horses, cattle, sheep)
Rangifer arcticus: of tundra of northern Canada; in some classifications included in the species Rangifer tarandus
Rangifer caribou: any of several large caribou living in coniferous forests of southern Canada; in some classifications included in the species Rangifer tarandus
Rangifer tarandus: Arctic deer with large antlers in both sexes; called `reindeer' in Eurasia and `caribou' in North America
ranid: insectivorous usually semiaquatic web-footed amphibian with smooth moist skin and long hind legs
Raphicerus campestris: small plains antelope of southeastern Africa
Raphus cucullatus: extinct heavy flightless bird of Mauritius related to pigeons
rat: any of various long-tailed rodents similar to but larger than a mouse
rat snake: any of various nonvenomous rodent-eating snakes of North America and Asia
rat terrier: any of several breeds of terrier developed to catch rats
rattler: pit viper with horny segments at the end of the tail that rattle when shaken
Rattus norvegicus: common domestic rat; serious pest worldwide
Rattus rattus: common household pest originally from Asia that has spread worldwide
ray: cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins
razor fish: any of several small wrasses with compressed sharp-edged heads of the West Indies and Mediterranean
razorback: a mongrel hog with a thin body and long legs and a ridged back; a wild or semi-wild descendant of improved breeds; found chiefly in the southeastern United States
razorback: any of several baleen whales of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin
red coral: corals of especially the Mediterranean having pink or red color used for ornaments and jewelry
red poll: hornless short-haired breed of beef and dairy cattle
redback vole: any of several voles of mountainous regions of Eurasia and America
redbone: a speedy red or red-and-tan American hound
redfish: male salmon that has recently spawned
redhorse: North American sucker with reddish fins
redstart: European songbird with a reddish breast and tail; related to Old World robins
reeve: female ruff
Regalecus glesne: thin deep-water tropical fish 20 to 30 feet long having a red dorsal fin
Regulus calendula: American kinglet with a notable song and in the male a red crown patch
Regulus regulus: European kinglet with a black-bordered yellow crown patch
Regulus satrata: American golden-crested kinglet
Remilegia australis: large blue Pacific remora that attaches to whales and dolphins
remora: marine fishes with a flattened elongated body and a sucking disk on the head for attaching to large fish or moving objects
remount: a fresh horse especially (formerly) to replace one killed or injured in battle
reptile: any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms
requiem shark: any of numerous sharks from small relatively harmless bottom-dwellers to large dangerous oceanic and coastal species
Reticulitermes flanipes: destructive United States termite
Reticulitermes lucifugus: destructive European termite
retriever: a dog with heavy water-resistant coat that can be trained to retrieve game
Reynard: a conventional name for a fox used in tales following usage in the old epic `Reynard the Fox'
Rhagoletis pomonella: larvae bore into and feed on apples
Rhea americana: larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia
Rhincodon typus: large spotted shark of warm surface waters worldwide; resembles a whale and feeds chiefly on plankton
rhino: massive powerful herbivorous odd-toed ungulate of southeast Asia and Africa having very thick skin and one or two horns on the snout
Rhinoceros antiquitatis: extinct thick-haired species of Arctic regions
rhinoceros beetle: any of various large chiefly tropical beetles having horns on the head; pest on coconuts
Rhinoceros unicornis: having one horn
Rhinonicteris aurantius: a common bat of northwestern Australia having orange or yellow fur
Rhinoptera bonasus: large ray found along eastern coast of North America
Rhode Island red: American breed of heavy-bodied brownish-red general-purpose chicken
Rhodesian ridgeback: a powerful short-haired African hunting dog having a crest of reversed hair along the spine
Rhyacotriton olympicus: small large-eyed semiaquatic salamander of the United States Northwest
Rhynchoelaps australis: small venomous but harmless snake marked with black-and-white on red
ribbonfish: marine fish having a long compressed ribbonlike body
Richardson ground squirrel: of sagebrush and grassland areas of western United States and Canada
Richmondena Cardinalis: crested thick-billed North American finch having bright red plumage in the male
ridgel: a colt with undescended testicles
ridley: a marine turtle
right whale: large Arctic whalebone whale; allegedly the `right' whale to hunt because of its valuable whalebone and oil
righteye flounder: flounders with both eyes on the right side of the head
ring snake: any of numerous small nonvenomous North American snakes with a yellow or orange ring around the neck
ringlet: any of various butterflies belonging to the family Satyridae
ringtail: an immature golden eagle
Riparia riparia: swallow of the northern hemisphere that nests in tunnels dug in clay or sand banks
river dolphin: any of several long-snouted usually freshwater dolphins of South America and southern Asia
rivulus: found in small streams of tropical America; often kept in aquariums; usually hermaphroditic
roan: a horse having a brownish coat thickly sprinkled with white or gray
robalo: a kind of percoid fish
robber frog: small terrestrial frog of tropical America
Roccus saxatilis: marine food and game fish with dark longitudinal stripes; migrates upriver to spawn; sometimes placed in the genus Morone
Rock Cornish: small plump hybrid developed by crossbreeding Plymouth Rock and Cornish fowl
rock kangaroo: slender long-legged Australian wallabies living in caves and rocky areas
rockfish: marine food fish found among rocks along the northern coasts of Europe and America
Rocky Mountain bighorn: wild sheep of mountainous regions of western North America having massive curled horns
Rocky Mountain goat: sure-footed mammal of mountainous northwestern North America
Rocky Mountain whitefish: whitefish of the western United States and Canada
Rodolia cardinalis: native to Australia; introduced elsewhere to control scale insects
roebuck: male roe deer
rogue elephant: a wild and vicious elephant separated from the herd
roller: Old World bird that tumbles or rolls in flight; related to kingfishers
roller: pigeon that executes backward somersaults in flight or on the ground
rotifer: minute aquatic multicellular organisms having a ciliated wheel-like organ for feeding and locomotion; constituents of freshwater plankton
Rottweiler: German breed of large vigorous short-haired cattle dogs
rough fish: any fish useless for food or sport or even as bait
rove beetle: active beetle typically having predatory or scavenging habits
royal: stag with antlers of 12 or more branches
ruminant: any of various cud-chewing hoofed mammals having a stomach divided into four (occasionally three) compartments
Rupicapra rupicapra: hoofed mammal of mountains of Eurasia having upright horns with backward-hooked tips
Rupicola peruviana: bird of the Andes similar to Rupicola rupicola
Rupicola rupicola: tropical bird of northern South America the male having brilliant red or orange plumage and an erectile disklike crest
Russian wolfhound: tall fast-moving dog breed
rust mite: any of several varieties of mite that burrow into plants and cause a reddish-brown discoloration on the leaves or fruit
Rutilus rutilus: European freshwater food fish having a greenish back
Ruvettus pretiosus: very large deep-water snake mackerel
sabertooth: any of many extinct cats of the Old and New Worlds having long swordlike upper canine teeth; from the Oligocene through the Pleistocene
sagitta: any arrowworm of the genus Sagitta
Sagittarius serpentarius: large long-legged African bird of prey that feeds on reptiles
Saiga tatarica: goat-like antelope of central Eurasia having a stubby nose like a proboscis
sailfish: large pelagic game fish having an elongated upper jaw and long dorsal fin that resembles a sail
Saimiri sciureus: small long-tailed monkey of Central American and South America with greenish fur and black muzzle
Saint Bernard: a Swiss alpine breed of large powerful dog with a thick coat of hair used as a rescue dog
saki: small arboreal monkey of tropical South America with long hair and bushy nonprehensile tail
salamander: any of various typically terrestrial amphibians that resemble lizards and that return to water only to breed
Salamandra atra: ovoviviparous amphibian of the Alps
Salamandra maculosa: European salamander having dark skin with usually yellow spots
Salmo gairdneri: found in Pacific coastal waters and streams from lower California to Alaska
Salmo trutta: speckled trout of European rivers; introduced in North America
salmon: any of various large food and game fishes of northern waters; usually migrate from salt to fresh water to spawn
salmonid: soft-finned fishes of cold and temperate waters
salp: minute floating marine tunicate having a transparent body with an opening at each end
Salpinctes obsoletus: wren inhabiting badlands and mesa country of western United States and Mexico
Saluki: old breed of tall swift keen-eyed hunting dogs resembling greyhounds; from Egypt and southwestern Asia
Salvelinus alpinus: small trout of northern waters; landlocked populations in Quebec and northern New England
Salvelinus fontinalis: North American freshwater trout; introduced in Europe
Salvelinus namaycush: large fork-tailed trout of lakes of Canada and the northern United States
Samia cynthia: large green silkworm of the cynthia moth
Samia walkeri: large Asiatic moth introduced into the United States; larvae feed on the ailanthus
Samoyede: Siberian breed of white or cream-colored dog of the spitz family
sand cat: a desert wildcat
sand dab: small food fishes of the Pacific coast of North America
sand dollar: flattened disklike sea urchins that live on sandy bottoms
sand grouse: pigeon-like bird of arid regions of the Old World having long pointed wings and tail and precocial downy young
sand rat: small nearly naked African mole rat of desert areas
sand snake: small North American burrowing snake
sand stargazer: small pallid fishes of shoal tropical waters of North America and South America having eyes on stalks atop head; they burrow in sand to await prey
sandfish: either of two small silvery scaleless fishes of the northern Pacific that burrow into sand
sandpiper: any of numerous usually small wading birds having a slender bill and piping call; closely related to the plovers
Santa Gertrudis: Brahman and shorthorn crossbreed of red cattle; hardy in hot regions
sapsucker: small American woodpecker that feeds on sap from e.g. apple and maple trees
Sarcophaga carnaria: fly whose larvae feed on carrion or the flesh of living animals
Sarcophilus hariisi: small ferocious carnivorous marsupial having a mostly black coat and long tail
Sarcorhamphus papa: large black-and-white vulture of South America and Central America; have colorful wattles and wartlike protuberances on head and neck
Sarda chiliensis: common bonito of Pacific coast of the Americas; its dark oily flesh cans well
Sardina pilchardus: small fishes found in great schools along coasts of Europe; smaller and rounder than herring
sardine: any of various small edible herring or related food fishes frequently canned
Sardinops caerulea: small pilchards common off the pacific coast of North America
sargassum fish: small fantastically formed and colored fishes found among masses of sargassum
Saturnia pavonia: large moth of temperate forests of Eurasia having heavily scaled transparent wings
saturniid: large brightly colored and usually tropical moth; larvae spin silken cocoons
saurian: any of various reptiles of the suborder Sauria which includes lizards; in former classifications included also the crocodiles and dinosaurs
saurischian: herbivorous or carnivorous dinosaur having a three-pronged pelvis like that of a crocodile
Sauromalus obesus: a herbivorous lizard that lives among rocks in the arid parts of southwestern United States and Mexico
sauropod: very large herbivorous dinosaur of the Jurassic and Cretaceous having a small head a long neck and tail and five-toed limbs; largest known land animal
sausage dog: informal term
sawfish: primitive ray with sharp teeth on each edge of a long flattened snout
sawfly: insect whose female has a saw-like ovipositor for inserting eggs into the leaf or stem tissue of a host plant
sawyer: any of several beetles whose larvae bore holes in dead or dying trees especially conifers
Saxicola rubetra: brown-and-buff European songbird of grassy meadows
Saxicola torquata: common European chat with black plumage and a reddish-brown breast
Sayornis phoebe: small dun-colored North American flycatcher
scad: any of a number of fishes of the family Carangidae
scale insect: small homopterous insect that usually lives and feeds on plants and secretes a protective waxy covering
Scaphiopus bombifrons: this spadefoot toad lives in plains and hills and river bottoms in areas of low rainfall east of the Rocky Mountains
Scaphiopus hammondii: this spadefoot toad live in California
Scaphiopus multiplicatus: this spadefoot toad lives in the southwestern United States
scaphopod: burrowing marine mollusk
scarabaean: any of numerous species of stout-bodied beetles having heads with horny spikes
Scarabaeus sacer: scarabaeid beetle considered divine by ancient Egyptians
Scardinius erythrophthalmus: European freshwater fish resembling the roach
Scartella cristata: inhabits both coasts of tropical Atlantic
scavenger: any animal that feeds on refuse and other decaying organic matter
Sceloglaux albifacies: almost extinct owl of New Zealand
Sceloporus graciosus: a ground dweller that prefers open ground and scattered low bushes; of United States west between Rocky and Sierra Nevada Mountains
Sceloporus occidentalis: common western lizard; seen on logs or rocks
Sceloporus undulatus: small active lizard of United States and north to British Columbia
schipperke: breed of small stocky black dogs originally used as watchdogs on boats in the Netherlands and Belgium
schnauzer: old German breed of sturdy black or greyish wire-haired terriers having a blunt muzzle ranging in size from fairly small to very large; used as ratters and guard dogs or police dogs
schrod: young Atlantic cod or haddock especially one split and boned for cooking
Sciaena antarctica: large important food fish of Australia; almost indistinguishable from the maigre
Sciaena aquila: large European marine food fish
sciaenid: widely distributed family of carnivorous percoid fishes having a large air bladder used to produce sound
Sciaenops ocellatus: large edible fish found off coast of United States from Massachusetts to Mexico
scincid: alert agile lizard with reduced limbs and an elongated body covered with shiny scales; more dependent on moisture than most lizards; found in tropical regions worldwide
Sciurus carolinensis: common medium-large squirrel of eastern North America; now introduced into England
Sciurus griseus: large grey squirrel of far western areas of United States
Sciurus niger: exceptionally large arboreal squirrel of eastern United States
Sciurus vulgaris: common reddish-brown squirrel of Europe and parts of Asia
Scolopax rusticola: short-legged long-billed migratory Old World woodcock
Scolytus multistriatus: a vector of the fungus causing Dutch elm disease
Scomber japonicus: small mackerel found nearly worldwide
Scomber scombrus: important food fish of the northern Atlantic and Mediterranean; its body is greenish-blue with dark bars and small if any scales
Scomberesox saurus: slender long-beaked fish of temperate Atlantic waters
Scomberomorus cavalla: large mackerel with long pointed snout; important food and game fish of the eastern Atlantic coast southward to Brazil
Scomberomorus maculatus: a large commercially important mackerel of the Atlantic coastal waters of North America
Scomberomorus regalis: large edible mackerel of temperate United States coastal Atlantic waters
Scomberomorus sierra: a Spanish mackerel of western North America
scombroid: important marine food and game fishes found in all tropical and temperate seas; some are at least partially endothermic and can thrive in colder waters
scooter: large black diving duck of northern parts of the northern hemisphere
Scophthalmus aquosus: very thin translucent flounder of the Atlantic coast of North America
Scophthalmus rhombus: European food fish
scops owl: any of several small owls having ear tufts and a whistling call
Scorpaena grandicornis: a kind of scorpionfish
scorpaenid: any of numerous carnivorous usually bottom-dwelling warm-water marine fishes found worldwide but most abundant in the Pacific
scorpaenoid: fishes having the head armored with bony plates
scorpion: arachnid of warm dry regions having a long segmented tail ending in a venomous stinger
scorpion fish: marine fishes having a tapering body with an armored head and venomous spines
scorpion fly: any of various mecopterous insects of the family Panorpidae of the northern hemisphere having a long beak and long antennae; males have a tail like that of a scorpion except it is not venomous
scorpion shell: any of numerous tropical marine snails that as adults have the outer lip of the aperture produced into a series of long curved spines
Scottish deerhound: very large and tall rough-coated dog bred for hunting deer; known as the royal dog of Scotland
Scottish terrier: old Scottish breed of small long-haired usually black terrier with erect tail and ears
screamer: gooselike aquatic bird of South America having a harsh trumpeting call
screech owl: any owl that has a screeching cry
scrub bird: small fast-running Australian bird resembling a wren and frequenting brush or scrub
sculpin: any of numerous spiny large-headed usually scaleless scorpaenoid fishes with broad mouths
Scutigera coleoptrata: long-legged centipede common in damp places as e.g. cellars
Scutigerella immaculata: minute arthropod often infesting the underground parts of truck-garden and greenhouse crops
scyphozoan: any of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle
sea bass: any of various food and sport fishes of the Atlantic coast of the United States having an elongated body and long spiny dorsal fin
sea bird: a bird that frequents coastal waters and the open ocean: gulls; pelicans; gannets; cormorants; albatrosses; petrels; etc.
sea catfish: any of numerous marine fishes most of which are mouthbreeders; not used for food
sea chub: schooling fishes mostly of Indian and western Pacific oceans; two species in western Atlantic
sea cow: any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs
sea duck: any of various large diving ducks found along the seacoast: eider; scoter; merganser
sea eagle: any of various large eagles that usually feed on fish
sea fan: corals having a treelike or fan-shaped horny skeleton
sea feather: corals forming featherlike colonies
sea gooseberry: ctenophore having a rounded body with longitudinal rows of cilia
sea horse: small fish with horse-like heads bent sharply downward and curled tails; swim in upright position
sea horse: either of two large northern marine mammals having ivory tusks and tough hide over thick blubber
sea lily: crinoid with delicate radiating arms and a stalked body attached to a hard surface
sea lion: any of several large eared seals of the northern Pacific related to fur seals but lacking their valuable coat
sea louse: marine isopod crustacean
sea mouse: any of several large worms having a broad flattened body with a mat of coarse hairs covering the back
sea pen: fleshy featherlike warm-water colonies
sea robin: American gurnard; mostly found in bays and estuaries
sea snake: any of numerous venomous aquatic viviparous snakes having a fin-like tail; of warm littoral seas; feed on fish which they immobilize with quick-acting venom
sea squirt: ascidian that can contract its body and eject streams of water
sea star: echinoderms characterized by five arms extending from a central disk
sea trout: any of several sciaenid fishes of North American coastal waters
sea trout: silvery marine variety of brown trout that migrates to fresh water to spawn
sea urchin: shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells
seal: any of numerous marine mammals that come on shore to breed; chiefly of cold regions
Sealyham terrier: a wire-haired terrier with short legs that was first bred in Sealyham
seasnail: any of several creeping marine gastropods with a spirally coiled shell: whelks; tritons; moon shells; neritids
Seattle Slew: thoroughbred that won the triple crown in 1977
Sebastodes caurinus: a rockfish of the Pacific coastal waters of North America
Sebastodes marinus: large fish of northern Atlantic coasts of America and Europe
Sebastodes miniatus: a commercially important fish of the Pacific coast of North America
Sebastodes ruberrimus: a large fish of the Pacific coast of North America
Secretariat: thoroughbred that won the triple crown in 1973
seed beetle: a small beetle that infests the seeds of legumes
seed oyster: a young oyster especially of a size for transplantation
Seeing Eye dog: (trademark) a guide dog trained to guide a blind person
Seiurus aurocapillus: American warbler; builds a dome-shaped nest on the ground
seizure-alert dog: a dog that can alert or assist people with seizure disorders
Selar crumenophthalmus: of Atlantic coastal waters; commonly used for bait
Selenarctos thibetanus: bear with a black coat living in central and eastern Asia
Selene setapinnis: any of several silvery marine fishes with very flat bodies
Selene vomer: similar to moonfish but with eyes high on the truncated forehead
Semnopithecus entellus: langur of southern Asia; regarded as sacred in India
Sennenhunde: any of four Swiss breeds
serin: any of various brown and yellow finches of parts of Europe
Serinus canaria: native to the Canary Islands and Azores; popular usually yellow cage bird noted for its song
Seriola dorsalis: game fish of southern California and Mexico having a yellow tail fin
Seriola grandis: large game fish of Australia and New Zealand
Seriola zonata: fish having the habit of following ships; found in North American and South American coastal waters
Seriphus politus: silvery and bluish drumfish of shallow California coastal waters
serow: short-horned dark-coated goat antelope of mountain areas of southern and southeastern Asia
serranid: marine food sport fishes mainly of warm coastal waters
Serranus subligarius: found in warm shallow waters of western Atlantic
sertularian: feathery colony of long-branched stems bearing stalkless paired polyps
Setophaga ruticilla: flycatching warbler of eastern North America the male having bright orange on sides and wings and tail
setter: a long-haired dog formerly trained to crouch on finding game but now to point
sewer rat: brown rat commonly found in sewers
shad: herring-like food fishes that migrate from the sea to fresh water to spawn
shark: any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales
shearwater: long-winged oceanic bird that in flight skims close to the waves
sheep: woolly usually horned ruminant mammal related to the goat
sheep dog: any of various usually long-haired breeds of dog reared to herd and guard sheep
sheep frog: mostly of Central America
sheldrake: Old World gooselike duck slightly larger than a mallard with variegated mostly black-and-white plumage and a red bill
shelduck: female sheldrake
Shetland pony: breed of very small pony with long shaggy mane and tail
Shetland sheep dog: a small sheepdog resembling a collie that was developed in the Shetland Islands
Shih-Tzu: a Chinese breed of small dog similar to a Pekingese
shiner: any of numerous small silvery North American cyprinid fishes especially of the genus Notropis
shipworm: wormlike marine bivalve that bores into wooden piers and ships by means of drill-like shells
shire: British breed of large heavy draft horse
shrew mole: slender mole having a long snout and tail
shrew: small mouselike mammal with a long snout; related to moles
shrike: any of numerous Old World birds having a strong hooked bill that feed on smaller animals
shrimp: small slender-bodied chiefly marine decapod crustaceans with a long tail and single pair of pincers; many species are edible
shrimpfish: slender tropical shallow-water East Indian fish covered with transparent plates
Sialis lutaria: dark-colored insect having predaceous aquatic larvae
Siamese cat: a slender short-haired blue-eyed breed of cat having a pale coat with dark ears paws face and tail tip
Siberian husky: breed of sled dog developed in northeastern Siberia; they resemble the larger Alaskan malamutes
Sigmodon hispidus: destructive long-haired burrowing rat of southern North America and Central America
sild: any of various young herrings (other than brislings) canned as sardines in Norway
silkworm: the commercially bred hairless white caterpillar of the domestic silkworm moth which spins a cocoon that can be processed to yield silk fiber; the principal source of commercial silk
silurid: Old World freshwater catfishes having naked skin and a long anal fin more or less merged with the eellike caudal fin
silver fox: red fox in the color phase when its pelt is tipped with white
silverback: an adult male gorilla with grey hairs across the back
silverfish: a silvery variety of Carassius auratus
silverside: small fishes having a silver stripe along each side; abundant along the Atlantic coast of the United States
silverspot: butterfly with silver spots on the underside of the hind wings
Silvia atricapilla: small brownish-grey warbler with a black crown
simian: an ape or monkey
Sinornis: sparrow-sized fossil bird of the Jurassic period to the Cretaceous period having a keeled breastbone and vestigial tail; found in China; considered possibly the second most primitive of all birds
siphonophore: a floating or swimming oceanic colony of polyps often transparent or showily colored
Sir Barton: thoroughbred that won the triple crown in 1919
sire: male parent of an animal especially a domestic animal such as a horse
siren: eellike aquatic North American salamander with small forelimbs and no hind limbs; have permanent external gills
Sistrurus catenatus: pygmy rattlesnake found in moist areas from the Great Lakes to Mexico; feeds on mice and small amphibians
Sistrurus miliaris: small pygmy rattlesnake
Sitophylus oryzae: brown weevil that infests stored grain especially rice
Sitotroga cerealella: small moth whose larvae feed on kernels of stored grains
Sitta canadensis: bluish-grey nuthatch with reddish breast; of northern coniferous forests
Sitta carolinensis: bluish-grey nuthatch with black head and white breast; of eastern North America
Sivapithecus: fossil primates found in India
skate: large edible rays having a long snout and thick tail with pectoral fins continuous with the head; swim by undulating the edges of the pectoral fins
skeleton shrimp: small amphipod crustacean having a grotesque form suggestive of the praying mantis; found chiefly on seaweed
skimmer: gull-like seabird that flies along the surface of the water with an elongated lower mandible immersed to skim out food
Skye terrier: Scottish breed of terrier with shaggy hair and long low body with short legs; native to the Isle of Skye
slater: any of various small terrestrial isopods having a flat elliptical segmented body; found in damp habitats
slave ant: any of various ants captured as larvae and enslaved by another species
slave-maker: an ant that attacks colonies of other ant species and carries off the young to be reared as slave ants
sled dog: a dog trained to draw a sled usually in a team
sleeper: tropical fish that resembles a goby and rests quietly on the bottom in shallow water
slender salamander: any of several small slim salamanders of the Pacific coast of the United States
sloth: any of several slow-moving arboreal mammals of South America and Central America; they hang from branches back downward and feed on leaves and fruits
slug: any of various terrestrial gastropods having an elongated slimy body and no external shell
smelt: small trout-like silvery marine or freshwater food fishes of cold northern waters
Smiledon californicus: North American sabertooth; culmination of sabertooth development
smooth dogfish: small bottom-dwelling shark found along both Atlantic coasts
smooth-haired fox terrier: a fox terrier with smooth hair
snail: freshwater or marine or terrestrial gastropod mollusk usually having an external enclosing spiral shell
snakefly: predatory insect of western North America having a long necklike prothorax
snapper: any of several large sharp-toothed marine food and sport fishes of the family Lutjanidae of mainly tropical coastal waters
snapping turtle: large aggressive freshwater turtle with powerful jaws
snipe: Old or New World straight-billed game bird of the sandpiper family; of marshy areas; similar to the woodcocks
snook: large tropical American food and game fishes of coastal and brackish waters; resemble pike
snout beetle: small weevil having a prolonged snout; destructive to e.g. grains and nuts
snow goose: blue goose in the white color phase
soapfish: fishes with slimy mucus-covered skin; found in the warm Atlantic coastal waters of America
social insect: an insect that lives in a colony with other insects of the same species
soft scale: an insect active in all stages
soft-coated wheaten terrier: Irish breed of medium-sized terrier with an abundant coat any shade of wheat and very hairy head and muzzle
soft-shell crab: edible crab that has recently molted and not yet formed its new shell
soldier: a wingless sterile ant or termite having a large head and powerful jaws adapted for defending the colony
soldierfish: the larger squirrelfishes
sole: right-eyed flatfish; many are valued as food; most common in warm seas especially European
Solea lascaris: small European sole
solitaire: a dull grey North American thrush noted for its beautiful song
Solo man: early man of late Pleistocene; skull resembles that of Neanderthal man but with smaller cranial capacity; found in Java
songbird: any bird having a musical call
Sonora semiannulata: small shy brightly-ringed terrestrial snake of arid or semiarid areas of western North America
Sorex araneus: common American shrew
Sorex cinereus: commonest shrew of moist habitats in North America
sorrel: a horse of a brownish orange to light brown color
South American poison toad: a South American toad
South American sea lion: of the southern coast of South America
sow: an adult female hog
sow bug: terrestrial isopod having an oval segmented body (a shape like a sow)
spadefoot: a burrowing toad of the northern hemisphere with a horny spade-like projection on each hind foot
spaniel: any of several breeds of small to medium-sized gun dogs with a long silky coat and long frilled ears
Spanish fly: green beetle of southern Europe
Spanish mackerel: medium-sized mackerel of temperate Atlantic and Gulf of Mexico
Spanish mackerel: any of several large marine food fishes of the genus Scomberomorus
Spanish pointer: a strong slender smooth-haired dog of Spanish origin having a white coat with brown or black patches; scents out and points to game
sparid: spiny-finned food fishes of warm waters having well-developed teeth
sparrow: any of several small dull-colored singing birds feeding on seeds or insects
spat: a young oyster or other bivalve
spawner: a female fish at spawning time
spearfish: any of several large vigorous pelagic fishes resembling sailfishes but with first dorsal fin much reduced; worldwide but rare
spearnose bat: New World bat with a pointed nose leaf; found from southern United States to Paraguay
Sphecius speciosis: large black or rust-colored wasp that preys on cicadas
sphecoid: any of various solitary wasps
sphenisciform seabird: flightless cold-water seabirds: penguins
Spheniscus demersus: small penguin of South America and southern Africa with a braying call
Sphenodon punctatum: only extant member of the order Rhynchocephalia of large spiny lizard-like diapsid reptiles of coastal islands off New Zealand
Sphyraena barracuda: large (up to 6 ft) greyish-brown barracuda highly regarded as a food and sport fish; may be dangerous to swimmers
Sphyrapicus varius: eastern North American sapsucker having a pale yellow abdomen
Sphyrapicus varius ruber: western North American sapsucker
Sphyrna tiburo: small harmless hammerhead having a spade-shaped head; abundant in bays and estuaries
Sphyrna tudes: fished for the hide and vitamin-rich liver
Sphyrna zygaena: fished for the hides and vitamin-rich liver
spider: predatory arachnid with eight legs, two poison fangs, two feelers, and usually two silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for prey
spider crab: any of numerous crabs with very long legs and small triangular bodies
spider mite: web-spinning mite that attacks garden plants and fruit trees
Spilogale putorius: small skunk with a marbled black and white coat; of United States and Mexico
Spinus pinus: small finch of North American coniferous forests
spiny dogfish: small bottom-dwelling dogfishes
spiny lizard: any of numerous lizards with overlapping ridged pointed scales; of North America and Central America
spiny puffer: puffers having rigid or erectile spines
SPipistrellus hesperus: of western North America
Spirula peronii: a small tropical cephalopod of the genus Spirula having prominent eyes and short arms and a many-chambered shell coiled in a flat spiral
spittle insect: small leaping herbivorous insect that lives in a mass of protective froth which it and its larvae secrete
spitz: any of various stocky heavy-coated breeds of dogs native to northern regions having pointed muzzles and erect ears with a curled furry tail
Spizella arborea: finch common in winter in the northern U.S.
Spizella passerina: small North American finch common in urban areas
Spizella pusilla: common North American finch of brushy pasturelands
Spodoptera exigua: moth whose larvae are beet armyworms
Spodoptera exigua: moth larva that eats foliage of beets and other vegetables
Spodoptera frugiperda: moth whose larvae are fall armyworms
Spodoptera frugiperda: larva of a migratory American noctuid moth; destroys grasses and small grains
spongefly: hairy-bodied insect whose larvae feed on freshwater sponges
spoonbill: wading birds having a long flat bill with a tip like a spoon
spouter: a spouting whale
spring cankerworm: variably colored looper; larva of Paleacrita vernata
spring chicken: a young chicken having tender meat
springer: a large spaniel with wavy silky coat usually black or liver and white
springer: a cow about to give birth
squab: an unfledged pigeon
squaretail: sluggish square-tailed fish armored with tough bony scales; of deep warm waters
Squatina squatina: sharks with broad flat bodies and winglike pectoral fins but that swim the way sharks do
squid: widely distributed fast-moving ten-armed cephalopod mollusk having a long tapered body with triangular tail fins
squirrel: a kind of arboreal rodent having a long bushy tail
squirrelfish: very small, brightly colored (especially red) nocturnal fishes of shallow waters or tropical reefs; they make sounds like a squirrel's bark
stable companion: a horse stabled with another or one of several horses owned by the same person
Staffordshire bull terrier: English breed of strong stocky dog having a broad skull and smooth coat
stag: adult male deer
stag beetle: a kind of lamellicorn beetle; the male has branched mandibles resembling antlers
staghorn coral: large branching coral resembling antlers
staghound: a large heavy hound formerly used in hunting stags and other large game; similar to but larger than a foxhound
stalking-horse: a horse behind which a hunter hides while stalking game
standard poodle: a breed or medium-sized poodles
standard schnauzer: a medium-sized schnauzer
stargazer: heavy-bodied marine bottom-lurkers with eyes on flattened top of the head
starling: gregarious birds native to the Old World
staurikosaur: primitive dinosaur found in Brazil
stayer: a person or other animal having powers of endurance or perseverance
Steatornis caripensis: nocturnal fruit-eating bird of South America that has fatty young yielding an oil that is used instead of butter
steed: (literary) a spirited horse for state of war
steeplechaser: a horse trained to run in steeplechases
Steganopus tricolor: breeds on the northern great plains of Canada
Stegosaur stenops: herbivorous ornithischian dinosaur with a row of bony plates along its back and a spiked tail probably used as a weapon
Stenopelmatus fuscus: large wingless nocturnal grasshopper that burrows in loose soil along the Pacific coast of the United States
Stenopterygius quadrisicissus: an ichthyosaur of the genus Stenopterygius
Stenotomus aculeatus: porgy of southern Atlantic coastal waters of North America
Stenotomus chrysops: found in Atlantic coastal waters of North America from South Carolina to Maine; esteemed as a panfish
Stercorarius parasiticus: a variety of jaeger
Sterna hirundo: common tern of Eurasia and America having white black and grey plumage
stick insect: any of various mostly tropical insects having long twiglike bodies
stingray: large venomous ray with large barbed spines near the base of a thin whiplike tail capable of inflicting severe wounds
stirk: yearling heifer or bullock
Stizostedion vitreum: pike-like freshwater perches
stoat: the ermine in its brown summer coat with black-tipped tail
stocker: a domestic animal (especially a young steer or heifer) kept as stock until fattened or matured and suitable for a breeding establishment
stomatopod: a kind of crustacean
Storeria occipitamaculata: harmless woodland snake of southeastern United States
stork: large mostly Old World wading birds typically having white-and-black plumage
storm petrel: any of various small petrels having dark plumage with paler underparts
stray: an animal that has strayed (especially a domestic animal)
Streptopelia risoria: greyish Old World turtledove with a black band around the neck; often caged
Streptopelia turtur: the common European wild dove noted for its plaintive cooing
Strix aluco: reddish-brown European owl having a round head with black eyes
Strix nebulosa: large dish-faced owl of northern North America and western Eurasia
Strix occidentalis: a large owl of North America found in forests from British Columbia to central Mexico; has dark brown plumage and a heavily spotted chest
Strix varia: large owl of eastern North America having its breast and abdomen streaked with brown
Strizostedion vitreum glaucum: variety inhabiting the Great Lakes
Strombus gigas: a large variety of conch
Struthio camelus: fast-running African flightless bird with two-toed feet; largest living bird
struthiomimus: small light-boned toothless dinosaur resembling an ostrich in size and proportions
Strymon melinus: larvae are pests of various economic plants
stud: adult male horse kept for breeding
stunt: a creature (especially a whale) that has been prevented from attaining full growth
sturgeon: large primitive fishes valued for their flesh and roe; widely distributed in the North Temperate Zone
Sturnella magna: a meadowlark of eastern North America
Sturnella neglecta: a meadowlark of western North America
Sturnus vulgaris: gregarious bird having plumage with dark metallic gloss; builds nests around dwellings and other structures; naturalized worldwide
styracosaur: an unusual ceratopsian dinosaur having many large spikes around the edge of its bony frill and a long nose horn; late Cretaceous
subclass Diapsida: used in former classifications to include all living reptiles except turtles; superseded by the two subclasses Lepidosauria and Archosauria
sucker: mostly North American freshwater fishes with a thick-lipped mouth for feeding by suction; related to carps
sucking pig: an unweaned piglet
suckling: a young mammal that has not been weaned
Sula bassana: very large white gannet with black wing tips
sulfur butterfly: any of numerous yellow or orange butterflies
superslasher: large (20-ft) and swift carnivorous dinosaur having an upright slashing claw 15 inches long on each hind foot; early Cretaceous
surf fish: small to medium-sized shallow-water fishes of the Pacific coast of North America
surgeonfish: brightly colored coral-reef fish with knifelike spines at the tail
Suricata suricatta: a meerkat with a thin and elongated tail
Suricata tetradactyla: burrowing diurnal meerkat of southern Africa; often kept as a pet
Surnia ulula: grey-and-white diurnal hawk-like owl of northern parts of the northern hemisphere
survivor: an animal that survives in spite of adversity
Sus scrofa: domestic swine
Sus scrofa: Old World wild swine having a narrow body and prominent tusks from which most domestic swine come; introduced in United States
Sussex spaniel: an English breed with short legs and a golden liver-colored coat
swallow: small long-winged songbird noted for swift graceful flight and the regularity of its migrations
swallow shrike: Australasian and Asiatic bird related to the shrikes and resembling a swallow
swan: stately heavy-bodied aquatic bird with very long neck and usually white plumage as adult
sweeper: little-known nocturnal fish of warm shallow seas with an oblong compressed body
sweet-potato whitefly: a variety of whitefly
swift: a small bird that resembles a swallow and is noted for its rapid flight
swimming crab: marine crab with some legs flattened and fringed for swimming
swine: stout-bodied short-legged omnivorous animals
Sydney silky: Australian breed of toy dogs having a silky blue coat
Sylvia communis: greyish-brown Old World warbler with a white throat and underparts
Sylvia curruca: Old World warbler similar to the greater whitethroat but smaller
Sylvilagus aquaticus: a wood rabbit of southeastern United States swamps and lowlands
Sylvilagus floridanus: widely distributed in United States except northwest and far west regions
Sylvilagus palustris: a wood rabbit of marshy coastal areas from North Carolina to Florida
Symbion pandora: only known species of Cycliophora; lives symbiotically attached to a lobster's lip by an adhesive disk and feeding by means of a hairy mouth ring; its complex life cycle includes asexual and sexual phases
Symphalangus syndactylus: large black gibbon of Sumatra having the 2nd and 3rd toes partially united by a web
Synagrops bellus: small marine fish with black mouth and gill cavity
Synanceja verrucosa: venomous tropical marine fish resembling a piece of rock
synapsid: extinct reptile having a single pair of lateral temporal openings in the skull
Synaptomys borealis: of wet alpine and subalpine meadows of Canada and Alaska
Synaptomys cooperi: of low bogs and meadows of northeastern and central United States and southern Canada
Synercus caffer: large often savage buffalo of southern Africa having upward-curving horns; mostly in game reserves
Syngnathus hildebrandi: small (4 inches) fish found off the Florida Gulf Coast
Syrrhaptes paradoxus: Eurasiatic sandgrouse with a black patch on the belly
tabby: a cat with a grey or tawny coat mottled with black
tachina fly: bristly fly whose larvae live parasitically in caterpillars and other insects; important in control of noxious insects
Tadarida brasiliensis: the common freetail bat of southern United States having short velvety fur; migrates southward for winter
Tadirida femorosacca: small brown bat of California and northern Mexico
tadpole shrimp: a kind of branchiopod crustacean
taenia: tapeworms parasitic in humans which uses the pig as its intermediate host
Tamandua tetradactyla: small toothless anteater with prehensile tail and four-clawed forelimbs; of tropical South America and Central America
Tamias striatus: small striped semiterrestrial eastern American squirrel with cheek pouches
Tamiasciurus douglasi: far western United States counterpart of the red squirrel
Tamiasciurus hudsonicus: of northern United States and Canada
tanager: any of numerous New World woodland birds having brightly colored males
tapir: large inoffensive chiefly nocturnal ungulate of tropical America and southeast Asia having a heavy body and fleshy snout
Tapirus indicus: a tapir found in Malaya and Sumatra
Tapirus terrestris: a tapir found in South America and Central America
tarantula: large hairy tropical spider with fangs that can inflict painful but not highly venomous bites
tardigrade: an arthropod of the division Tardigrada
Taricha granulosa: newt of humid coast from Alaska to southern California
Tarpon atlanticus: large silvery game fish of warm Atlantic coastal waters especially off Florida
tarsier: nocturnal arboreal primate of Indonesia and the Philippines having huge eyes and digits ending in pads to facilitate climbing; the only primate that spurns all plant material as food living entirely on insects and small vertebrates
Tarsius glis: a variety of tarsier
Tarsius syrichta: a variety of tarsier
tattler: any of several long-legged shorebirds having a loud whistling cry
Taurotragus derbianus: large dark striped eland of western equatorial Africa
Taurotragus oryx: dark fawn-colored eland of southern and eastern Africa
Tautoga onitis: large dark-colored food fish of the Atlantic coast of North America
Tautogolabrus adspersus: common in north Atlantic coastal waters of the United States
Tayassu angulatus: dark grey peccary with an indistinct white collar; of semi desert areas of Mexico and southwestern United States
Tayassu pecari: blackish peccary with whitish cheeks; larger than the collared peccary
teal: any of various small short-necked dabbling river ducks of Europe and America
teg: two-year-old sheep
teiid: tropical New World lizard with a long tail and large rectangular scales on the belly and a long tail
teju: large (to 3 feet) blackish yellow-banded South American lizard; raid henhouses; used as food
teleost: a bony fish of the subclass Teleostei
tendrac: small often spiny insectivorous mammal of Madagascar; resembles a hedgehog
Tenrec ecaudatus: prolific animal that feeds chiefly on earthworms
tent caterpillar: the larvae of moths that build and live in communal silken webs in orchard and shade trees
tercel: male hawk especially male peregrine or gyrfalcon
teredo: typical shipworm
termite: whitish soft-bodied ant-like social insect that feeds on wood
tern: small slender gull having narrow wings and a forked tail
terrapin: any of various edible North American web-footed turtles living in fresh or brackish water
terrier: any of several usually small short-bodied breeds originally trained to hunt animals living underground
tetra: brightly colored tropical freshwater fishes
Tetrao urogallus: large black Old World grouse
tetrapod: a vertebrate animal having four feet or legs or leglike appendages
Texas horned lizard: of arid and semiarid open country
Texas longhorn: long-horned beef cattle formerly common in southwestern United States
Texas tortoise: close relative to the desert tortoise; may be reclassified as a member of genus Xerobates
Thalarctos maritimus: white bear of Arctic regions
Thalassoma bifasciatum: small Atlantic wrasse the male of which has a brilliant blue head
Thamnophis sauritus: slender yellow-striped North American garter snake; prefers wet places
Thamnophis sirtalis: a garter snake that is widespread in North America
thecodont: presumably in the common ancestral line to dinosaurs and crocodiles and birds
Thermobia domestica: lives in warm moist areas e.g. around furnaces
thickhead: Australian and southeastern Asian birds with a melodious whistling call
thin-shelled mussel: mussel with thin fragile shells having only rudimentary hinge teeth
Thomomys bottae: of valleys and mountain meadows of western United States
Thomomys talpoides: greyish to brown gopher of western and central United States
Thomson's gazelle: East African gazelle; the smallest gazelle
thornbill: any of various South American hummingbirds with a sharp pointed bill
thoroughbred: a racehorse belonging to a breed that originated from a cross between Arabian stallions and English mares
threadfin: mullet-like tropical marine fishes having pectoral fins with long threadlike rays
three year old: a racehorse that is three years old
Threskiornis aethiopica: African ibis venerated by ancient Egyptians
thrip: any of various small to minute sucking insects with narrow feathery wings if any; they feed on plant sap and many are destructive
Thrips tobaci: injurious to onion plants and sometimes tobacco
thrush: songbirds characteristically having brownish upper plumage with a spotted breast
Thryothorus ludovicianus: large United States wren with a musical call
Thunnus alalunga: large pelagic tuna the source of most canned tuna; reaches 93 pounds and has long pectoral fins; found worldwide in tropical and temperate waters
Thunnus albacares: may reach 400 pounds; worldwide in tropics
Thunnus thynnus: largest tuna; to 1500 pounds; of mostly temperate seas: feed in polar regions but breed in tropics
Thylacinus cynocephalus: rare doglike carnivorous marsupial of Tasmania having stripes on its back; probably extinct
thysanopter: an insect of the order Thysanoptera
thysanuran insect: primitive wingless insects: bristletail
Tibetan mastiff: very large powerful rough-coated dog native to central Asia
Tibetan terrier: breed of medium-sized terriers bred in Tibet resembling Old English sheepdogs with fluffy curled tails
Tichodroma muriaria: crimson-and-grey songbird that inhabits town walls and mountain cliffs of southern Eurasia and northern Africa
tick: any of two families of small parasitic arachnids with barbed proboscis; feed on blood of warm-blooded animals
tiger beetle: active usually bright-colored beetle that preys on other insects
tiger cat: a cat having a striped coat
tiger cub: a young tiger
tiger moth: medium-sized moth with long richly colored and intricately patterned wings; larvae are called woolly bears
tiglon: offspring of a male tiger and a female lion
tigress: a female tiger
Tilapia nilotica: important food fish of the Nile and other rivers of Africa and Asia Minor
timucu: found in warm waters of western Atlantic
Tinca tinca: freshwater dace-like game fish of Europe and western Asia noted for ability to survive outside water
Tinea pellionella: the larvae live in tubes of its food material fastened with silk that it spins
tineid: small yellowish moths whose larvae feed on wool or fur
tineoid: small dull-colored moth with chewing mouthparts
Tineola bisselliella: moth that forms a web in which it lives
tit: small insectivorous birds
titanosaur: amphibious quadrupedal herbivorous dinosaur with a long thin neck and whiplike tail; of the Cretaceous mostly in the southern hemisphere
titi: small South American monkeys with long beautiful fur and long nonprehensile tail
tody: tiny insectivorous West Indian bird having red-and-green plumage and a long straight bill
Tolypeutes tricinctus: South American armadillo with three bands of bony plates
tom: male cat
Tomistoma schlegeli: crocodile of southeast Asia similar to but smaller than the gavial
tonguefish: left-eyed marine flatfish whose tail tapers to a point; of little commercial value
tongueless frog: almost completely aquatic frog native to Africa and Panama and northern South America
tooth shell: any of various seashore mollusks having a tapering tubular shell open at each end and a foot pointed like a spade for burrowing
toothed whale: any of several whales having simple conical teeth and feeding on fish etc.
tortoise: usually herbivorous land turtles having clawed elephant-like limbs; worldwide in arid area except Australia and Antarctica
tortoiseshell: brilliantly colored; larvae feed on nettles
tortricid: any of numerous small moths having lightly fringed wings; larvae are leaf rollers or live in fruits and galls
toucan: brilliantly colored arboreal fruit-eating bird of tropical America having a very large thin-walled beak
toucanet: small toucan
touraco: large brightly crested bird of Africa
towhee: any of numerous long-tailed American finches
Toxostoma rufums: common large songbird of eastern United States having reddish-brown plumage
Toxotes jaculatrix: any of several small freshwater fishes that catch insects by squirting water at them and knocking them into the water; found in Indonesia and Australia
toy Manchester terrier: breed of small Manchester terrier
toy poodle: the breed of very small poodles
toy spaniel: a very small spaniel
toy terrier: a small active dog
toy: any of several breeds of very small dogs kept purely as pets
Trachinotus carolinus: found in coastal waters New England to Brazil except clear waters of West Indies
Trachinotus falcatus: large game fish; found in waters of the West Indies
Trachipterus arcticus: deep-sea ribbonfish
trachodon: large duck-billed dinosaur of the Cretaceous period
Trachurus symmetricus: a California food fish
Trachurus trachurus: large elongated compressed food fish of the Atlantic waters of Europe
Tragelaphus angasi: spiral-horned South African antelope with a fringe of white hairs along back and neck
Tragelaphus buxtoni: shaggy antelope of mountains of Ethiopia
Tragelaphus eurycerus: large forest antelope of central Africa having a reddish-brown coat with white stripes and spiral horns
Tragelaphus imberbis: a smaller variety of kudu
Tragelaphus scriptus: antelope with white markings like a harness and twisted horns
Tragelaphus strepsiceros: a variety of kudu
tragopan: brilliantly colored Asian pheasant having wattles and two fleshy processes on the head
Tragulus Javanicus: chevrotain somewhat larger than the kanchil; found in India and Malaya
Tragulus kanchil: small chevrotain of southeastern Asia
trap-door spider: American spider that constructs a silk-lined nest with a hinged lid
tree creeper: any of numerous South American and Central American birds with a curved bill and stiffened tail feathers that climb and feed like woodpeckers
tree cricket: pale arboreal American cricket noted for loud stridulation
tree frog: arboreal amphibians usually having adhesive disks at the tip of each toe; of southeast Asia and Australia and America
tree frog: any of various Old World arboreal frogs distinguished from true frogs by adhesive suckers on the toes
tree kangaroo: arboreal wallabies of New Guinea and northern Australia having hind and forelegs of similar length
tree shrew: insectivorous arboreal mammal of southeast Asia that resembles a squirrel with large eyes and long sharp snout
tree squirrel: any typical arboreal squirrel
treehopper: small leaping insect that sucks juices of branches and twigs
Triaenodon obseus: smooth dogfish of Pacific and Indian Oceans and Red Sea having white-tipped dorsal and caudal fins
Trialeurodes vaporariorum: whitefly that inhabits greenhouses
triceratops: huge ceratopsian dinosaur having three horns and the neck heavily armored with a very solid frill
Trichechus manatus: sirenian mammal of tropical coastal waters of America; the flat tail is rounded
Trichinella spiralis: parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal muscles
Trichoglossus moluccanus: a kind of lorikeet
Trichophaga tapetzella: larvae feed on carpets and other woolens
trichopteran: caddis fly
Trichosurus vulpecula: bushy-tailed phalanger
Trichys lipura: porcupine of Borneo and Sumatra having short spines and a long tail
Tridacna gigas: a large clam inhabiting reefs in the southern Pacific and weighing up to 500 pounds
triggerfish: any of numerous compressed deep-bodied tropical fishes with sandpapery skin and erectile spines in the first dorsal fin
Trigla lucerna: a kind of gurnard
trilobite: an extinct arthropod that was abundant in Paleozoic times; had an exoskeleton divided into three parts
Trimorphodon lambda: of desert regions of southwestern North America
Trinectes maculatus: useless as food; in coastal streams from Maine to Texas and Panama
Tringa flavipes: a variety of yellowlegs
Tringa melanoleuca: a variety of yellowlegs
Tringa nebularia: large European sandpiper with greenish legs
Tringa totanus: a common Old World wading bird with long red legs
Trinil man: fossil remains found in Java; formerly called Pithecanthropus erectus
Trionyx muticus: river turtle of Mississippi basin; prefers running water
Trionyx spiniferus: river turtle of western United States with a warty shell; prefers quiet water
tripletail: large food fish of warm waters worldwide having long anal and dorsal fins that with a caudal fin suggest a three-lobed tail
triton: tropical marine gastropods having beautifully colored spiral shells
Triturus vulgaris: small semiaquatic salamander
Trogium pulsatorium: a variety of booklouse
Troglodytes aedon: common American wren that nests around houses
Troglodytes troglodytes: small wren of coniferous forests of northern hemisphere
trogon: forest bird of warm regions of the New World having brilliant lustrous plumage and long tails
trombiculid: mite that as nymph and adult feeds on early stages of small arthropods but whose larvae are parasitic on terrestrial vertebrates
trombidiid: mite that in all stages feeds on other arthropods
tropical prawn: edible tropical and warm-water prawn
Tropidoclonion lineatum: secretive snake of city dumps and parks as well as prairies and open woods; feeds on earthworms; of central United States
trotter: a horse trained to trot; especially a horse trained for harness racing
trout: any of various game and food fishes of cool fresh waters mostly smaller than typical salmons
true bug: any of various insects of the order Hemiptera and especially of the suborder Heteroptera
true lobster: large edible marine crustaceans having large pincers on the first pair of legs
true marmoset: a marmoset
true toad: tailless amphibian similar to a frog but more terrestrial and having drier warty skin
true vampire bat: any of various tropical American bats of the family Desmodontidae that bite mammals and birds to feed on their blood
trumpeter: large gregarious crane-like bird of the forests of South America having glossy black plumage and a loud prolonged cry; easily domesticated
tumblebug: any of various dung beetles
tuna: any very large marine food and game fish of the genus Thunnus; related to mackerel; chiefly of warm waters
Tunga penetrans: small tropical flea; the fertile female burrows under the skin of the host including humans
tunicate: primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva
Turdus greyi: robin of Mexico and Central America
Turdus iliacus: small European thrush having reddish flanks
Turdus migratorius: large American thrush having a rust-red breast and abdomen
Turdus philomelos: common Old World thrush noted for its song
Turdus pilaris: medium-sized Eurasian thrush seen chiefly in winter
Turdus torquatus: European thrush common in rocky areas; the male has blackish plumage with a white band around the neck
Turdus viscivorus: large European thrush that feeds on mistletoe berries
Turnix sylvatica: a variety of button quail having stripes
turnstone: migratory shorebirds of the plover family that turn over stones in searching for food
turtle: any of various aquatic and land reptiles having a bony shell and flipper-like limbs for swimming
turtledove: any of several Old World wild doves
tusker: any mammal with prominent tusks (especially an elephant or wild boar)
tussock caterpillar: larva of a tussock moth
twitterer: a bird that twitters
two year old: a racehorse that is two years old
Tylenchus tritici: small roundworm parasitic on wheat
Tympanuchus cupido: the most common variety of prairie chicken
Tympanuchus cupido cupido: extinct prairie chicken
Tympanuchus pallidicinctus: a smaller prairie chicken of western Texas
typical jerboa: small nocturnal jumping rodent with long hind legs; of arid parts of Asia and northern Africa
tyrannid: a passerine bird of the suborder Tyranni
Tyrannosaurus rex: large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; later Cretaceous period in North America
Tyrannus domenicensis domenicensis: a kingbird that breeds in the southeastern United States and winters in tropical America; similar to but larger than the eastern kingbird
Tyrannus tyrannus: large American flycatcher
Tyrannus vociferans: a kingbird seen in the southwestern United States; largely grey with a yellow abdomen
Tyto alba: mottled buff and white owl often inhabiting barns and other structures; important in rodent control
uakari: medium-sized tree-dwelling monkey of the Amazon basin; only New World monkey with a short tail
Uma notata: with long pointed scales around toes; of deserts of United States and Mexico
Umbrina roncador: a fish of the Pacific coast of North America
underwing: moth having dull forewings and brightly colored hind wings
Unguiculata: in former classifications a major division of Mammalia comprising mammals with nails or claws; distinguished from hoofed mammals and cetaceans
unguiculate: a mammal having nails or claws
Ungulata: in former classifications a major division of Mammalia comprising all hoofed mammals; now divided into the orders Perissodactyla (odd-toed ungulates) and Artiodactyla (even-toed ungulates)
Uria aalge: the most frequent variety of murre
Uria lomvia: a variety of murre
Urocyon cinereoargenteus: dark grey American fox; from Central America through southern United States
Uropsilus soricipes: shrew mole of eastern Asia
Urosaurus ornatus: a climbing lizard of western United States and northern Mexico
Ursus arctos: large ferocious bear of Eurasia
Ursus arctos horribilis: powerful brownish-yellow bear of the uplands of western North America
Ursus arctos middendorffi: brown bear of coastal Alaska and British Columbia
Ursus arctos syriacus: yellowish-grey Syrian brown bear
Uta stansburiana: one of the most abundant lizards in the arid western United States
Vanessa atalanta: of temperate Europe and Asia; having black wings with red and white markings
Vanessa virginiensis: American butterfly having dark brown wings with white and golden orange spots
Varanus komodoensis: the largest lizard in the world (10 feet); found on Indonesian islands
Varanus niloticus: destroys crocodile eggs
varment: any usually predatory wild animal considered undesirable; e.g., coyote
velociraptor: small active carnivore that probably fed on protoceratops; possibly related more closely to birds than to other dinosaurs
velvet ant: a solitary wasp of the family Mutillidae; the body has a coat of brightly colored velvety hair and the females are wingless
venomous lizard: any of two or three large heavy-bodied lizards; only known venomous lizards
Venus's flower basket: a deep-water marine sponge having a cylindrical skeleton of intricate glassy latticework; found in the waters of the East Indies and the eastern coast of Asia
Venus's girdle: ctenophore having a ribbon-shaped iridescent gelatinous body
vermin: any of various small animals or insects that are pests; e.g. cockroaches or rats
Vespa crabro: European hornet introduced into the United States
vespertilian bat: a variety of carnivorous bat
Vespertilio murinus: common Eurasian bat with white-tipped hairs in its coat
vespid: mostly social nest-building wasps
Vespula maculata: North American hornet
Vespula maculifrons: small yellow-marked social wasp commonly nesting in the ground
Vespula vulgaris: a variety of vespid wasp
Vicugna vicugna: small wild cud-chewing Andean animal similar to the guanaco but smaller; valued for its fleecy undercoat
vine snake: slender arboreal snake found from southern Arizona to Bolivia
vinegar fly: flies whose larvae feed on pickles and imperfectly sealed preserves
viper: venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw
Vipera aspis: of southern Europe; similar to but smaller than the adder
Vipera berus: small terrestrial viper common in northern Eurasia
vireo: any of various small insectivorous American birds chiefly olive-grey in color
Vireo olivaceous: of northern North America having red irises and an olive-grey body with white underparts
Vireo solitarius: of eastern North America having a bluish-grey head and mostly green body
Vireo solitarius solitarius: common vireo of northeastern North America with bluish slaty-grey head
Virginia oyster: common edible oyster of Atlantic coast of North America
Viverra zibetha: common civet of India and southeast Asia
Viverricula malaccensis: a common civet of southeast Asia
viverrine: small cat-like predatory mammals of warmer parts of the Old World
vixen: a female fox
Vulpes fulva: New World fox; often considered the same species as the Old World fox
Vulpes macrotis: small grey fox of southwestern United States; may be a subspecies of Vulpes velox
Vulpes velox: small grey fox of the plains of western North America
Vulpes vulpes: the common Old World fox; having reddish-brown fur; commonly considered a single circumpolar species
Vultur gryphus: large vulture of the high Andes having black plumage and white neck ruff
vulture: any of various large diurnal birds of prey having naked heads and weak claws and feeding chiefly on carrion
wader: any of many long-legged birds that wade in water in search of food
wagtail: Old World bird having a very long tail that jerks up and down as it walks
Walker foxhound: an American breed of foxhound
War Admiral: thoroughbred that won the triple crown in 1937
warble fly: hairy bee-like fly whose larvae produce lumpy abscesses (warbles) under the skin of cattle
warbler: a small active songbird
warhorse: horse used in war
warragal: Australian wild horse
warthog: African wild swine with warty protuberances on the face and large protruding tusks
wasp: social or solitary hymenopterans typically having a slender body with the abdomen attached by a narrow stalk and having a formidable sting
water beetle: any of numerous aquatic beetles usually having a smooth oval body and flattened hind legs for swimming
water bird: freshwater aquatic bird
water bug: a true bug: large aquatic bug adapted to living in or on the surface of water
water dog: a dog accustomed to water and usually trained to retrieve waterfowl
water moccasin: any of numerous North American water snakes inhabiting fresh waters
water rat: any of various amphibious rats
water scorpion: long-legged aquatic insect having the front legs fitted for seizing and holding prey and the abdomen extended by a long breathing tube
water shrew: any of several small semiaquatic shrews usually living near swift-flowing streams
water snake: any of various mostly harmless snakes that live in or near water
water spaniel: any dog of two large curly-coated breeds used for hunting waterfowl
water thrush: brownish North American warbler found near streams
waterbuck: any of several large African antelopes of the genus Kobus having curved ridged horns and frequenting e.g. swamps and rivers
waterdog: any of several large aquatic salamanders
wax insect: any of various insects that secrete a waxy substance
waxwing: brown velvety-plumaged songbirds of the northern hemisphere having crested heads and red waxy wing tips
weasel: small carnivorous mammal with short legs and elongated body and neck
weaver: finch-like African and Asian colonial birds noted for their elaborately woven nests
web spinner: any of a small order of slender typically tropical insects that nest in colonies in silken tunnels that they spin
web-spinning mite: a mite that spins a web
web-toed salamander: any of several salamanders with webbed toes and very long extensile tongues; excellent climbers that move with ease over smooth rock surfaces
webworm: several gregarious moth larvae that spin webs over foliage on which they feed
webworm moth: a variety of moth that spins a web in which it lives
weevil: any of several families of mostly small beetles that feed on plants and plant products; especially snout beetles and seed beetles
Weimaraner: large breed of hound having a smooth greyish coat; originated in Germany
Welsh Black: a breed of dual-purpose cattle developed in Wales
Welsh corgi: either of two Welsh breeds of long-bodied short-legged dogs with erect ears and a fox-like head
Welsh pony: breed of small ponies originally from Wales
Welsh springer spaniel: a red-and-white breed slightly smaller than the English springer spaniel
Welsh terrier: wire-haired terrier resembling Airedales but smaller; developed in Wales for hunting
West Highland white terrier: small white long-coated terrier developed in Scotland
Western box turtle: primarily a prairie turtle of western United States and northern Mexico
Western diamondback rattlesnake: largest and most dangerous North American snake; of southwestern United States and Mexico
Western rattlesnake: widely distributed between the Mississippi and the Rockies
Western ribbon snake: yellow- or reddish-striped snake of temperate woodlands and grasslands to tropics
wether: male sheep especially a castrated one
whale: any of the larger cetacean mammals having a streamlined body and breathing through a blowhole on the head
whale louse: amphipod crustacean parasitic on cetaceans
wharf rat: brown rat that infests wharves
wheatear: small songbird of northern America and Eurasia having a distinctive white rump
wheel horse: a draft horse harnessed behind others and nearest the wheels of a vehicle
whelk: large carnivorous marine gastropods of coastal waters and intertidal regions having a strong snail-like shell
whidah: mostly black African weaverbird
whiff: a lefteye flounder found in coastal waters from New England to Brazil
whip scorpion: nonvenomous arachnid that resembles a scorpion and that has a long thin tail without a stinger
whip snake: any of several small fast-moving snakes with long whiplike tails
whippet: small slender dog of greyhound type developed in England
whiptail: any of numerous very agile and alert New World lizards
Whirlaway: thoroughbred that won the triple crown in 1941
whirligig beetle: aquatic beetle that circles rapidly on the water surface
white elephant: albinic Indian elephant; rare and sometimes venerated in east Asia
whitebait: the edible young of especially herrings and sprats and smelts
whitefish: silvery herring-like freshwater food fish of cold lakes of the northern hemisphere
whitefly: minute insect that feeds on plant juices; related to scale insects
whiting: any of several food fishes of North American coastal waters
whiting: a small fish of the genus Sillago; excellent food fish
wiggler: larva of a mosquito
wild ass: any of several equine mammals of Asia and northeast Africa
wild dog: any of various undomesticated mammals of the family Canidae that are thought to resemble domestic dogs as distinguished from jackals or wolves
wild duck: an undomesticated duck (especially a mallard)
wild goat: undomesticated goat
wild horse: undomesticated or feral domestic horse
wild sheep: undomesticated sheep
wildcat: any small or medium-sized cat resembling the domestic cat and living in the wild
Wilson's blackcap: yellow wood warbler with a black crown
wire-haired fox terrier: a fox terrier with wiry hair
wirehair: a terrier with wiry hair
wireworm: wormlike larva of various elaterid beetles; feeds on roots of many crop plants
wolf: any of various predatory carnivorous canine mammals of North America and Eurasia that usually hunt in packs
wolf cub: a young wolf
wolfhound: the largest breed of dogs; formerly used to hunt wolves
wombat: burrowing herbivorous Australian marsupials about the size of a badger
wood drake: male wood duck
wood hoopoe: tropical African bird having metallic blackish plumage but no crest
wood mouse: any of various New World woodland mice
wood rat: any of various small short-tailed rodents of the northern hemisphere having soft fur grey above and white below with furred tails and large ears; some are hosts for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)
woodcock: game bird of the sandpiper family that resembles a snipe
woodworm: a larva of a woodborer
woolly adelgid: an insect that feeds on hemlocks; its egg sacs are small fuzzy white balls like artificial snow on a Christmas tree
woolly aphid: secretes a waxy substance like a mass of fine curly white cotton or woolly threads
woolly bear moth: larva of moth of the family Arctiidae
woolly bear: caterpillar of numerous moths characterized by a dense coat of woolly hairs; feed on plants and some are destructive pests
woolly monkey: large monkeys with dark skin and woolly fur of the Amazon and Orinoco basins
work animal: an animal trained for and used for heavy labor
worker: sterile member of a colony of social insects that forages for food and cares for the larvae
worker bee: sterile bee specialized to collect food and maintain the hive
workhorse: a horse used for plowing and hauling and other heavy labor
working dog: any of several breeds of usually large powerful dogs bred to work as draft animals and guard and guide dogs
worm: any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae
worm fish: poorly known family of small tropical shallow-water fishes related to gobies
worm lizard: a lizard of the genus Amphisbaena; harmless wormlike limbless lizard of warm or tropical regions having concealed eyes and ears and a short blunt tail
wrasse: chiefly tropical marine fishes with fleshy lips and powerful teeth; usually brightly colored
wren warbler: small Asiatic and African bird; constructs nests like those of tailorbirds
wryneck: Old World woodpecker with a peculiar habit of twisting the neck
Xenicus gilviventris: short-tailed bird resembling a wren
Xenorhyncus asiaticus: large mostly white Australian stork
Xestobium rufovillosum: bores through wood making a ticking sound popularly thought to presage death
Xiphias gladius: large toothless marine food fish with a long swordlike upper jaw; not completely cold-blooded i.e. they are able to warm their brains and eyes: worldwide in warm waters but feed on cold ocean floor coming to surface at night
Xiphosurus polyphemus: large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail; a living fossil related to the wood louse
Xyphophorus helleri: freshwater fish of Central America having a long swordlike tail; popular aquarium fish
yearling: an animal in its second year
yearling: a racehorse considered one year old until the second Jan. 1 following its birth
yellowlegs: either of two North American shorebird with yellow legs
yellowthroat: small olive-colored American warblers with yellow breast and throat
Yorkshire terrier: very small breed having a long glossy coat of bluish-grey and tan
Yosemite toad: of high Sierra Nevada meadows and forest borders
young bird: a bird that is still young
young fish: a fish that is young
young mammal: any immature mammal
Zalophus californianus: often trained as a show animal
Zapus hudsonius: widely distributed in northeastern and central United States and Canada
zebra: any of several fleet black-and-white striped African equines
zebu: domesticated ox having a humped back and long horns and a large dewlap; used chiefly as a draft animal in India and east Asia
Zenaidura macroura: wild dove of the United States having a mournful call
Zeus faber: European dory
Zoarces viviparus: an eelpout of northern Europe that is viviparous
Zonotrichia albicollis: common North American finch with a white patch on the throat and black-and-white striped crown
Zonotrichia leucophrys: finch with black-and-white striped crown
zoophyte: any of various invertebrate animals resembling a plant such as a sea anemone or coral or sponge
zooplankton: animal constituent of plankton; mainly small crustaceans and fish larvae