Nouns denoting animals

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
the fourth compartment of the stomach of a ruminant; the one where digestion takes place
a human fetus whose weight is less than 0.5 kilogram when removed or expelled from the mother's body
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
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
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
very small free-living arachnid that is parasitic on animals or plants; related to ticks
mite or tick
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
an organism that thrives in a relatively acid environment
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
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
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
any sea anemone or related animal
soil-inhabiting saprophytes and disease-producing plant and animal parasites
any bacteria (some of which are pathogenic for humans and animals) belonging to the order Actinomycetales
parasites of worms
protozoa having stiff rodlike radiating pseudopods
sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed
Actitis macularia
common North American sandpiper
small spiny outgrowth on the wings of certain insects
a sharp-pointed process especially a sting of a hymenopterous insect
Adalia bipunctata
red ladybug with a black spot on each wing
Adapid group
extinct small mostly diurnal lower primates that fed on leaves and fruit; abundant in North America and Europe 30 to 50 million years ago; their descendents probably include the lemurs; some authorities consider them ancestral to anthropoids but others consider them only cousins
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
any of various insects that feed and form galls on conifers
Adenota vardoni
an African antelope closely related to the waterbuck
any of a group of viruses including those that in humans cause upper respiratory infections or infectious pinkeye
any of several brightly colored butterflies
any mature animal
Aedes aegypti
mosquito that transmits yellow fever and dengue
small medusa
Aegypius monachus
of southern Eurasia and northern Africa
extinct primate of about 38 million years ago; fossils found in Egypt
Aepyceros melampus
African antelope with ridged curved horns; moves with enormous leaps
huge (to 9 ft.) extinct flightless bird of Madagascar
Aerobacter aerogenes
a species of Gram-negative aerobic bacteria that produce gas and acid from sugars and are sometimes involved in the souring of milk
an organism (especially a bacterium) that requires air or free oxygen for life
Aetobatus narinari
ray with back covered with white or yellow spots; widely distributed in warm seas
European breed of small dog resembling a terrier with dark wiry hair and a tufted muzzle
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
tall large-horned humped cattle of South Africa; used for meat or draft
Afropavo congensis
both sexes are brightly colored
a supplementary feather (usually small) on the underside of the base of the shaft of some feathers in some birds
small terrestrial lizard of warm regions of the Old World
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
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
Agrobacterium tumefaciens
the bacteria that produce crown gall disease in plants
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
air bladder
an air-filled sac near the spinal column in many fishes that helps maintain buoyancy
air sac
any of the membranous air-filled extensions of the lungs of birds
air sac
any of the thin-walled extensions of the tracheae of insects
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
a wing of an insect
Alaskan malamute
breed of sled dog developed in Alaska
Alauda arvensis
brown-speckled European lark noted for singing while hovering at a great height
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
primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves
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
the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)
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
either of two amphibious reptiles related to crocodiles but with shorter broader snouts
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
an arbovirus of the family Togaviridae that can cause a variety of encephalitis in horses
Alsophila pometaria
North American moth with grey-winged males and wingless females; larvae are fall cankerworms
tuft of small stiff feathers on the first digit of a bird's wing
scalelike structure between the base of the wing and the halter of a two-winged fly
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
red Asian weaverbirds often kept as cage birds
mainly green tropical American parrots
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
one of the five areas on the undersurface of an echinoderm on which the tube feet are located
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
small to moderate-sized terrestrial or semiaquatic New World salamander
naked freshwater or marine or parasitic protozoa that form temporary pseudopods for feeding and locomotion
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
thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
higher vertebrates (reptiles, birds and mammals) possessing an amnion during development
any member of the Amniota
cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form
amphibian family
any family of amphibians
amphibian genus
any genus of amphibians
(genetics) an organism or cell having a diploid set of chromosomes from each parent
small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates
a kind of malacostracan crustacean
Amphiprion percula
an anemone fish of the genus Amphiprion
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
an organism (especially a bacterium) that does not require air or free oxygen to live
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
extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian
one of the largest and most famous duck-billed dinosaurs
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
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
marine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton
a butterfly fish of the genus Pomacanthus
nymphalid butterfly having angular notches on the outer edges of the forewings
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
fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill
black tropical American cuckoo
animal foot
the pedal extremity of vertebrates other than human beings
animal leg
the leg of an animal
animal order
the order of animals
animal virus
an animal pathogen that is a virus
microscopic organism such as an amoeba or paramecium
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
having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's
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
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
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
social insect living in organized colonies; characteristically the males and fertile queen have wings during breeding season; wingless sterile females are the workers
a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea
a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia
toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites
graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles; springboks; impalas; addax; gerenuks; blackbucks; dik-diks
one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste
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
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
deciduous horn of a member of the deer family
Antrozous pallidus
drab yellowish big-eared bat that lives in caves
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
any of various primates with short tails or no tail at all
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
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
ridge-like ingrowth of the exoskeleton of an arthropod that supports internal organs and provides attachment points for muscles
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
large siphonophore of up to 50 ft long
a hardy breed of saddle horse developed in western North America and characteristically having a spotted rump
free-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates
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
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
a spirited graceful and intelligent riding horse native to Arabia
air-breathing arthropods characterized by simple eyes and four pairs of legs
an edible seaweed with a mild flavor
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
a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis
an amoeba-like protozoan with a chitinous shell resembling an umbrella
considered ancient life forms that evolved separately from bacteria and blue-green algae
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
extinct primitive toothed bird with a long feathered tail and three free clawed digits on each wing
central cavity of the gastrula; becomes the intestinal or digestive cavity
small primitive marine worm lacking external segmentation and resembling polychaete larvae
Archidiskidon imperator
largest known mammoth; of America
Archilochus colubris
a kind of hummingbird
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
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
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
common turnstone of the Pacific coast of North America
a family of arborviruses carried by arthropods
animal viruses belonging to the family Arenaviridae
tick lacking a dorsal shield and having mouth parts on the under side of the head
any of various small silver-scaled salmon-like marine fishes
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
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
bristlelike process near the tip of the antenna of certain flies
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
burrowing chiefly nocturnal mammal with body covered with strong horny plates
tough more-or-less rigid protective covering of an animal or plant
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
larva of fungus gnat that feed on cereals and other grains; they march in large companies in regular order when the food is exhausted
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
invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
arthropod family
any of the arthropods
arthropod genus
a genus of arthropods
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
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
Ascophyllum nodosum
similar to and found with black rockweed
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
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
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
black-and-white short-necked web-footed diving bird of northern seas
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 bonytongue
a species of large fish found in Australian rivers
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
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
long-legged web-footed black-and-white shorebird with slender upward-curving bill
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
aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
child's word for a sheep or lamb
any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae
large terrestrial monkeys having doglike muzzles
a very young mammal
baby bird
young bird not yet fledged
Babyrousa Babyrussa
Indonesian wild pig with enormous curved canine teeth
Bacillus anthracis
a species of bacillus that causes anthrax in humans and in animals (cattle and swine and sheep and rabbits and mice and guinea pigs); can be used a bioweapon
Bacillus subtilis
a species of bacillus found in soil and decomposing organic matter; some strains produce antibiotics
bacteria family
a family of bacteria
bacteria genus
a genus of bacteria
bacteria order
an order of bacteria
bacteria species
a species of bacteria
(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants
a substance in photosensitive bacteria that is related to but different from chlorophyll of higher plants
a virus that is parasitic (reproduces itself) in bacteria
a rodlike bacterium (especially any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants)
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
mammary gland of bovids (cows and sheep and goats)
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
either of the rudimentary hind wings of dipterous insects; used for maintaining equilibrium during flight
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
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
a horse bred for racing
Bankia setaceae
giant shipworm of the Pacific coast of North America
any of various small breeds of fowl
one of the parallel filaments projecting from the main shaft of a feather
slender tactile process on the jaws of a fish
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
informal terms for dogs
barking deer
small Asian deer with small antlers and a cry like a bark
marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces
a dinosaur that could grow to be as tall as a building five stories tall
a large marine food fish common on the coasts of Australia, New Zealand, and southern Africa
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
small smooth-haired breed of African origin having a tightly curled tail and the inability to bark
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
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
smooth-haired breed of hound with short legs and long ears
nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate
bottom-dweller of warm western Atlantic coastal waters having a flattened scaleless body that crawls about on fleshy pectoral and pelvic fins
a horse of a moderate reddish-brown color
beach flea
small amphipod crustaceans that hop like fleas; common on ocean beaches
a small short-legged smooth-coated breed of hound
beaklike mouth of animals other than birds (e.g., turtles)
horny projecting mouth of a bird
beaked whale
any of several whales inhabiting all oceans and having beaklike jaws with vestigial teeth in the upper jaw
massive plantigrade carnivorous or omnivorous mammals with long shaggy coats and strong claws
bear claw
claw of a bear; often used in jewelry
bear cub
a young bear
hairy growth on or near the face of certain mammals
beard worm
slender animal with tentacles and a tubelike outer covering; lives on the deep ocean bottom
tuft of strong filaments by which e.g. a mussel makes itself fast to a fixed surface
beast of burden
an animal such as a donkey or ox or elephant used for transporting loads or doing other heavy work
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
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
cattle that are reared for their meat
hardy breed of cattle resulting from crossing domestic cattle with the American buffalo; yields leaner beef than conventional breeds
insect having biting mouthparts and front wings modified to form horny covers overlying the membranous rear wings
a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae
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
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
sheep that leads the herd often wearing a bell
the underpart of the body of certain vertebrates such as snakes or fish
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
delicately iridescent thimble-shaped ctenophores
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
young bird especially of domestic fowl
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
red fishes of American coastal tropical waters having very large eyes and rough scales
giant warm-water game fish having a prolonged and rounded toothless upper jaw
elongate European surface-dwelling predacious fishes with long toothed jaws; abundant in coastal waters
male goat
an animal with two feet
biplane flying fish
having both pectoral and pelvic fins enlarged
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 family
a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings
bird genus
a genus of 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's foot
the foot of a bird
bird-footed dinosaur
any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs
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
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
relatively small compact tawny-brown heron with nocturnal habits and a booming cry; found in marshes
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
female salmon that has recently spawned
bladder worm
encysted saclike larva of the tapeworm
important marine food fishes
Blarina brevicauda
North American shrew with tail less than half its body length
the fluid-filled cavity inside a blastula
the blastula of a placental mammal in which some differentiation of cells has occurred
a layer of cells on the inside of the blastula
any cell resulting from cleavage of a fertilized egg
the opening into the archenteron
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
elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins
Blennius pholis
European scaleless 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
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
a breed of large powerful hound of European origin having very acute smell and used in tracking
carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end
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
large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales; dolphins; porpoises; narwhals
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
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
blue-green algae
predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyll; occur singly or in colonies in diverse habitats; important as phytoplankton
diving ducks of North America having a bluish-grey bill
blue North American songbird
fruit-eating mostly brilliant blue songbird of the East Indies
a very fast American hound; white mottled with bluish grey
any of several chiefly tropical constrictors with vestigial hind limbs
an uncastrated male hog
fish with large eyes and long snouts
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
a short or shortened tail of certain animals
a popular North American game bird; named for its call
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
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
any of various scombroid fishes intermediate in size and characteristics between mackerels and tunas
gull-like jaeger of northern seas
bony fish
any fish of the class Osteichthyes
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
any of various insects or larvae or mollusks that bore into wood
cause of e.g. European and African relapsing fever
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
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
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
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
a fish that lives and feeds on the bottom of a body of water
a scavenger that feeds low on the food chain
Bouviers des Flandres
rough-coated breed used originally in Belgium for herding and guarding cattle
hollow-horned ruminants
any of various members of the genus Bos
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
a breed of stocky medium-sized short-haired dog with a brindled coat and square-jawed muzzle developed in Germany
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
marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide
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
respiratory organ of aquatic animals that breathe oxygen dissolved in water
branchial arch
one of the bony or cartilaginous arches on each side of the pharynx that support the gills of fishes and aquatic amphibians
branchial cleft
one of a series of slit openings in the pharynxes of fishes and aquatic amphibians through which water passes
aquatic crustaceans typically having a carapace and many pairs of leaflike appendages used for swimming as well as respiration and feeding
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
any of various usually edible freshwater percoid fishes having compressed bodies and shiny scales; especially (but not exclusively) of the genus Lepomis
any of numerous marine percoid fishes especially (but not exclusively) of the family Sparidae
the part of an animal's body that corresponds to a person's chest
Brevoortia tyrannis
shad-like North American marine fishes used for fish meal and oil and fertilizer
old French breed of large strong usually black dogs having a long tail and long wavy and slightly stiff coat
a stiff hair
small wingless insect with a long bristlelike tail
the young of a herring or sprat or similar fish
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
small birds of the Old World tropics having bright plumage and short wide bills
hardy coarse-haired sheep of central Asia; lambs are valued for their soft curly black fur
male red deer in its second year
small South American deer with unbranched antlers
an unbroken or imperfectly broken mustang
brood bitch
a bitch used for breeding
brood hen
a domestic hen ready to brood
a female horse used for breeding
Brosme brosme
large edible marine fish of northern coastal waters; related to cod
deep-sea fishes
brown algae
algae having the chlorophyll masked by brown and yellow pigments
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
an aerobic Gram-negative coccobacillus that causes brucellosis; can be used as a bioweapon
Bruchus pisorum
larvae live in and feed on seeds of the pea plant
a conventional name for a bear used in tales following usage in the old epic `Reynard the Fox'
a bushy tail or part of a bushy tail (especially of 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
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
mature male of various mammals (especially deer or antelope)
bucking bronco
a wild horse that is vicious and difficult or impossible to break in
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
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
general term for any insect or similar creeping or crawling invertebrate
a minute life form (especially a disease-causing bacterium); the term is not in technical use
insects with sucking mouthparts and forewings thickened and leathery at the base; usually show incomplete metamorphosis
nightingale spoken of in Persian poetry
mature male of various mammals of which the female is called `cow'; e.g. whales or elephants or especially cattle
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
mainly nocturnal North American goatsucker
bulldog ant
any of the large fierce Australian ants of the genus Myrmecia
freshwater sculpin with a large flattened bony-plated head with hornlike spines
any of several common freshwater catfishes of the United States
young bull
castrated bull
robust hairy social bee of temperate regions
Bungarus fasciatus
sluggish krait banded with black and yellow
(usually informal) especially a young rabbit
any of numerous seed-eating songbirds of Europe or North America
a large family of arboviruses that affect a wide range of hosts (mainly vertebrates and arthropods)
an animal virus belonging to the family Bunyaviridae; can be used as a bioweapon
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
any of several fishes having rigid flattened spines
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
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
large carnivorous Australian bird with the shrike-like habit of impaling prey on thorns
shrikes that impale their 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
any hawk of the genus Buteo
small marine fish with a short compressed body and feeble spines
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
tropical fish with huge fanlike pectoral fins for underwater gliding; unrelated to searobins
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
black-and-red or black-and-yellow orioles of the American tropics
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
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
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
small rough-haired breed of terrier from Scotland
Calamus penna
from Florida and Bahamas to Brazil
the hollow spine of a feather
young of domestic cattle
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
a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp)
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
any beetle of the genus Calosoma
Calosoma scrutator
large metallic blue-green beetle that preys on caterpillars; found in North America
Calymmatobacterium granulomatis
the species of bacteria that causes granuloma inguinale
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
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
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
green caterpillar of a geometrid moth; pest of various fruit and shade trees
cannon bone
greatly developed metatarsal or metacarpal bone in the shank or cannon part of the leg in hoofed mammals
lower part of the leg extending from the hock to the fetlock in hoofed mammals
very small northern fish; forage for sea birds and marine mammals and other fishes
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
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
the outer covering of protein surrounding the nucleic acid of a virus
a variety of leaf bug
water buffalo of the Philippines
carabid beetle
predacious shining black or metallic terrestrial beetle that destroys many injurious insects
any of various long-legged carrion-eating hawks of South America and Central America
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
hard outer covering or case of certain organisms such as arthropods and turtles
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
the dead body of an animal especially one slaughtered and dressed for food
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
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
small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals
birds having keeled breastbones for attachment of flight muscles
Carniolan bee
greyish highly productive European honeybee that has a quiet disposition
any animal that feeds on flesh
a terrestrial or aquatic flesh-eating mammal
carnivorous bat
typically having large ears and feeding primarily on insects; worldwide in distribution
large carnivorous bipedal dinosaur having huge claws
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
(genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele; the associated trait is not apparent but can be passed on to offspring
carrier pigeon
a homing pigeon used to carry messages
the dead and rotting body of an animal; unfit for human food
cart horse
draft horse kept for pulling carts
cartilaginous fish
fishes in which the skeleton may be calcified but not ossified
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
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
feline mammal usually having thick soft fur and no ability to roar: domestic cats; wildcats
short-tailed wildcats with usually tufted ears; valued for their fur
a wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth
any of numerous mostly freshwater bottom-living fishes of Eurasia and North America with barbels like whiskers around the mouth
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
a cypriniform fish of the family Catostomidae
caudal appendage
tail especially of a mammal posterior to and above the anus
caudal fin
the tail of fishes and some other aquatic vertebrates
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
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
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
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
extinct jawless fish of the Devonian with armored head
fish-like animals having a notochord rather than a true spinal column
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
one of the often brightly colored and branching hornlike structures on the back of the nudibranch (and other related mollusks) that serve as gills
Cerastes cornutus
highly venomous viper of northern Africa and southwestern Asia having a horny spine above each eye
extinct lungfish
any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia
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
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
the fleshy, waxy covering at the base of the upper beak of some birds
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
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
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
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
a stiff chitinous seta or bristle especially of an annelid worm
Chaetodipterus faber
deep-bodied disk-shaped food fish of warmer western Atlantic coastal waters
any fish of the genus Chaetodon
one of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell
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
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
any of several small trout-like fish of the genus Salvelinus
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
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
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
passerine bird of New World tropics
Chauna torquata
largest crested screamer; native to southern Brazil and Argentina
a grasping structure on the limb of a crustacean or other arthropods
either of the first pair of fang-like appendages near the mouth of an arachnid; often modified for grasping and piercing
Chelifer cancroides
minute arachnid sometimes found in old papers
Chelonia mydas
large tropical turtle with greenish flesh used for turtle soup
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
a half-grown quahog
Chesapeake Bay retriever
American breed having a short thick oily coat ranging from brown to light tan
a dark golden-brown or reddish-brown horse
a small horny callus on the inner surface of a horse's leg
hardy hornless sheep of the Cheviot Hills noted for its short thick wool
very small hornless deer-like ruminant of tropical Asia and west Africa
Chiacoan peccary
a recently discovered large wild pig of Paraguay
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
larval mite that sucks the blood of vertebrates including human beings causing intense irritation
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
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
backbone of an animal
Chinese paddlefish
fish of larger rivers of China similar to the Mississippi paddlefish
a burrowing ground squirrel of western America and Asia; has cheek pouches and a light and dark stripe running down the body
primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates
Chlamydera nuchalis
large bowerbird of northern Australia
coccoid rickettsia infesting birds and mammals; cause infections of eyes and lungs and genitourinary tract
Chlamydia psittaci
bacteria responsible for the sexually transmitted disease chlamydia
Chlamydia trachomatis
bacteria responsible for the sexually transmitted diseases chlamydia and lymphogranuloma venereum
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
any alga of the genus Chlorella
the chlorophyll present in brown algae, diatoms, and flagellates
Chlorophoneus nigrifrons
a kind of bush shrike
any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms
chlorophyll a
a blue-black plant pigment having a blue-green alcohol solution; found in all higher plants
chlorophyll b
a dark-green plant pigment having a brilliant green alcohol solution; generally characteristic of higher plants
chlorophyll d
the chlorophyll found (together with chlorophyll a) in red algae
algae that are clear green in color; often growing on wet ricks or damp wood or the surface of stagnant water
Chlorura chlorura
towhee of the Rocky Mountains
any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body
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
Chondrus crispus
dark purple edible seaweed of the Atlantic coasts of Europe and North America
the area of mesoderm that forms the notochord
any animal of the phylum Chordata having a notochord or spinal column
chordate family
any family in the phylum Chordata
chordate genus
any genus in the phylum Chordata
chorioallantoic membrane
the very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois
the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
chorionic villus
one of the tiny villi that stick out of the fetal chorion and combine with the mother's uterine tissue to form the placenta
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
a European corvine bird of small or medium size with red legs and glossy black plumage
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)
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
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
pale green unpleasant-smelling lacewing fly having carnivorous larvae
Chunga burmeisteri
Argentinian Cariama
church mouse
a fictional mouse created by Lewis Carroll
stout-bodied insect with large membranous wings; male has drum-like organs for producing a high-pitched drone
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
a protozoan with a microscopic appendage extending from the surface of the cell
a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms
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
a slender flexible animal appendage as on barnacles or crinoids or many insects; often tactile
Cistothorus palustris
American wren that inhabits tall reed beds
Cistothorus platensis
small American wren inhabiting wet sedgy meadows
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
cat-like mammal typically secreting musk used in perfumes
Cladorhyncus leucocephalum
web-footed Australian stilt with reddish-brown pectoral markings
burrowing marine mollusk living on sand or mud; the shell closes with viselike firmness
the shell of a clam
Clangula hyemalis
a common long-tailed sea duck of the northern parts of the United States
class Actinozoa
a large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed
class Amphibia
the class of vertebrates that live on land but breed in water; frogs; toads; newts; salamanders; caecilians
class Aphasmidia
one of two subgroups of Nematoda used in some classification systems
class Arachnida
a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings
class Archiannelida
a class of Annelida
class Ascidiaceae
sometimes classified as an order: sea squirts
class Asteroidea
sea stars
class Aves
(ornithology) the class of birds
class Bacillariophyceae
marine and freshwater eukaryotic algae: diatoms
class Cephalopoda
octopuses; squids; cuttlefish; pearly nautilus
class Cestoda
class Channidae
class Charophyceae
in some classifications: contains only the order Charales
class Chilopoda
arthropods having the trunk composed of numerous somites each bearing one pair of legs: centipedes
class Chlorophyceae
algae distinguished chiefly by having flagella and a clear green color, their chlorophyll being masked little if at all by other pigments
class Chondrichthyes
cartilaginous fishes
class Chrysophyceae
all the yellow-green algae having flagella of unequal length
class Ciliophora
class of protozoa having cilia or hairlike appendages on part or all of the surface during some part of the life cycle
class Crinoidea
sea lilies
class Crustacea
class of mandibulate arthropods including: lobsters; crabs; shrimps; woodlice; barnacles; decapods; water fleas
class Cryptophyceae
motile usually brownish-green protozoa-like algae
class Cyanobacteria
photosynthetic bacteria found in fresh and salt water, having chlorophyll a and phycobilins; once thought to be algae: blue-green algae
class Cyclosporeae
in more recent classifications superseded by the order Fucales
class Echinoidea
sea urchins and sand dollars
class Euglenophyceae
coextensive with the division Euglenophyta
class Gasteropoda
snails and slugs and their relatives
class Hexapoda
insects; about five-sixths of all known animal species
class Hirudinea
hermaphroditic aquatic or terrestrial or parasitic annelids
class Holothuroidea
class of echinoderms including the sea cucumbers
class Hyalospongiae
sponges with siliceous spicules that have six rays; choanocytes are restricted to finger-shaped chambers
class Hydrozoa
coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes
class Lamellibranchia
oysters; clams; scallops; mussels
class Larvacea
small free-swimming tunicates; sometimes classified as an order
class Mammalia
warm-blooded vertebrates characterized by mammary glands in the female
class Mastigophora
protozoa having flagella
class Merostomata
used in some classifications; includes the orders Xiphosura and Eurypterida
class Myriapoda
arthropods having the body composed of numerous double somites each with two pairs of legs: millipedes
class Nuda
ctenophores lacking tentacles; comprises one genus: beroe
class Oligochaeta
class Onychophora
enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions; distinct from the phylum Annelida; resemble slugs with legs and are sometimes described as the missing link between arthropods and annelids
class Ophiuroidea
brittle stars and basket stars
class Osteichthyes
a class of fish having a skeleton composed of bone in addition to cartilage
class Pauropoda
an obscure class of minute arthropods with branched antennae and 8 to 10 pairs of legs
class Phaeophyceae
brown algae; mostly marine and littoral eukaryotic algae
class Phasmidia
one of two subgroups of Nematoda used in some classification systems
class Placodermi
extinct group of bony-plated fishes with primitive jaws
class Polychaeta
marine annelid worms
class Polyplacophora
small class of marine mollusks comprising the chitons; sometimes considered an order of the subclass Amphineura
class Reptilia
class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animals
class Rhodophyceae
coextensive with the Rhodophyta: red algae
class Sarcodina
characterized by the formation of pseudopods for locomotion and taking food: Actinopoda; Rhizopoda
class Scaphopoda
small class of bilaterally symmetrical marine forms comprising the tooth shells
class Schizomycetes
a former classification
class Scyphozoa
coelenterates in which the polyp stage is absent or at least inconspicuous: jellyfishes
class Sporozoa
strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites
class Symphyla
small class of minute arthropods; unimportant except for the garden centipede
class Tardigrada
in some classifications considered a separate phylum: microscopic arachnid-like invertebrates living in water or damp moss having 4 pairs of legs and instead of a mouth a pair of stylets or needlelike piercing organs connected with the pharynx
class Tentaculata
ctenophores have retractile tentacles
class Thaliacea
small class of free-swimming tunicates; sometimes classified as an order
class Trematoda
parasitic flatworms (including flukes)
class Turbellaria
free-living flatworms
class Ulvophyceae
alternative name for the class Chlorophyceae in some classifications
class Xanthophyceae
yellow-green algae
sharp curved horny process on the toe of a bird or some mammals or reptiles
a bird's foot
large swift fly the female of which sucks blood of various animals
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
very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.
mostly small blennioid fishes of coral reefs and seagrass beds
spindle-shaped bacterial cell especially one swollen at the center by an endospore
Clostridium botulinum
anaerobic bacterium producing botulin the toxin that causes botulism
clostridium perfringens
anaerobic Gram-positive rod bacterium that produces epsilon toxin; can be used as a bioweapon
clothes moth
any of several small yellowish or buff-colored moths whose larvae eat organic matter e.g. woolens
cloven foot
a hoof divided into two parts at its distal extremity (as of ruminants or swine)
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
any of numerous soft-finned schooling food fishes of shallow waters of northern seas
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
a shield-like plate on the front of an insect's head
any of a group of herpes viruses that enlarge epithelial cells and can cause birth defects; can affect humans with impaired immunological systems
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
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
growth of hair or wool or fur covering the body of an animal
adult male swan
stocky short-legged harness horse
venomous Asiatic and African elapid snakes that can expand the skin of the neck into a hood
any spherical or nearly spherical bacteria
coccid insect
scale insects and mealybugs
parasitic on the digestive epithelium of vertebrates and higher invertebrates
a bacterial cell intermediate in morphology between a coccus and a bacillus; a very short bacillus
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
Asian breed of large fowl with dense plumage and feathered legs
Cochlearius cochlearius
tropical American heron related to night herons
adult male bird
adult male chicken
white or light-colored crested parrot of the Australian region; often kept as cage birds
a young domestic cock; not older than one year
common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs
any of numerous chiefly nocturnal insects; some are domestic pests
the fleshy red crest on the head of the domestic fowl and other gallinaceous birds
silky envelope spun by the larvae of many insects to protect pupas and by spiders to protect eggs
major food fish of Arctic and cold-temperate waters
young codfish
coelenterate family
a family of coelenterates
coelenterate genus
a genus of coelenterates
the saclike body cavity of a coelenterate
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
a bacteriophage that infects the bacterium Escherichia coli
collared lizard
any of several robust long-tailed lizards with collars of two dark bands; of central and western United States and northern Mexico
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
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
arboreal monkey of western and central Africa with long silky fur and reduced thumbs
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
mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes
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
free-swimming stalkless crinoid with ten feathery arms; found on muddy sea bottoms
ciliated comb-like swimming plate of a ctenophore
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
a locomotor organ consisting of a row of strong cilia whose bases are fused
either of two different animal or plant species living in close association but not interdependent
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
very small bipedal carnivorous dinosaur of the late Jurassic in Bavaria
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
any of various edible tropical marine gastropods of the genus Strombus having a brightly-colored spiral shell with large outer lip
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
any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes
small short-eared burrowing mammal of rocky uplands of Asia and western North America
any of various burrowing animals of the family Leporidae having long ears and short tails; some domesticated and raised for pets or food
any of various algae of the genus Tribonema; algae with branching filaments that form scum in still or stagnant fresh water
confervoid algae
algae resembling confervae especially in having branching filaments
an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus)
large dark-colored scaleless marine eel found in temperate and tropical coastal waters; some used for food
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
the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta
an organism belonging to the same species as another organism
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
contour feather
feathers covering the body of an adult bird and determining its shape
Conuropsis carolinensis
extinct parakeet whose range extended far into the United States
any dog trained to hunt raccoons
any of several breeds of hound developed for hunting raccoons
slate-black slow-flying birds somewhat resembling ducks
minute marine or freshwater crustaceans usually having six pairs of limbs on the thorax; some abundant in plankton and others parasitic on fish
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
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
a true bug
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
margin between the skin of the pastern and the horn of the hoof
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
any species of the genus Corynebacterium
Corynebacterium diphtheriae
a species of bacterium that causes diphtheria
Coryphaena equisetis
a kind of dolphinfish
Coryphaena hippurus
the more common dolphinfish valued as food; about six feet long
duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet
large white South American bird intermediate in some respects between ducks and swans
(genetics) a large vector that is made from a bacteriophage and used to clone genes or gene fragments
Cosmocampus profundus
a fish 8 inches long; found from eastern Florida to western Caribbean
Costia necatrix
a flagellate that is the cause of the frequently fatal fish disease costiasis
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
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
Old World ground-living cuckoo having a long dagger-like hind claw
Count Fleet
thoroughbred that won the triple crown in 1943
swift-footed terrestrial plover-like bird of southern Asia and Africa; related to the pratincoles
a dog trained for coursing
mature female of mammals of which the male is called `bull'
cow pony
a light saddle horse trained for herding cattle
female of domestic cattle:
North American blackbird that follows cattle and lays eggs in other birds' nests
any of numerous tropical marine gastropods of the genus Cypraea having highly polished usually brightly marked shells
Coxsackie virus
enterovirus causing a disease resembling poliomyelitis but without paralysis
offspring of a coyote and a dog
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
any of several short-billed Old World rails
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
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
animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
small sunfishes of central United States rivers
a pouch in many birds and some lower animals that resembles a stomach for storage and preliminary maceration of food
small freshwater decapod crustacean that resembles a lobster
large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters
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
an animal that creeps or crawls (such as worms or spiders or insects)
a showy growth of e.g. feathers or skin on the head of a bird or other animal
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
leaping insect; male makes chirping noises by rubbing the forewings together
cricket frog
either of two frogs with a clicking call
primitive echinoderms having five or more feathery arms radiating from a central disk
a regional term for `creature' (especially for domestic animals)
extinct human of Upper Paleolithic in Europe
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
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
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
(genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species
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
the part of an animal that corresponds to the human buttocks
black birds having a raucous call
crow blackbird
long-tailed American blackbird having iridescent black plumage
an emaciated horse likely soon to become carrion and so attractive to crows
crucifix fish
sea catfish of the Caribbean area
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
common in fresh and salt water appearing along the shore as algal blooms
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
comb-like respiratory structure serving as the gill of certain mollusks
Ctenocephalides canis
flea that attacks dogs and cats
Ctenocephalides felis
flea that breeds chiefly on cats and dogs and rats
ctenophore family
a family of ctenophores
ctenophore genus
a genus of ctenophores
the young of certain carnivorous mammals such as the bear or wolf or lion
any of numerous European and North American birds having pointed wings and a long tail
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
a sucker on the feet of certain flies
an inferior dog or one of mixed breed
large crested arboreal game bird of warm parts of the Americas having long legs and tails; highly esteemed as game and food
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
woolly-haired monkey-like arboreal marsupial of New Guinea and northern Australia
elongate compressed somewhat eel-shaped fishes
the outer body wall of an insect
long-bodied marine fishes having a long whiplike scaleless body and sharp teeth; closely related to snake mackerel
ten-armed oval-bodied cephalopod with narrow fins as long as the body and a large calcareous internal shell
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
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
primitive aquatic vertebrate
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
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
soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales
cypriniform fish
a soft-finned fish of the order Cypriniformes
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
mouth of a protozoan
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
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
small brilliantly colored tropical marine fishes of coral reefs
slender non-stinging insect similar to but smaller than the dragonfly but having wings folded when at rest
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
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.
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
any of several more or less arboreal marsupials somewhat resembling martens
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
slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days
cephalopods having eight short tentacles plus two long ones
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
definitive host
the host in which the sexual reproduction of a parasite takes place
an insect that strips the leaves from plants
lightly built medium-sized theropod with long limbs and neck
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
a plant or animal naturalized in a region
small pointed ridge on the exoskeleton of an arthropod
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
freshwater green algae
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
extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned
bottom-living cephalopod having a soft oval body with eight long tentacles
red dual-purpose cattle of English origin
Dialeurodes citri
whitefly that attacks citrus trees
Diapheromera femorata
a variety of stick insect
reptile having a pair of openings in the skull behind each eye
microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica
cephalopods having two gills
salamanders found near cold streams throughout the year
Diceros bicornis
African rhino; in danger of extinction
small bird; adults talking to children sometimes use these words to refer to small birds
dictyopterous insect
cockroaches and mantids
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
a protozoan with an ovoid shell of cemented sand grains
digger wasp
solitary wasp that digs nests in the soil and stocks them with paralyzed insects for the larvae
an animal that walks so that only the toes touch the ground as e.g. dogs and cats and horses
a hybrid produced by parents that differ only at two gene loci that have two alleles each
any of several small antelopes of eastern Africa of the genus Madoqua; the size of a large rabbit
carnivorous dinosaur of the Permian in North America having a crest or dorsal sail
a variety of dinocerate
an extinct ungulate
chiefly marine protozoa having two flagella; a chief constituent of plankton
Dinornis giganteus
the largest moa; about 12 feet high
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
Gram-positive bacteria usually occurring in pairs
Diplococcus pneumoniae
bacterium causing pneumonia in mice and humans
a huge quadrupedal herbivore with long neck and tail; of late Jurassic in western North America
(genetics) an organism or cell having the normal amount of DNA per cell; i.e., two sets of chromosomes or twice the haploid number
Dipodomys phillipsii
any of various leaping rodents of desert regions of North America and Mexico; largest members of the family Heteromyidae
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
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
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
division Archaebacteria
in some classifications considered a kingdom
division Chlorophyta
large division of chiefly freshwater eukaryotic algae that possess chlorophyll a and b, store food as starch, and cellulose cell walls; classes Chlorophyceae, Ulvophyceae, and Charophyceae; obviously ancestral to land plants
division Chrysophyta
mostly freshwater eukaryotic algae having the chlorophyll masked by brown or yellow pigment; yellow-green and golden-brown algae and diatoms: Xanthophyceae, Chrysophyceae, Bacillariophyceae; some classification systems superseded or subsumed by Heterokontophyta
division Cyanophyta
prokaryotic organisms sometimes considered a class or phylum or subkingdom; coextensive with the Cyanophyceae: cyanobacteria (blue-green algae)
division Cynodontia
a division of the order Therapsida from the Triassic period comprising small carnivorous tetrapod reptiles often with mammal-like teeth
division Dicynodontia
a division of Therapsida
division Eubacteria
one-celled monerans having simple cells with rigid walls and (in motile types) flagella
division Euglenophyta
free-swimming flagellate algae
division Heterokontophyta
algae having chlorophyll a and usually c, and flagella of unequal lengths; terminology supersedes Chrysophyta in some classifications
division Phaeophyta
coextensive with class Phaeophyceae; in some classifications subsumed in the division Heterokontophyta
division Protista
eukaryotic one-celled living organisms distinct from multicellular plants and animals: protozoa, slime molds, and eukaryotic algae
division Rhodophyta
lower plants; mostly marine and littoral eukaryotic algae
division Schizophyta
former term for the Cyanophyta
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
large brown aquatic larva of the dobsonfly; used as fishing bait
the solid bony part of the tail of an animal as distinguished from the hair
mature female of mammals of which the male is called `buck'
dog-day cicada
its distinctive song is heard during July and August
any of several small sharks
motherless calf in a range herd of cattle
Dolichonyx oryzivorus
migratory American songbird
Dolichotis patagonum
hare-like rodent of the pampas of Argentina
free-swimming oceanic tunicate with a barrel-shaped transparent body
any of various small toothed whales with a beaklike snout; larger than porpoises
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
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
Old World dung beetle that flies with a droning sound
an English breed of large domestic fowl having five toes (the hind toe doubled)
small furry-tailed squirrel-like Old World rodent that becomes torpid in cold weather
dorsal fin
unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance
marine fishes widely distributed in mid-waters and deep slope waters
any of numerous small pigeons
shorebird of the sandpiper family that resembles a snipe
soft fine feathers
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
any of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the body
small often brightly colored scaleless marine bottom-dwellers; found in tropical and warm temperate waters of Europe and America
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
small (6 inches) tropical butterfishes found worldwide
larger butterfishes of the western Atlantic from the New York area to the northern Gulf of Mexico
a kind of maniraptor
Dromaius novaehollandiae
large Australian flightless bird similar to the ostrich but smaller
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
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
considered a possible ancestor to both anthropoid apes and humans
Dryopithecus Rudapithecus hungaricus
fossil hominoids from northern central Hungary; late Miocene
small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs
duck down
down of the duck
duck-billed dinosaur
any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
young duck
an udder or breast or teat
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
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
in former classifications considered a suborder of Rodentia coextensive with the order Lagomorpha: gnawing animals
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
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
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
Ebola virus
a filovirus that causes Ebola hemorrhagic fever; carried by animals; can be used as a bioweapon
Echeneis naucrates
remoras found attached to sharks
Echidnophaga gallinacea
parasitic on especially the heads of chickens
tapeworms whose larvae are parasitic in humans and domestic animals
marine invertebrates with tube feet and five-part radially symmetrical bodies
echinoderm family
a family of echinoderms
echinoderm genus
a genus of echinoderms
Echinus esculentus
a sea urchin that can be eaten
any of a group of viruses associated with various diseases including viral meningitis and mild respiratory disorders and diarrhea in newborn infants
the outer germ layer that develops into skin and nervous tissue
any external parasitic organism (as fleas)
Ectopistes migratorius
gregarious North American migratory pigeon now extinct
sessile mossy aquatic animal having the anus of the polyp outside the crown of tentacles
an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals
heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic
primitive terrestrial mammal with few if any teeth; of tropical Central America and South America
heavily armored and highly spiked dinosaur with semi-upright posture
duck-billed dinosaur from Canada found as a fossilized mummy with skin
voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins
eellike fishes found in subarctic coastal waters
marine eellike mostly bottom-dwelling fishes of northern seas
any of various small free-living plant-parasitic roundworms
a newt in its terrestrial stage of development
animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds
egg-laying mammal
the most primitive mammals comprising the only extant members of the subclass Prototheria
moth having nonfunctional mouthparts as adults; larvae feed on tree foliage and spin egg-shaped cocoons
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
duck of the northern hemisphere much valued for the fine soft down of the females
down of the eider duck
Eira barbara
long-tailed arboreal mustelid of Central America and South America
Elagatis bipinnulata
streamlined cigar-shaped jack; good game fish
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
any of numerous venomous fanged snakes of warmer parts of both hemispheres
any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks; rays; skates
any of various widely distributed beetles
the joint of a mammal or bird that corresponds to the human elbow
Electrophorus electric
eel-shaped freshwater fish of South America having electric organs in its body
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
young eel
either of the horny front wings in beetles and some other insects which cover and protect the functional hind wings
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
embryonic tissue
tissue in an embryo
large richly colored butterfly
the mane of a horse
any ameba of the genus Endamoeba
Endamoeba histolytica
the parasitic ameba that causes amebic dysentery in human beings
the inner germ layer that develops into the lining of the digestive and respiratory systems
any of various parasites that live in the internal organs of animals (especially intestinal worms)
endospore-forming bacteria
a group of true bacteria
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
enteric bacteria
rod-shaped Gram-negative bacteria; most occur normally or pathogenically in intestines of humans and other animals
Enterobius vermicularis
small threadlike worm infesting human intestines and rectum especially in children
any of a group of picornaviruses that infect the gastrointestinal tract and can spread to other areas (especially the nervous system)
uncastrated adult male horse
the smallest of the Sennenhunde
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
a theropod dinosaur of the genus Eoraptor
anything short-lived, as an insect that lives only for a day in its winged form
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
Epstein-Barr virus
the herpes virus that causes infectious mononucleosis; associated with specific cancers in Africa and China
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
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
rod-shaped motile bacteria that attack plants
Erythrocebus patas
reddish long-tailed monkey of west Africa
edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions
a genus of enteric bacteria
Escherichia coli
a species of bacterium normally present in intestinal tract of humans and other animals; sometimes pathogenic; can be a threat to food safety
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
a large group of bacteria having rigid cell walls; motile types have flagella
an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells
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
minute single-celled green freshwater organism having a single flagella; often classed as algae
marine and freshwater green or colorless flagellate organism
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
large extinct scorpion-like arthropod considered related to horseshoe crabs
Eutamius sibiricus
terrestrial Siberian squirrel
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
female sheep
horned sheep of Devon; valued for mutton
stocky breed of pony with a fawn-colored nose
external gill
occurs in some mollusks and in tadpoles and other immature amphibians
an unfledged or nestling hawk
(embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina
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
diurnal birds of prey having long pointed powerful wings adapted for swift flight
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 Acanthisittidae
alternative names for the family comprising the New Zealand wrens
family Acanthuridae
family Acaridae
family Accipitridae
hawks; Old World vultures; kites; harriers; eagles
family Acipenseridae
family Actinomycetaceae
filamentous anaerobic bacteria
family Adelgidae
plant lice
family Aegypiidae
in some classifications considered the family comprising the Old World vultures which are more often included in the family Accipitridae
family Aepyornidae
coextensive with the order Aepyorniformes
family Agamidae
an Old World reptile family of Sauria
family Agonidae
family Ailuropodidae
in some classifications considered the family comprising the giant pandas
family Akeridae
bubble shells
family Alaudidae
family Albulidae
family Alcedinidae
family Alcidae
web-footed diving seabirds of northern seas: auks; puffins; guillemots; murres; etc.
family Aleyrodidae
family Alligatoridae
alligators; caimans
family Alopiidae
thresher sharks
family Ambystomatidae
New World salamanders
family Ameiuridae
North American catfishes
family Amiidae
only the bowfins
family Ammodytidae
sand lances
family Amphisbaenidae
worm lizards
family Amphiumidae
congo snakes
family Anabantidae
small freshwater spiny-finned fishes of Africa and southern Asia
family Anarhichadidae
family Anatidae
swimming birds having heavy short-legged bodies and bills with a horny tip: swans; geese; ducks
family Ancylidae
freshwater gastropod
family Ancylostomatidae
family Andrenidae
a large family of solitary short-tongued bees most of which burrow in the ground
family Anguidae
alligator lizards
family Anguillidae
eels that live in fresh water as adults but return to the sea to spawn
family Anhimidae
family Anhingidae
family Anniellidae
legless lizards
family Anobiidae
deathwatch beetles
family Anomalopidae
a family of fish including: flashlight fishes
family Anomiidae
saddle oysters
family Antedonidae
feather stars
family Antennariidae
frogfishes; tropical spiny-finned marine fishes having large nearly vertical mouths; related to toadfishes and anglers
family Antilocapridae
comprising only the pronghorns
family Aphididae
small soft-bodied plant lice
family Apidae
honeybees; carpenter bees; bumblebees
family Aplodontiidae
mountain beavers
family Aplysiidae
sea hares
family Apodidae
swifts; in former classifications included in the order Coraciiformes
family Apogonidae
bright-colored marine fishes that incubate eggs in the mouth
family Apterygidae
coextensive with the order Apterygiformes
family Arcellidae
soil and freshwater protozoa; cosmopolitan in distribution
family Arcidae
ark shells
family Arctiidae
tiger moths
family Ardeidae
herons; egrets; night herons; bitterns
family Argasidae
soft ticks
family Argentinidae
small marine soft-finned fishes with long silvery bodies; related to salmons and trouts
family Argiopidae
spiders that spin orb webs; cosmopolitan in distribution
family Argonautidae
represented solely by the genus Argonauta
family Ariidae
sea catfishes
family Armadillidiidae
pill bugs
family Artamidae
wood swallows
family Ascaphidae
family of one species of frog: tailed frog
family Ascaridae
large roundworms parasitic in intestines of vertebrates
family Asilidae
robber flies
family Astacidae
family Atherinidae
small spiny-finned fishes of both salt and fresh water
family Athiorhodaceae
small motile sulphur bacteria
family Atrichornithidae
family Atropidae
family Aulostomidae
family Babesiidae
piroplasms and cattle pathogens
family Bacillaceae
typically rod-shaped usually Gram-positive bacteria that produce endospores
family Bacteroidaceae
family of bacteria living usually in the alimentary canal or on mucous surfaces of warm-blooded animals; sometimes associated with acute infective processes
family Balaenicipitidae
family Balaenidae
right whales
family Balaenopteridae
rorquals; blue whales
family Balanidae
stalkless barnacles
family Balistidae
family Bangiaceae
a family of protoctist
family Bathyergidae
mole rats; sand rats
family Batrachoididae
toadfishes; related to anglers and batfishes
family Belemnitidae
family of extinct Mesozoic cephalopods
family Belonidae
ferocious fishes of warm regions resembling but unrelated to the freshwater gars
family Belostomatidae
water bugs
family Bittacidae
a family of predacious tropical insects of the order Mecoptera
family Blattidae
domestic cockroaches
family Blenniidae
a family of fish including: combtooth blennies
family Boidae
boas and pythons
family Bombycidae
Chinese silkworm moth
family Bombycillidae
a family of birds of the suborder Oscines
family Bombyliidae
bee flies
family Bothidae
a family of fish of the order Heterosomata
family Bovidae
true antelopes; cattle; oxen; sheep; goats
family Bradypodidae
a family of edentates comprising the true sloths
family Bramidae
deep-bodied percoid fishes of the open seas
family Branchiobdellidae
small annelid worms with the posterior end modified into an adhesive sucker; especially formerly regarded as modified leeches
family Branchiostegidae
small family of marine fishes having covered gills
family Branchiostomidae
family Brevicipitidae
narrow-mouthed toads and sheep frogs; some burrow and some are arboreal; found worldwide
family Brotulidae
chiefly deep-sea fishes related to the Ophidiidae
family Bruchidae
seed beetles
family Buccinidae
family Bucconidae
family Bucerotidae
family Bufonidae
true toads
family Burhinidae
large wading birds resembling the plovers: stone curlews
family Caeciliadae
coextensive with the order Gymnophiona: legless amphibians
family Caenolestidae
small marsupials of southern South America
family Callionymidae
family Calliphoridae
family Callithricidae
family Camelidae
camels and llamas and vicunas
family Cancridae
many of the best known edible crabs
family Canidae
dogs; wolves; jackals; foxes
family Capitonidae
family Caprimulgidae
family Caproidae
family Capromyidae
family Capsidae
leaf bugs
family Carabidae
ground beetles
family Carangidae
large family of narrow-bodied marine food fishes with widely forked tails; chiefly of warm seas
family Carapidae
pearlfishes: related to the Brotulidae
family Carcharhinidae
largest family of living sharks; found worldwide especially in tropical waters; dorsal fin lacks spines: requiem sharks including tiger sharks and soupfin sharks
family Cardiidae
somewhat heart-shaped sand-burrowing bivalve mollusks
family Cariamidae
crane-like South American wading birds
family Castoridae
family Casuaridae
a family of large ostrich-like birds including cassowaries
family Cathartidae
condors; turkey buzzards; king vultures
family Catostomidae
suckers; closely related to the family Cyprinidae
family Caviidae
a family of Hystricomorpha
family Cebidae
all the New World monkeys except marmosets and tamarins
family Cecidomyidae
gall midges
family Centrarchidae
sunfish family
family Centriscidae
family Centropomidae
a family of fish or the order Perciformes including robalos
family Cephalobidae
a family of Nematoda
family Cerambycidae
long-horned beetles
family Ceratodontidae
lungfishes having hornlike ridges on the teeth
family Ceratopogonidae
biting midges; sand flies
family Ceratopsidae
American ceratopsian dinosaurs
family Cercopidae
froghoppers or spittlebugs
family Cercopithecidae
Old World monkeys: guenon; baboon; colobus monkey; langur; macaque; mandrill; mangabey; patas; proboscis monkey
family Certhiidae
family Cervidae
deer: reindeer; moose or elks; muntjacs; roe deer
family Cestidae
coextensive with the order Cestida; ctenophores having a greatly flattened and elongated body
family Cetorhinidae
in some older classifications considered the family of the basking sharks
family Chaetodontidae
butterfly fishes
family Chalcididae
an arthropod family including: chalcidflies
family Chamaeleontidae
Old World chameleons; in some classifications they are considered a superfamily of Sauria
family Characeae
green algae superficially resembling horsetail ferns: stoneworts
family Characidae
tropical freshwater fishes of Africa and South America and Central America
family Characinidae
former name of the Characidae
family Charadriidae
plover family
family Cheloniidae
green turtles; hawksbills
family Chelydridae
snapping turtles
family Chermidae
jumping plant lice
family Chimaeridae
a family of Holocephali
family Chinchillidae
small bushy-tailed South American burrowing rodents
family Chironomidae
family Chlamydiaceae
Gram-negative parasites in warm-blooded vertebrates
family Chlamydomonadaceae
green algae some of which are colored red by hematochrome
family Chlorophthalmidae
small family of soft-finned bottom-dwellers with large eyes; relatives of lizardfishes
family Chrysochloridae
golden moles
family Chrysomelidae
leaf beetles
family Chrysopidae
green lacewings
family Cicadellidae
family Cicadidae
family Cichlidae
family Cicindelidae
tiger beetles
family Ciconiidae
family Cimicidae
wingless flat-bodied bloodsucking insects
family Cinclidae
water ouzels
family Cleridae
beetles that prey on other insects
family Clinidae
viviparous blennies of temperate and tropical seas
family Clupeidae
herrings; shad; sardines; etc.
family Cobitidae
family Coccidae
scale insects
family Coccinellidae
the ladybugs
family Coerebidae
the honeycreepers
family Colubridae
nonvenomous snakes; about two-thirds of all living species
family Columbidae
doves and pigeons
family Comatulidae
former usage synonymous with Antedonidae
family Congridae
marine eels
family Coraciidae
family Cordylidae
small family of spiny ovoviviparous African lizards
family Coregonidae
soft-finned fishes comprising the freshwater whitefishes; formerly included in the family Salmonidae
family Coreidae
squash bugs and leaf-footed bugs
family Corixidae
water bugs
family Corvidae
crow; raven; rook; jackdaw; chough; magpie; jay
family Corydalidae
family Corynebacteriaceae
a large family of mostly Gram-positive and aerobic and nonmotile rod-shaped bacteria of the order Eubacteriales
family Coryphaenidae
large active pelagic percoid fish
family Cotingidae
cotingas; umbrella birds
family Cottidae
family Cracidae
curassows; guans; chachalacas
family Cracticidae
Australian birds formerly included in the family Laniidae
family Crangonidae
family Cricetidae
mostly small New World rodents including New World mice and lemmings and voles and hamsters
family Crocodylidae
true crocodiles
family Crotalidae
New World vipers: pit vipers
family Cryptobranchidae
large aquatic salamanders: hellbenders; giant salamanders
family Cryptocercidae
a family of Blattodea
family Ctenizidae
large burrowing spiders
family Cuculidae
includes cuckoo; ani; roadrunner
family Culicidae
family Curculionidae
true weevils: snout beetles
family Cuterebridae
New World botflies
family Cyclopteridae
family Cymatiidae
family Cynipidae
a family of Hymenoptera
family Cynocephalidae
a family of Dermoptera
family Cynoglossidae
family Cypraeidae
family of marine gastropods comprising the cowries
family Cyprinidae
a family of fish including: carp; tench; roach; rudd; dace
family Cyprinodontidae
large family of small soft-finned fishes; killifishes; flagfishes; swordtails; guppies
family Dactylopiidae
cochineal insects
family Dactylopteridae
flying gurnards
family Dactyloscopidae
sand stargazers
family Danaidae
small family of usually tropical butterflies: monarch butterflies
family Dasyatidae
sting rays
family Dasypodidae
family Dasyproctidae
agoutis and pacas
family Dasyuridae
dasyures; native cats; pouched mice; banded anteaters; Tasmanian devils
family Daubentoniidae
comprising solely the aye-aye
family Delphinidae
family Dendrocolaptidae
woodhewers or woodcreepers
family Dermestidae
carpet beetles
family Dermochelyidae
sea turtles
family Desmidiaceae
unicellular algae
family Desmodontidae
true vampire bats
family Diaspididae
armored scales
family Dicamptodontidae
large and small highly aquatic salamanders
family Didelphidae
family Dinornithidae
family Diodontidae
spiny puffers
family Diomedeidae
family Dipodidae
Old World jerboas
family Discoglossidae
family of Old World toads having a fixed disklike tongue
family Doliolidae
oceanic tunicates
family Dracunculidae
greatly elongated roundworm
family Drepanididae
Hawaiian honeycreepers
family Dromaeosauridae
swift-running bipedal dinosaurs
family Drosophilidae
fruit flies
family Dugongidae
a family of mammals of order Sirenia including dugongs and Steller's sea cow
family Dytiscidae
water beetles
family Echeneididae
fishes having a sucking disk on the head for clinging to other fishes and to ships
family Edaphosauridae
a family of reptiles of the order Pelycosauria
family Eimeriidae
a family of protoctist in the order Coccidia
family Elapidae
cobras; kraits; mambas; coral snakes; Australian taipan and tiger snakes
family Elateridae
click beetles and certain fireflies
family Electrophoridae
small family comprising the electric eels
family Eleotridae
family Elephantidae
family Elopidae
tarpons and ladyfishes
family Embiotocidae
viviparous percoid fishes comprising the surf fishes
family Emydidae
box and water turtles
family Endamoebidae
a large family of endoparasitic amebas that invade the digestive tract
family Engraulidae
family Enterobacteriaceae
a large family of Gram-negative rod-shaped bacteria of the order Eubacteriales
family Ephemeridae
family Ephippidae
small family comprising the spadefishes
family Equidae
horses; asses; zebras; extinct animals
family Erethizontidae
New World arboreal porcupines
family Erinaceidae
true hedgehogs
family Eschrichtiidae
comprising only the grey whales
family Esocidae
pikes; pickerels; muskellunges
family Euglenaceae
considered green algae
family Eurylaimidae
coextensive with the suborder Eurylaimi
family Exocoetidae
flying fishes; closely related to the halfbeaks
family Falconidae
a family of birds of the order Falconiformes
family Fasciolidae
a family of Trematoda
family Felidae
cats; wildcats; lions; leopards; cheetahs; saber-toothed tigers
family Filariidae
threadlike roundworms
family Fissurellidae
marine limpets
family Fistulariidae
family Forficulidae
typical earwigs
family Formicariidae
family Formicidae
family Fregatidae
frigate birds
family Fringillidae
finches: goldfinches; bullfinches; chaffinches; siskins; canaries; cardinals; grosbeaks; crossbills; linnets; buntings
family Fucaceae
small family of brown algae: gulfweeds; rockweeds
family Fulgoridae
plant hoppers: lantern flies
family Furnariidae
e.g. ovenbirds
family Gadidae
large family of important mostly marine food fishes
family Galbulidae
family Gasterophilidae
horse botflies
family Gasterosteidae
family Gavialidae
family Gavidae
loon family
family Gekkonidae
family Gelechiidae
important economic pests
family Gempylidae
snake mackerels
family Geometridae
measuring worms
family Geomyidae
North American pocket gophers
family Geophilidae
small extremely elongate centipedes that live in earth
family Gerreidae
family Gerrididae
an arthropod family that includes water striders
family Gigartinaceae
a family of protoctist
family Giraffidae
family Glareolidae
Old World shorebirds: pratincoles and coursers
family Gliridae
dormice and other Old World forms
family Globigerinidae
a family of protoctists
family Glossinidae
flies closely related to the Muscidae: tsetse flies
family Gobiesocidae
family Gobiidae
family Gomphotheriidae
elephants extinct since the Pleistocene
family Gonorhynchidae
coextensive with the genus Gonorhynchus
family Gracilariidae
leaf miners
family Gruidae
family Gryllidae
family Gyrinidae
whirligig beetles
family Hadrosauridae
duck-billed dinosaurs; upper Cretaceous
family Haematopodidae
family Haemoproteidae
bird parasites
family Haemulidae
family Halictidae
a family of small solitary bees; many are valuable pollinators for agriculture
family Haliotidae
family Helicidae
land snails including the common edible snail and some pests
family Helodermatidae
only known venomous lizards
family Hemerobiidae
brown lacewings
family Hemiprocnidae
tree swifts
family Hemiramphidae
halfbeaks; marine and freshwater fishes closely related to the flying fishes but not able to glide
family Heteromyidae
small New World burrowing mouselike rodents with fur-lined cheek pouches and hind limbs and tail adapted to leaping; adapted to desert conditions: pocket mice; kangaroo mice; kangaroo rats
family Hexagrammidae
family Hexanchidae
primitive sharks
family Hippoboscidae
winged or wingless dipterans: louse flies
family Hippopotamidae
family Hipposideridae
Old World leafnose bats
family Hirudinidae
a family of Hirudinea
family Hirundinidae
swallows and martins
family Holocentridae
squirrelfishes and soldierfishes
family Holothuridae
a family of Holothuroidea
family Homaridae
large-clawed lobsters
family Hominidae
modern man and extinct immediate ancestors of man
family Hyaenidae
family Hydrobatidae
storm petrels
family Hydrochoeridae
family Hydrophidae
sea snakes
family Hylidae
the amphibian family of tree frogs
family Hylobatidae
used in some classifications for the lesser apes (gibbons and siamangs); sometimes considered a subfamily of Pongidae
family Hyperodontidae
beaked whales; in some especially former classifications included in the family Physeteridae
family Hypodermatidae
warble flies
family Hystricidae
Old World porcupines
family Ichneumonidae
ichneumon flies
family Ichthyosauridae
later ichthyosaurs of the Jurassic and Cretaceous; widely distributed in both hemispheres
family Icteridae
American orioles; American blackbirds; bobolinks; meadowlarks
family Iguanidae
New World lizards
family Iguanodontidae
family Indicatoridae
honey guides
family Indriidae
a family of Lemuroidea
family Irenidae
a family of birds of the suborder Oscines
family Istiophoridae
sailfishes; spearfishes; marlins
family Isuridae
in some classifications another name for the family Lamnidae
family Ixodidae
hard ticks
family Jassidae
family of small leafhoppers coextensive with the Cicadellidae and not distinguished from it in some classifications
family Kalotermitidae
primitive termites of warm regions
family Kasuwonidae
in some classifications considered a separate family comprising the oceanic bonitos
family Kinosternidae
mud turtles; musk turtles
family Kyphosidae
sea chubs
family Labridae
family Lacertidae
Old World lizards
family Lactobacteriaceae
lactic acid bacteria and important pathogens; bacteria that ferment carbohydrates chiefly into lactic acid
family Laminariaceae
large family of marine brown algae including many economically important large kelps chiefly of northern waters
family Lamnidae
oceanic sharks
family Lampridae
family Lampyridae
family Laniidae
family Lanthanotidae
stout-bodied lizards
family Laricariidae
armored catfish
family Laridae
gull family: gulls and terns
family Lasiocampidae
tent caterpillars; eggars; lappet moths
family Latimeridae
extinct except for the coelacanth
family Leiopelmatidae
primitive New Zealand frogs
family Lemuridae
typical lemurs; of Madagascar
family Lepadidae
goose barnacles
family Lepismatidae
family Lepisosteidae
comprises the genus Lepisosteus
family Leporidae
hares and rabbits
family Leptodactylidae
New World frogs; in some classifications essentially coextensive with the family Bufonidae
family Leptotyphlopidae
blind snakes
family Limacidae
family Limulidae
horseshoe crabs
family Liparididae
family Lithodidae
deep-sea crabs of cold waters
family Littorinidae
family Lobotidae
family Locustidae
short-horned grasshoppers; true locusts
family Lophiidae
large-headed marine fishes comprising the anglers
family Lorisidae
slow-moving omnivorous nocturnal primates of tropical Asia; usually tailless
family Lucanidae
stag beetles
family Lutjanidae
family Luvaridae
family Lycaenidae
family of small usually brilliantly colored butterflies; males have short forelegs
family Lycosidae
wolf spiders
family Lygaeidae
lygaeid bugs
family Lymantriidae
tussock moths
family Machilidae
jumping bristletails
family Macropodidae
kangaroos; wallabies
family Macrorhamphosidae
bellows fishes
family Macrouridae
family Majidae
spider crabs
family Malacanthidae
short-headed marine fishes; often brightly colored
family Manidae
coextensive with the order Pholidota
family Manteidae
family Mantispidae
family Mastodontidae
extinct family: mastodons
family Mastotermitidae
primitive termites
family Megachilidae
leaf-cutting and mason bees
family Megadermatidae
Old World false vampire bats
family Megalonychidae
mammal family consisting of the two-toed sloths
family Megalosauridae
family Megapodiidae
family Megatheriidae
extinct ground sloths
family Meleagrididae
turkeys and some extinct forms
family Meliphagidae
honey eaters
family Meloidae
blister beetles
family Membracidae
plant hoppers: treehoppers
family Menuridae
family Meropidae
family Micrococcaceae
spherical or elliptical usually aerobic eubacteria that produce yellow or orange or red pigment; includes toxin-producing forms as well as harmless commensals and saprophytes
family Microdesmidae
worm fish
family Mimidae
sometimes considered a subfamily of Troglodytidae: mockingbirds; catbirds; thrashers
family Mobulidae
large rays lacking venomous spines: mantas
family Molidae
ocean sunfishes
family Molossidae
mastiff bats; freetail bats
family Momotidae
a family of birds of the order Coraciiformes
family Monocanthidae
family Monodontidae
family Motacillidae
pipits and wagtails
family Mugilidae
grey mullets
family Mullidae
goatfishes or red mullets
family Muraenidae
marine eels
family Muridae
originally Old World rats now distributed worldwide; distinguished from the Cricetidae by typically lacking cheek pouches
family Muscicapidae
Old World (true) flycatchers
family Muscidae
two-winged flies especially the housefly
family Musophagidae
family Mustelidae
weasels; polecats; ferrets; minks; fishers; otters; badgers; skunks; wolverines; martens
family Mutillidae
a family of wasps
family Myacidae
soft-shell clams
family Mycetophylidae
fungus gnats
family Mycobacteriaceae
a family of bacteria
family Mycoplasmataceae
pleomorphic Gram-negative nonmotile microorganism similar to both viruses and bacteria; parasitic in mammals
family Myctophidae
deep-sea fishes comprising the lantern fishes
family Myliobatidae
eagle rays
family Mylodontidae
extinct South American edentates
family Myrmecophagidae
New World anteaters
family Myrmeleontidae
family Mysidae
small shrimp-like crustaceans
family Mytilidae
marine mussels
family Myxinidae
slime-producing marine animals: hagfishes
family Myxobacteriaceae
bacteria living mostly in soils and on dung
family Naticidae
family Nautilidae
spiral-shelled cephalopods
family Nephropsidae
in some classifications coextensive with the Homaridae
family Nepidae
water scorpions
family Neritidae
family Nitrobacteriaceae
usually rod-shaped bacteria that oxidize ammonia or nitrites: nitrobacteria
family Noctuidae
cutworms; armyworms
family Nostocaceae
blue-green algae
family Notonectidae
aquatic carnivorous insects
family Notoryctidae
pouched moles
family Nummulitidae
a family of fossil protoctists
family Nymphalidae
large beautifully colored butterflies
family Ochotonidae
pikas and extinct forms
family Octopodidae
a family of Octopoda
family Odobenidae
walruses and extinct forms
family Odontaspididae
sand sharks; in some classifications coextensive with family Carcharhinidae
family Oedogoniaceae
filamentous green algae
family Ogcocephalidae
batfishes: sluggish bottom-dwelling spiny fishes
family Oniscidae
a family of Isopoda
family Ophidiidae
eellike marine fishes
family Ophiodontidae
fishes closely related to greenlings
family Opisthocomidae
comprising the hoatzins
family Opisthognathidae
family Orchestiidae
beach fleas
family Orectolobidae
nurse sharks and carpet sharks
family Oriolidae
Old World orioles
family Ornithorhynchidae
family Orycteropodidae
family Oscillatoriaceae
blue green algae
family Osmeridae
family Osteoglossidae
a family of large fishes that live in freshwater; includes bandfish and bonytongues
family Ostraciontidae
family Ostreidae
family Otariidae
eared seals: sea lions and fur seals
family Otididae
family Oxyuridae
family Paguridae
hermit crabs
family Palaemonidae
family Palinuridae
spiny lobsters
family Pandionidae
family Panorpidae
a family of insects of the order Mecoptera
family Paradisaeidae
birds of paradise
family Paridae
titmice and chickadees
family Parulidae
New World warblers
family Passeridae
true sparrows: Old world birds formerly considered weaverbirds
family Patellidae
marine limpets
family Pectinidae
family Pediculidae
true lice: human lice and related forms
family Pelecanidae
family Pelecanoididae
diving petrels
family Pelobatidae
the amphibian family of spadefoot toads
family Pempheridae
family Peneidae
tropical prawns
family Pennatulidae
sea pens
family Peramelidae
family Percidae
active freshwater fishes; true perches and pike perches
family Percophidae
percoid flatheads
family Peridiniidae
marine and freshwater dinoflagellates
family Peripatidae
a family of Onychophora
family Peripatopsidae
a family of Onychophora
family Petromyzontidae
family Phaethontidae
family Phalacrocoracidae
family Phalangeridae
phalangers; koalas
family Phalangiidae
a family of Phalangida
family Phalaropidae
family Phasianidae
pheasants; quails; partridges
family Phasmatidae
stick insects
family Phocidae
earless seals
family Phoenicopteridae
family Phoeniculidae
wood hoopoes
family Pholadidae
a family of Bivalvia
family Pholididae
a family of fish of suborder Blennioidea
family Phthiriidae
crab lice
family Phyllidae
leaf insects
family Phyllostomatidae
New World leaf-nosed bats
family Phylloxeridae
plant lice
family Physeteridae
sperm whales
family Physidae
freshwater snails
family Picidae
family Pieridae
arthropod family including cabbage butterflies; sulphur butterflies
family Pinnotheridae
tiny soft-bodied crabs
family Pipidae
tongueless frogs
family Pipridae
family Pittidae
family Plasmodiidae
malaria parasites
family Plataleidae
family Platanistidae
river dolphins
family Platycephalidae
scorpaenoid flatheads
family Plethodontidae
small mostly terrestrial New World salamanders having neither lungs nor gills as adults
family Pleurobrachiidae
sea gooseberries
family Pleuronectidae
righteye flounders
family Ploceidae
family Podargidae
family Podicipedidae
coextensive with the order Podicipitiformes
family Poeciliidae
family Polynemidae
family Polyodontidae
family Polypedatidae
Old World tree frogs
family Pomacentridae
family Pomatomidae
food and game fishes related to pompanos
family Pongidae
usually considered as comprising orangutans; gorillas; chimpanzees; and sometimes gibbons
family Porcellionidae
sow bugs
family Portunidae
swimming crabs
family Potamogalidae
otter shrews
family Priacanthidae
small carnivorous percoid fishes found worldwide in tropical seas
family Pristidae
large primitive rays with elongated snouts
family Procaviidae
includes all recent members of the order Hyracoidea
family Procellariidae
petrels; fulmars; shearwaters
family Procyonidae
raccoons; coatis; cacomistles; kinkajous; and sometimes pandas
family Proteidae
mud puppies
family Prunellidae
hedge sparrow
family Pseudococcidae
scalelike insects: mealybugs
family Pseudomonodaceae
rod-shaped Gram-negative bacteria; include important plant and animal pathogens
family Psittacidae
coextensive with the order Psittaciformes
family Psocidae
a family of small soft-bodied insects that feed on decaying vegetation; related to booklice
family Psophiidae
family Psychodidae
very small two-winged flies with hairy wings that develop in moss and damp vegetable matter: sand flies
family Pteriidae
pearl oysters
family Pteroclididae
family Pterodactylidae
a reptile family in the order Pterosauria
family Ptilonorhynchidae
family Pulicidae
many common fleas attacking humans and domestic animals
family Pygopodidae
Australian and Tasmanian lizards
family Pyralididae
bee moths; corn borers; flour moths
family Pyrrhocoridae
family Pythonidae
in some classifications a family separate from Boidae comprising Old World boas
family Rachycentridae
family of pelagic fishes containing solely the cobia
family Rajidae
bottom-dwelling tropical rays: skates
family Rallidae
rails; crakes; gallinules; coots
family Ramphastidae
family Ranidae
a family nearly cosmopolitan in distribution: true frogs
family Raphidae
extinct dodos and solitaires
family Raphidiidae
a family of arthropods of the suborder Megaloptera, including snakeflies
family Recurvirostridae
long-legged shorebirds
family Reduviidae
assassin bugs
family Regalecidae
family Rheidae
a family of birds coextensive with the order Rheiformes
family Rhincodontidae
small-toothed sharks comprising only one species
family Rhinobatidae
primitive rays with guitar-shaped bodies
family Rhinocerotidae
family Rhinolophidae
Old World leaf-nosed bats
family Rhinotermitidae
large widely distributed family of termites of temperate to tropical regions
family Rhizobiaceae
a small family of rod-shaped bacteria
family Rhodymeniaceae
a family of protoctist
family Rickettsiaceae
microorganism resembling bacteria inhabiting arthropod tissues but capable of causing disease in vertebrates
family Rynchopidae
coextensive with the genus Rynchops: skimmers
family Sagittariidae
secretary birds
family Salamandridae
family Salmonidae
salmon and trout
family Salpidae
a small family of tunicates in the class Thaliacea
family Sarcoptidae
small whitish mites
family Saturniidae
important and widely distributed family of moths including some of the largest insects known
family Satyridae
a widely distributed family of butterflies common near the edges of woods
family Scarabaeidae
scarab or dung beetles
family Scaridae
family Schistosomatidae
a family of Trematoda
family Schizophyceae
former terms for Cyanophyceae
family Sciaenidae
warm-water marine fishes including the drums and grunts and croakers and sea trout
family Sciaridae
fungus gnats
family Scincidae
family Sciuridae
a mammal family of true squirrels including: ground squirrels; marmots; chipmunks; flying squirrels; spermophiles
family Scolopacidae
sandpiper family: sandpipers; woodcocks; snipes; tattlers; curlews; godwits; dowitchers
family Scolytidae
large family of bark-boring or wood-boring short-beaked beetles; very destructive to forest and fruit trees
family Scomberesocidae
only sauries
family Scombridae
marine food fishes: mackerels; chub mackerels; tuna
family Scorpaenidae
scorpionfishes; rockfishes; lionfishes
family Scutigeridae
a family of Chilopoda
family Scyliorhinidae
small bottom-dwelling sharks
family Sepiidae
true cuttlefishes
family Serranidae
marine fishes: sea basses; sea perches; groupers; jewfish
family Sialidae
an arthropod family including: alderflies
family Sillaginidae
small family of small food fishes in shallow waters of the Pacific around Indonesia
family Siluridae
Old World catfishes
family Simuliidae
blackflies and sand flies
family Sirenidae
family Sisyridae
an arthropod family of the order Neuroptera that includes spongeflies
family Sittidae
family Soleidae
family Solenidae
razor clams
family Soricidae
family Spalacidae
mole rats
family Sparidae
porgies; scups
family Sphecidae
mud daubers; some digger wasps
family Spheniscidae
comprising all existing penguins
family Sphingidae
family Sphyraenidae
monotypic family of large active fishes of tropical and subtropical waters: barracuda
family Sphyrnidae
hammerhead sharks; bonnethead sharks
family Spirillaceae
rigid spirally curved elongate bacteria
family Spirochaetaceae
large coarsely spiral bacteria; free-living in fresh or salt water or commensal in bodies of oysters
family Spirulidae
coextensive with the genus Spirula; included in the order Belemnoidea in some older classifications
family Squalidae
dogfishes having a spine in each dorsal fin
family Squatinidae
bottom-dwelling ray-like sharks
family Squillidae
crustaceans that burrow in mud or under stones in shallow water along the seashore
family Staphylinidae
rove beetles
family Steatornithidae
family Stenopelmatidae
long-horned grasshoppers
family Stercorariidae
jaegers and skuas:
family Stichaeidae
family Stizidae
cicada killers
family Streptomycetaceae
higher bacteria typically aerobic soil saprophytes
family Strigidae
a family of nocturnal birds of the order Strigiformes
family Stromateidae
butterfishes: harvest fishes; dollar fishes
family Strombidae
the family of conchs
family Struthionidae
tall terrestrial birds: ostriches
family Sturnidae
Old World starlings
family Suidae
pigs; hogs; boars
family Sulidae
gannets and boobies
family Sylviidae
in some classifications considered a subfamily (Sylviinae) of the family Muscicapidae: Old World (true) warblers; American kinglets and gnatcatchers
family Syngnathidae
family Synodontidae
soft-finned bottom-dwelling fishes
family Tabanidae
family Tachinidae
parasites on other insects
family Tachyglossidae
family Taeniidae
a family of Cestoda
family Talpidae
family Tapiridae
tapirs and extinct related forms
family Tarsiidae
coextensive with the genus Tarsius: tarsiers
family Tayassuidae
family Teiidae
whiptails; etc.
family Tenebrionidae
a family of arthropods including darkling beetles and mealworms
family Tenrecidae
tenrecs and extinct related forms
family Tenthredinidae
family Terebellidae
marine burrowing or tube-forming polychete worms usually having long thick bodies
family Teredinidae
family Termitidae
family Testudinidae
land tortoises
family Tetranychidae
plant-feeding mites
family Tetraodontidae
family Tetraonidae
family Tettigoniidae
long-horned grasshoppers; katydids
family Theraphosidae
large tropical spiders; tarantulas
family Theridiidae
a family of comb-footed spiders
family Thiobacteriaceae
free-living coccoid to rod-shaped bacteria that derive energy from oxidizing sulfur or sulfur compounds
family Thraupidae
family Threskiornithidae
family Thripidae
family Timaliidae
family Tinamidae
comprising the tinamous
family Tineidae
clothes moths
family Tingidae
lace bugs
family Tipulidae
crane flies
family Titanosauridae
herbivorous dinosaurs of the Cretaceous
family Todidae
a family of birds of the order Coraciiformes
family Torpedinidae
electric rays
family Tortricidae
leaf rollers and codling moths
family Toxotidae
family Trachipteridae
family Tragulidae
family Trephritidae
fruit flies; some leaf miners
family Treponemataceae
small spirochetes some parasitic or pathogenic
family Triakidae
small sharks with smooth skins and lacking spines on their dorsal fins
family Tribonemaceae
simple filamentous freshwater yellow-green algae
family Trichechidae
comprising only the manatees
family Trichiuridae
family Trichodontidae
two species of elongate compressed scaleless large-eyed fishes that live in sand or mud
family Tridacnidae
large marine hard-shell clams
family Triglidae
in some classifications restricted to the gurnards and subdivided into the subfamilies Triglinae (true sea robins) and Peristediinae (armored sea robins)
family Trionychidae
soft-shelled turtles
family Triopidae
a family of Notostraca
family Trochilidae
family Troglodytidae
family Trogonidae
coextensive with the order Trogoniformes
family Trombiculidae
family Trombidiidae
family Tupaiidae
tree shrews; in some classifications tree shrews are considered prosimian primates
family Turdidae
thrushes; in some classifications considered a subfamily (Turdinae) of the family Muscicapidae
family Turnicidae
small Old World birds resembling but not related to true quail
family Tylenchidae
a family of Nematoda
family Typhlopidae
blind snakes
family Tytonidae
comprising only the barn owls
family Uintatheriidae
an extinct family of Dinocerata
family Ulvaceae
thin flat or tubular green algae
family Unionidae
freshwater mussels found worldwide
family Upupidae
family Uranoscopidae
family Ursidae
bears and extinct related forms
family Varanidae
monitor lizards
family Veneridae
hard-shell clams
family Vespertilionidae
the majority of common bats of temperate regions of the world
family Vespidae
an arthropod family of the order Hymenoptera including: yellow jackets; hornets; mason wasps
family Viperidae
Old World vipers
family Vireonidae
small insectivorous American songbirds
family Viverrinae
genets; civets; mongooses
family Volvocaceae
unicellular or colonial biflagellate free-swimming flagellates
family Vombatidae
family Xantusiidae
night lizards
family Xenopodidae
in some classifications the family of the genus Xenopus which is otherwise included in the family Pipidae
family Xenosauridae
monotypic family of Mexican lizards
family Xiphiidae
comprising the common swordfishes
family Zapodidae
jumping mice
family Zeidae
a family of fish in the order Zeomorphi
family Zoarcidae
family Zygnemataceae
pond scums: common freshwater algae forming green slimy masses
hollow or grooved tooth of a venomous snake; used to inject its poison
canine tooth of a carnivorous animal; used to seize and tear its prey
an appendage of insects that is capable of injecting venom; usually evolved from the legs
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
a young deer
the light horny waterproof structure forming the external covering of birds
an animal being fattened or suitable for fattening
an animal that feeds on a particular source of food
a nervous belligerent little mongrel dog
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
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
domesticated albino variety of the European polecat bred for hunting rats and rabbits
ferret badger
small ferret-like badger of southeast Asia
projection behind and above a horse's hoof
the joint between the cannon bone and the pastern
fetter bone
the part between the fetlock and the hoof
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
greenish-yellow Australian oriole feeding chiefly on figs and other fruits
fighting cock
a cock bred and trained for fighting
slender threadlike roundworms living in the blood and tissues of vertebrates; transmitted as larvae by biting insects
narrow flattened warm-water fishes with leathery skin and a long file-like dorsal spine
a young female horse under the age of four
a family of threadlike RNA viruses that cause diseases in humans and nonhuman primates (monkeys and chimpanzees)
animal viruses belonging to the family Filoviridae
organ of locomotion and balance in fishes and some other aquatic animals
any of numerous small songbirds with short stout bills adapted for crushing seeds
a young or small fish
an animal that wins in a contest of speed
fire ant
omnivorous ant of tropical and subtropical America that can inflict a painful sting
a true bug: brightly colored bug that can exude a stain
nocturnal beetle common in warm regions having luminescent abdominal organs
first stomach
the first compartment of the stomach of a ruminant; here food is collected and returned to the mouth as cud for chewing
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 family
any of various families of fish
fish fly
similar to but smaller than the dobsonfly; larvae are used as fishing bait
fish genus
any of various genus of fish
fish louse
a kind of copepod
fish scale
scale of the kind that covers the bodies of fish
a bone of a fish
terrestrial carnivores; having toes separated to the base: dogs; cats; bears; badgers; raccoons
in some classifications considered a suborder of Carnivora
Fissurella apertura
marine limpet having a conical shell with an opening at the apex
a conspicuously marked or shaped tail
a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals
flagellated cell
any cell or one-celled organism equipped with a flagellum
a lash-like appendage used for locomotion (e.g., in sperm cells and some bacteria and protozoa)
flame cell
organ of excretion in flatworms
large pink to scarlet web-footed wading bird with down-bent bill; inhabits brackish lakes
the side between ribs and hipbone
flat-coated retriever
an English breed having a shiny black or liver-colored coat; retrieves game from land or water
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
food fish of the Indonesian region of the Pacific; resembles gurnards
pallid bottom-dwelling flat-headed fish with large eyes and a duck-like snout
parasitic or free-living worms having a flattened body
a family of arboviruses carried by arthropods
animal viruses belonging to the family Flaviviridae
any wingless bloodsucking parasitic insect noted for ability to leap
flea beetle
any small leaf beetle having enlarged hind legs and capable of jumping
young bird that has just fledged or become capable of flying
outer coat of especially sheep and yaks
North American woodpecker
flight feather
any of the larger wing or tail feathers of a bird
flightless bird
flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
the flat broad limb of aquatic animals specialized for swimming
Florida smoothhound
found from the northern Gulf of Mexico to Brazil
Florida water rat
of Florida wetlands
any of various European and non-European marine flatfish
flour beetle
an insect that infests flour and stored grains
either of the two lobes of the tail of a cetacean
parasitic flatworms having external suckers for attaching to a host
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
a young horse
food fish
any fish used for food by human beings
any of various organs of locomotion or attachment in invertebrates
marine microorganism having a calcareous shell with openings where pseudopods protrude
fore wing
either of the anterior pair of wings on an insect that has four wings
a front foot of a quadruped
the forelimb of a quadruped
the front limb (or the homologous structure in other animals, such as a flipper or wing)
a lock of a horse's mane that grows forward between the ears
front paw; analogous to the human hand
form genus
an artificial taxonomic category established on the basis of morphological resemblance for organisms of obscure true relationships especially fossil forms
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 foot
foot adapted for digging as in moles
fossorial mammal
a burrowing mammal having limbs adapted for digging
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
medium-sized glossy-coated hounds developed for hunting foxes
Francisella tularensis
the type species of the genus Francisella and the causal agent of tularemia in humans; can be used as a bioweapon
Frankliniella fusca
injurious to growing tobacco and peanuts
Fratercula arctica
common puffin of the northern Atlantic
Fratercula corniculata
northern Pacific puffin
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
butterfly with brownish wings marked with black and silver
fish having a frog-like mouth with a lure on the snout
a variety of spittlebug
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
a fossilized cast or impression of algae of the order Fucales
any of various algae of the family Fucaceae
any member of the genus Fucus
Fucus serratus
brown algae seaweed with serrated edges
Fucus vesiculosus
a common rockweed used in preparing kelp and as manure
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
dense coat of fine silky hairs on mammals (e.g., cat or seal or weasel)
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
a forked bone formed by the fusion of the clavicles of most birds
any of various large flies that annoy livestock
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
any of various insects that deposit their eggs in plants causing galls in which the larvae feed
small Asiatic wild bird; believed to be ancestral to domestic fowl
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
any of various small aquatic birds of the genus Gallinula distinguished from rails by a frontal shield and a resemblance to domestic hens
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
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
mature male goose
large heavily built seabird with a long stout bill noted for its plunging dives for fish
primitive fishes having thick bony scales with a shiny covering
shiny substance that resemble enamel and is secreted by the corium of certain fishes (especially ganoid fishes) and composes the outer layer of their scales
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
lower part of a horse's thigh between the hock and the stifle
Gasterophilus intestinalis
parasitic chiefly on horses
type genus of the family Gasterosteidae
Gasterosteus aculeatus
of rivers and coastal regions
Gasterosteus pungitius
confined to rivers
gastric mill
thick-walled muscular pouch below the crop in many birds and reptiles for grinding food
Gastrophryne carolinensis
small toad of southeastern United States
Gastrophryne olivacea
small secretive toad with smooth tough skin of central and western North America
a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes
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
small swift graceful antelope of Africa and Asia having lustrous eyes
any of various small chiefly tropical and usually nocturnal insectivorous terrestrial lizards typically with immovable eyelids; completely harmless
a word for horse used by children or in adult slang
castrated male horse
Gelechia gossypiella
small brown moth whose larvae bore into flowers and bolls of cotton
Gelechia gossypiella
larvae of a gelechiid moth introduced from Asia; feeds on the seeds of cotton bolls
small slender-winged moths whose larvae are agricultural pests
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 Abramis
European fishes
genus Abrocoma
genus Abudefduf
damsel fishes
genus Acanthisitta
a genus of Xenicidae
genus Acanthocybium
genus Acanthophis
Australian elapid snakes
genus Acanthoscelides
a genus of Bruchidae
genus Acanthurus
type genus of the Acanthuridae: doctorfishes
genus Acarus
any of several mites of the order Acarina
genus Accipiter
type genus of the family Accipitridae
genus Acherontia
death's-head moth
genus Acheta
common house and field crickets
genus Achoerodus
a genus of Labridae
genus Acinonyx
genus Acipenser
type genus of the Acipenseridae: sturgeons
genus Acridotheres
genus Acris
cricket frogs
genus Acrobates
a genus of Phalangeridae
genus Acrocephalus
a genus of Sylviidae
genus Acropora
coelenterate genus of order Madreporaria, including staghorn corals
genus Actias
luna moths
genus Actinia
a genus of sea anemone common in rock pools
genus Actinomyces
type genus of the family Actinomycetaceae
genus Actitis
a genus of Scolopacidae
genus Adalia
genus of ladybugs
genus Addax
genus of antelopes of northern African deserts
genus Adelges
type genus of the Adelgidae: plant lice
genus Adenota
African antelopes: puku
genus Aedes
yellow-fever mosquitos
genus Aegypius
a genus of Accipitridae
genus Aegyptopithecus
a genus of Hominoidea
genus Aepyceros
African antelopes: impalas
genus Aepyornis
type genus of the Aepyornidae: elephant birds
genus Aerobacter
aerobic bacteria widely distributed in nature
genus Aetobatus
a genus of Myliobatidae
genus Afropavo
Congo peafowl
genus Agama
type genus of the Agamidae
genus Agapornis
a genus of Psittacidae
genus Agelaius
red-winged blackbirds
genus Agkistrodon
genus Agonus
type genus of the Agonidae
genus Agriocharis
a genus of birds of the family Meleagrididae including the ocellated turkey
genus Agrobacterium
small motile bacterial rods that can reduce nitrates and cause galls on plant stems
genus Ailuropoda
only the giant panda: in some classifications considered a genus of the separate family Ailuropodidae
genus Ailurus
lesser pandas
genus Aix
wood duck and mandarin duck
genus Ajaia
a genus of Platalea
genus Alauda
type genus of the Alaudidae: skylarks
genus Albula
type and sole genus of the family Albulidae
genus Alca
type genus of the Alcidae comprising solely the razorbill
genus Alcedo
type genus of the Alcedinidae
genus Alcelaphus
African antelopes: hartebeests
genus Alces
elk or moose
genus Alectis
a genus of Carangidae
genus Alectoris
a genus of Perdicidae
genus Alectura
brush turkeys
genus Alepisaurus
slender scaleless predaceous tropical deep-sea fishes
genus Aleyrodes
type genus of the Aleyrodidae
genus Algeripithecus
an extinct genus of Hominoidea
genus Alligator
type genus of the Alligatoridae
genus Alopex
arctic foxes
genus Alopius
type genus of the family Alopiidae; in some classifications considered a genus of the family Lamnidae
genus Alosa
genus Alouatta
howler monkeys
genus Alsophila
geometrid moths
genus Alytes
midwife toads
genus Amazona
a genus of Psittacidae
genus Ambloplites
a genus of Centrarchidae
genus Amblyrhynchus
marine iguanas
genus Ambystoma
type genus of the Ambystomatidae
genus Ameiurus
type genus of the Ameiuridae: bullhead catfishes
genus Amia
type genus of the Amiidae
genus Ammodytes
type genus of the Ammodytidae
genus Ammotragus
genus of wild sheep
genus Amoeba
protozoan inhabiting moist soils or bottom vegetation in fresh or salt water
genus Amphibolips
cynipid gall wasps, especially causing oak-apple galls
genus Amphioxus
type genus of the Amphioxidae
genus Amphiprion
damsel fishes
genus Amphisbaenia
type genus of the Amphisbaenidae
genus Amphiuma
congo snakes
genus Anabas
the type genus of the family Anabantidae; small fish that resemble perch
genus Anabrus
a genus of Tettigoniidae
genus Anagasta
moth whose larvae are flour moths
genus Anarhichas
type genus of the Anarhichadidae
genus Anas
type genus of the Anatidae: freshwater ducks
genus Anasa
squash bugs
genus Anastomus
genus Anatotitan
genus of large duck-billed dinosaurs; late Cretaceous
genus Ancylus
type genus of the family Ancylidae: river limpet
genus Andrena
a solitary burrowing short-tongued bee
genus Andricus
cynipid gall wasps, chiefly affecting oaks
genus Aneides
climbing salamanders
genus Anguilla
type genus of the Anguillidae: eels
genus Anguillula
a genus of Cephalobidae
genus Anguis
type genus of the Anguidae: blindworms
genus Anhima
type genus of the Anhimidae; horned screamers
genus Anhinga
type genus of the Anhingidae
genus Anisotremus
a genus of Haemulidae
genus Ankylosaurus
armored herbivorous dinosaurs of the Cretaceous
genus Anoa
a genus of mammals of the family Bovidae
genus Anodonta
thin-shelled freshwater mussels
genus Anolis
New World chameleons
genus Anomala
genus of beetles whose grubs feed mainly on roots of plants; includes several pests of cultivated grasses
genus Anomalops
type genus of the family Anomalopidae
genus Anomalopteryx
small moas
genus Anomia
type genus of the family Anomiidae: saddle oysters
genus Anopheles
malaria mosquitoes; distinguished by the adult's head-downward stance and absence of breathing tubes in the larvae
genus Anser
typical geese
genus Antedon
a genus of echinoderms of the family Antedonidae
genus Antheraea
large moths whose larvae produce silk of high quality
genus Anthidium
potter bees
genus Anthonomus
weevils destructive of cultivated plants
genus Anthus
genus Antidorcas
genus Antigonia
a genus of fish in the family Caproidae
genus Antilocapra
type and sole genus of the Antilocapridae comprising one species
genus Antilope
genus Antrodemus
carnivorous dinosaur of North America; late Jurassic
genus Antrozous
a genus of Vespertilionidae
genus Aotus
genus Apatura
large Old World butterflies
genus Aphis
type genus of the Aphididae: injurious to fruit trees and vegetables
genus Aphriza
a genus of Scolopacidae
genus Aphrophora
a genus of Cercopidae
genus Apis
type genus of the Apidae: honeybees
genus Aplodontia
type genus of the Aplodontiidae: comprising the mountain beavers
genus Aplysia
type genus of the family Aplysiidae
genus Apodemus
Old World field mice
genus Apogon
type genus of the Apogonidae
genus Appendicularia
a genus of chordates in the class Larvacea
genus Aptenodytes
large penguins
genus Apteryx
type genus of the Apterygidae: kiwis
genus Apus
type genus
genus Aquila
a genus of Accipitridae
genus Ara
genus Aramus
genus of large brown long-billed wading birds found in warm swampy regions of the western hemisphere: courlan; limpkin
genus Araneus
a genus of orb-weaving spiders including common garden spiders and barn spiders
genus Arca
type genus of the family Arcidae: ark shells and blood clams
genus Arcella
type genus of the Arcellidae
genus Archaeopteryx
a genus of fossil birds
genus Archaeornis
a genus of fossil bird
genus Archidiskidon
a genus of Elephantidae
genus Archilochus
a genus of Trochilidae
genus Architeuthis
giant squid
genus Archosargus
a genus of Sparidae
genus Arctictis
genus Arctocebus
a genus of Lorisidae
genus Arctocephalus
fur seals
genus Arctonyx
a genus of Mustelidae
genus Ardea
type genus of the Ardeidae: large New and Old World herons
genus Arenaria
genus Argentina
type genus of the Argentinidae: argentines
genus Argentinosaurus
enormous dinosaur of the middle Cretaceous found in Argentina
genus Argiope
the type genus of Argiopidae; small genus of orb-weaving spiders
genus Argonauta
type genus of the family Argonautidae: paper nautilus
genus Argusianus
argus pheasants
genus Argynnis
genus Argyrotaenia
orange tortrix
genus Arilus
a genus of Reduviidae
genus Ariomma
a genus of Stromateidae
genus Arius
type genus of the Ariidae: sea catfishes
genus Arizona
glossy snake
genus Armadillidium
type genus of the Armadillidiidae
genus Artamus
type genus of the Artamidae
genus Arvicola
in some classifications considered synonymous with Microtus
genus Ascaphus
type genus of the Ascaphidae; in some classifications included in the family Leiopelmatidae
genus Ascaridia
roundworm having a preanal sucker
genus Ascaris
type genus of the family Ascaridae: roundworms with a three-lipped mouth
genus Ascophyllum
brown algae distinguished by compressed or inflated branchlets along the axis
genus Asio
a genus of European owls
genus Aspidelaps
African coral snakes
genus Aspidiotus
a genus of Diaspididae
genus Aspidophoroides
genus Astacus
type genus of the family Astacidae; Old World crayfish
genus Astrophyton
includes many of the basket stars
genus Astropogon
a genus of fish of the family Apogonidae
genus Ateles
spider monkeys
genus Athene
a genus of Strigidae
genus Atherinopsis
a genus of Atherinidae
genus Atherurus
a genus of Hystricidae
genus Atrichornis
type genus of the Atrichornithidae
genus Atticus
atlas moth
genus Aulacorhyncus
a genus of Ramphastidae
genus Aulostomus
type genus of the Aulostomidae
genus Auriparus
a genus of Paridae
genus Australopithecus
extinct genus of African hominid
genus Automeris
io moth
genus Avahi
a genus of Indriidae
genus Aythya
canvasback; redhead; pochard; etc.
genus Babyrousa
a genus of Suidae
genus Bacillus
type genus of the Bacillaceae; includes many saprophytes important in decay of organic matter and a number of parasites
genus Bacteroides
type genus of Bacteroidaceae; genus of Gram-negative rodlike anaerobic bacteria producing no endospores and no pigment and living in the gut of man and animals
genus Baiomys
pygmy mice
genus Bairdiella
genus Balaena
type genus of the Balaenidae: Greenland whales
genus Balaeniceps
type genus of the Balaenicipitidae: shoebills
genus Balaenoptera
type genus of the Balaenopteridae
genus Balanus
type genus of the family Balanidae
genus Balistes
type genus of the Balistidae
genus Bankia
giant shipworms
genus Barosaurus
huge quadrupedal herbivorous dinosaur; late Jurassic
genus Bartramia
a genus of Scolopacidae
genus Basiliscus
a reptile genus of Iguanidae
genus Bassariscus
genus Bathyergus
mole rats
genus Batrachoseps
slender salamanders
genus Bemisia
sweet-potato whitefly
genus Beroe
coextensive with the class Nuda
genus Bettongia
jerboa kangaroo
genus Bibos
wild ox
genus Bison
sometimes considered a subgenus of genus Bos: American buffalo
genus Bitis
a genus of Viperidae
genus Blaberus
giant cockroaches
genus Blarina
genus Blatta
type genus of the Blattidae: cockroaches infesting buildings worldwide
genus Blattella
small cockroaches
genus Blennius
type genus of the Blenniidae
genus Blissus
chinch bugs
genus Bombina
fire-bellied toads
genus Bombus
genus Bombyx
type genus of the Bombycidae: Chinese silkworm moth
genus Bonasa
ruffed grouse
genus Borrelia
small flexible parasitic spirochetes having three to five wavy spirals
genus Bos
wild and domestic cattle; in some classifications placed in the subfamily Bovinae or tribe Bovini
genus Boselaphus
Indian antelopes: nilgais
genus Botaurus
genus Bothrops
genus Brachinus
bombardier beetles
genus Bradypus
type genus of the Bradypodidae: three-toed sloths
genus Brama
type genus of the Bramidae
genus Branchiobdella
type genus of the Branchiobdellidae: a small worm that lives on the gills or surface of a crayfish attached by a sucker
genus Branta
wild geese
genus Brevoortia
genus Brontosaurus
large quadrupedal herbivorous dinosaurs with very long neck and tail; late Jurassic
genus Browmius
genus Bruchus
type genus of the Bruchidae
genus Bubalus
in some classification systems included in genus Bos; water buffaloes
genus Bubo
a genus of Strigidae
genus Bubulcus
small white egrets
genus Bucephala
buffleheads and goldeneyes
genus Buceros
type genus of the family Bucerotidae
genus Budorcas
gnu goats
genus Bufo
type genus of the Bufonidae; common toads of New and Old Worlds
genus Bungarus
genus Burhinus
type genus of the Burhinidae: stone curlews
genus Burmeisteria
a genus of Dasypodidae
genus Buteo
broad-winged soaring hawks
genus Cabassous
solely the tatouay
genus Cacajao
genus Cacatua
a genus of Psittacidae
genus Cacicus
a genus of tropical American orioles
genus Cadra
a genus of Pyralidae
genus Caenolestes
type genus of the family Caenolestidae
genus Caiman
genus Cairina
a genus of Anatidae
genus Calamus
a genus of Sparidae
genus Calidris
a genus of Scolopacidae
genus Callicebus
genus Callimorpha
cinnabar moths
genus Callinectes
New World blue crabs
genus Calliophis
Asian coral snakes
genus Calliphora
type genus of the Calliphoridae: blowflies
genus Callisaurus
zebra-tailed lizard
genus Callithrix
type genus of the Callithricidae: true marmosets
genus Callorhinus
fur seals
genus Calosoma
genus of large predaceous ground beetles that feed on injurious caterpillars
genus Calymmatobacterium
a genus of bacterial rods containing only the one species that causes granuloma inguinale
genus Cambarus
a genus of Astacidae
genus Camelus
type genus of the Camelidae: camels
genus Campephilus
a genus of Picidae
genus Camponotus
carpenter ants
genus Campylorhynchus
alternative classifications for the cactus wrens
genus Canachites
spruce grouse
genus Cancer
type genus of the family Cancridae
genus Canis
type genus of the Canidae: domestic and wild dogs; wolves; jackals
genus Capra
genus Caprella
skeleton shrimp
genus Capreolus
roe deer
genus Capricornis
genus Caprimulgus
type genus of the Caprimulgidae
genus Capros
a genus of fish in the family Caproidae
genus Caranx
type genus of the Carangidae
genus Carassius
genus Carcharhinus
type genus of the Carcharhinidae
genus Carcharias
type and sole genus of Carchariidae: sand sharks
genus Carcharodon
man-eating sharks
genus Cardium
type genus of the family Cardiidae: cockles
genus Carduelis
in some classifications considered the type genus of a subfamily Carduelinae of the family Fringillidae: goldfinches; siskins; redpolls; linnets
genus Caretta
loggerhead turtles
genus Cariama
the type genus of the Cariamidae comprising only the crested cariama
genus Carphophis
thunder snake
genus Carpocapsa
codling moths
genus Carpodacus
house finches and purple finches
genus Casmerodius
a white egrets
genus Castor
type genus of the Castoridae: beavers
genus Castoroides
extinct beavers of the Pleistocene; of eastern and southern United States
genus Casuarius
type and sole genus of the Casuaridae: cassowaries
genus Catacala
moths whose larvae are cutworms: underwings
genus Catharacta
genus Cathartes
type genus of the Cathartidae: turkey vultures
genus Catoptrophorus
genus Catostomus
type genus of the family Catostomidae
genus Cavia
type genus of the Caviidae: guinea pigs
genus Cebuella
pygmy marmosets
genus Cebus
type genus of the Cebidae
genus Centrocercus
sage grouse
genus Centropomus
type genus of the Centropomidae: snooks
genus Centropristis
sea basses
genus Centropus
a genus of Cuculidae
genus Cephalopterus
a genus of Cotingidae
genus Cepphus
a genus of birds including: guillemots
genus Cerapteryx
antler moths
genus Cerastes
horned vipers
genus Ceratitis
Mediterranean fruit flies
genus Ceratodus
type genus of the Ceratodontidae: extinct genus of lungfishes
genus Ceratopogon
type genus of the Ceratopogonidae
genus Ceratosaurus
primitive saurischian carnivorous dinosaurs
genus Ceratotherium
African genus
genus Cercocebus
genus Cercopithecus
type genus of the Cercopithecidae: guenons
genus Certhia
type genus of the Certhiidae
genus Cervus
the type genus of the Cervidae
genus Ceryle
a genus of birds of the family Alcedinidae
genus Cestum
Venus's girdle
genus Cetonia
a genus of Cetoniidae
genus Cetorhinus
comprising only the basking sharks; in some classifications considered the type genus of a separate family Cetorhinidae
genus Chaenopsis
a genus of fish of the family Clinidae including pikeblennies
genus Chaetodipterus
a genus of Ephippidae
genus Chaetodon
type genus of the Chaetodontidae
genus Chalcis
type genus of the Chalcididae
genus Chalcostigma
genus Chamaea
a genus of Paridae
genus Chamaeleon
type genus of the Chamaeleontidae
genus Chara
green algae common in freshwater lakes of limestone districts
genus Charadrius
type genus of the Charadriidae: plovers
genus Charina
boas of western North America
genus Charronia
a genus of Mustelidae
genus Chateura
a genus of Apodidae
genus Chauna
crested screamers
genus Chelifer
a genus of Chelonethida
genus Chelonia
green turtles
genus Chelydra
snapping turtles
genus Chilomastix
flagellates parasitic in intestines of vertebrates including humans
genus Chilomeniscus
sand snakes
genus Chilomycterus
genus Chimaera
type genus of the Chimaeridae
genus Chinchilla
type genus of the Chinchillidae
genus Chirocephalus
fairy shrimp; brine shrimp
genus Chironomus
type genus of the Chironomidae
genus Chiton
a genus of Polyplacophora
genus Chlamydera
a genus of Ptilonorhynchidae
genus Chlamydia
type genus of the family Chlamydiaceae: disease-causing parasites
genus Chlamydomonas
type genus of the Chlamydomonadaceae; solitary doubly-flagellated plant-like algae common in fresh water and damp soil; multiply freely; often a pest around filtration plants
genus Chlamydosaurus
frilled lizards
genus Chlamyphorus
genus Chlorella
nonmotile unicellular green algae potentially important as source of high-grade protein and B-complex vitamins
genus Chlorococcum
type genus of Chlorococcales; unicellular green algae occurring singly or in a layer on soil or damp rock
genus Chlorophis
African green snakes
genus Chlorophoneus
a genus of Malaconotinae
genus Chlorura
genus Choeronycteris
a genus of Phyllostomatidae
genus Choloepus
a genus of Megalonychidae consisting of the two-toed sloth
genus Chondrus
a genus of protoctist
genus Chordeiles
a genus of Caprimulgidae
genus Choriotis
Australian bustard
genus Chorizagrotis
moths whose larvae are army cutworms
genus Chronoperates
a reptile genus of Therapsida
genus Chrysaora
a genus of Scyphozoa
genus Chrysemys
painted turtles
genus Chrysochloris
type genus of the Chrysochloridae
genus Chrysolophus
golden pheasants
genus Chrysophrys
Australian snapper
genus Chunga
a genus of Cariamidae
genus Cicada
type genus of the Cicadidae: cicadas
genus Ciconia
type genus of the Ciconiidae: European storks
genus Cimex
type genus of the Cimicidae: bedbugs
genus Cinclus
type genus of the family Cinclidae
genus Circaetus
harrier eagles
genus Circus
a genus of haws comprising the harriers
genus Cistothorus
marsh wrens
genus Citharichthys
a genus of Bothidae
genus Cladorhyncus
one of two genera of stilts; similar to avocets but with straight bills
genus Clangula
a genus of ducks
genus Clethrionomys
a genus of Cricetidae
genus Clostridium
anaerobic or micro-aerophilic rod-shaped or spindle-shaped saprophytes; nearly cosmopolitan in soil, animal intestines, and dung
genus Clupea
type genus of the Clupeidae: typical herrings
genus Cnemidophorus
genus Coccothraustes
large finches
genus Coccus
type genus of the Coccidae
genus Coccyzus
a genus of Cuculidae
genus Cochlearius
genus Coelophysis
late Triassic carnivorous saurischian dinosaurs
genus Coereba
type genus of the Coerebidae
genus Colaptes
a genus of Picidae
genus Coleonyx
banded geckos
genus Colinus
New World quail: the bobwhites
genus Collocalia
a genus of Apodidae
genus Colobus
a genus of Cercopithecidae
genus Coluber
genus Columba
type genus of the Columbidae: typical pigeons
genus Comatula
former usage synonymous with Antedon
genus Compsognathus
a reptile genus of Theropoda
genus Condylura
star-nosed moles
genus Conepatus
a genus of Mustelidae
genus Conilurus
jerboa rats
genus Connochaetes
African antelopes: gnus
genus Contopus
genus Conuropsis
a genus of Psittacidae
genus Coracias
type genus of the Coraciidae
genus Coragyps
a genus of Cathartidae
genus Cordylus
type genus of the Cordylidae; spiny lizards somewhat resembling tiny crocodiles
genus Coregonus
type genus of the Coregonidae: whitefishes
genus Corixa
type genus of the Corixidae: boat bugs
genus Corvus
type genus of the Corvidae: crows and ravens
genus Corydalis
type genus of the Corydalidae
genus Corynebacterium
the type genus of the family Corynebacteriaceae which is widely distributed in nature; the best known are parasites and pathogens of humans and domestic animals
genus Corythosaurus
genus of duck-billed dinosaurs of late Cretaceous
genus Coscoroba
a genus of Anatidae
genus Cosmocampus
a genus of fish in the family Syngnathidae
genus Costia
a genus of flagellate protoctist
genus Cotinga
type genus of the Cotingidae: cotingas
genus Cottus
type genus of the Cottidae: sculpins
genus Coturnix
Old World quail
genus Cracticus
type genus of the Cracticidae: Australian butcherbirds
genus Crangon
type genus of the family Crangonidae
genus Crassostrea
Virginia oysters
genus Crax
type genus of the Cracidae: curassows
genus Crex
genus Cricetus
type genus of the Cricetidae: Old World hamsters
genus Crocethia
a genus of Scolopacidae
genus Crocodilus
type genus of the Crocodylidae
genus Crocuta
a genus of Hyaenidae
genus Crotalus
large rattlesnakes; seldom bite unless startled or pursuing prey
genus Crotaphytus
collared lizards
genus Crotophaga
genus Cryptacanthodes
a genus of Stichaeidae
genus Cryptobranchus
type genus of the Cryptobranchidae
genus Cryptocercus
genus Cryptoprocta
large primitive cat-like carnivores inhabiting forests of Madagascar
genus Cryptotermes
genus of dry wood termites; cosmopolitan in distribution; sometimes considered a subgenus of Kalotermes
genus Cryptotis
least shrews
genus Ctenocephalides
an arthropod genus of fleas
genus Ctenocephalus
a former usage synonymous with Ctenocephalides
genus Cuculus
type genus of the Cuculidae
genus Culex
type genus of the Culicidae: widespread genus of mosquitoes distinguished by holding the body parallel to the resting surface
genus Cuniculus
genus Cuon
Asiatic wild dog
genus Cursorius
genus Cuterebra
type genus of the Cuterebridae
genus Cyamus
whale lice
genus Cyanocitta
New World jays
genus Cyclopes
only the silky anteater
genus Cyclops
copepod water fleas
genus Cyclopterus
type genus of the Cyclopteridae: lumpfishes
genus Cygnus
a genus of Anatidae
genus Cynips
type genus of the Cynipidae: gall wasps
genus Cynocephalus
type genus of the family Cynocephalidae
genus Cynomys
prairie dogs
genus Cynopterus
a genus of Megachiroptera
genus Cynoscion
sea trout
genus Cypraea
type genus of the family Cypraeidae: the typical cowries
genus Cyprinus
type genus of the family Cyprinidae: carp
genus Cystophora
hooded seals
genus Dacelo
Australasian kingfishers
genus Dactylopius
type genus of the Dactylopiidae
genus Dactylopterus
a genus of Dactylopteridae
genus Dama
fallow deer
genus Damaliscus
African antelopes: sassabies
genus Danaus
type genus of the Danaidae: monarch butterflies
genus Daphnia
water fleas
genus Dasyatis
type genus of the Dasyatidae
genus Dasyprocta
type genus of the Dasyproctidae: agoutis
genus Dasypus
type genus of the Dasypodidae
genus Dasyurus
type genus of the family Dasyuridae: native cats
genus Daubentonia
type genus; coextensive with the family Daubentoniidae
genus Decapterus
scads especially mackerel scad; cosmopolitan in distribution
genus Deinocheirus
a reptile genus of Ornithomimida
genus Deinonychus
advanced bipedal carnivorous dinosaur
genus Delichon
a genus of Hirundinidae
genus Delphinapterus
white whale
genus Delphinus
type genus of the Delphinidae
genus Dendroaspis
genus Dendrocolaptes
type genus of the Dendrocolaptidae
genus Dendroctonus
genus of small bark beetles destructive especially to mature conifers
genus Dendroica
a genus of Parulidae
genus Dendrolagus
tree wallabies
genus Denisonia
genus Dermacentor
vectors of important diseases of man and animals
genus Dermatobia
larvae live under the skin of domestic mammals and humans
genus Dermochelys
type genus of the Dermochelyidae: leatherback turtles
genus Desmidium
a genus of protoctist
genus Desmodus
type genus of the Desmodontidae: vampire bats
genus Desmograthus
an amphibian genus of Plethodontidae
genus Diadophis
a genus of reptiles of the family Colubridae including ringneck snakes
genus Dialeurodes
a genus of Aleyrodidae
genus Diapheromera
a genus of Phasmidae
genus Dicamptodon
type genus of the Dicamptodontidae
genus Diceros
most common species in Africa
genus Dicrostonyx
pied lemmings
genus Didelphis
type genus of the family Didelphidae
genus Difflugia
genus of protozoans related to ameba
genus Dimetrodon
a reptile genus of Pelycosauria
genus Dinornis
type genus of the Dinornithidae: large moas
genus Diodon
type genus of the Diodontidae
genus Diomedea
type of the Diomedeidae
genus Diphylla
vampire bats
genus Diplococcus
a genus of bacteria
genus Diplodocus
a reptile genus of the suborder Sauropoda
genus Dipodomys
kangaroo rats
genus Dipsosaurus
desert iguanas
genus Dipus
type genus of the Dipodidae; typical jerboas having three toes on each hind foot
genus Dolichonyx
genus Dolichotis
genus Doliolum
type genus of the Doliolidae
genus Draco
a reptile genus known as flying dragons or flying lizards
genus Dracunculus
type genus of the family Dracunculidae
genus Dreissena
zebra mussels
genus Drepanis
a genus of Drepanididae
genus Dromaius
a genus of birds in the order Casuariiformes
genus Drosophila
a genus of Drosophilidae
genus Drymarchon
a genus of Colubridae
genus Dryopithecus
genus of Old World hominoids; Miocene and Pliocene
genus Dugong
type genus of the Dugongidae comprising only the dugongs
genus Dumetella
genus Dusicyon
crab-eating dog
genus Dysdercus
a genus of slender long-legged bugs that feed on the developing seeds of cotton and stain it
genus Eacles
imperial moths
genus Echeneis
type genus of the Echeneididae: typical remoras
genus Echidnophaga
a genus of Siphonaptera
genus Echinococcus
genus Ectopistes
a genus of Columbidae
genus Edaphosaurus
type genus of the Edaphosauridae
genus Edmontosaurus
duck-billed dinosaurs of Canada
genus Egretta
small Old and New World herons
genus Eimeria
type genus of the family Eimeriidae; includes serious pathogens
genus Eira
a genus of Mustelidae
genus Elagatis
a genus of Carangidae
genus Elanoides
a genus of kites
genus Elanus
a genus of small kites of both Old and New Worlds
genus Elaphe
North American rat snakes
genus Elaphurus
a genus of Cervidae
genus Electrophorus
type genus of the family Electrophoridae; electric eels
genus Elephas
type genus of the family Elephantidae
genus Eleutherodactylus
completely terrestrial robber frogs
genus Eliomys
genus Elops
type genus of the Elopidae: tenpounder
genus Emberiza
Old World buntings
genus Endamoeba
the type genus of the family Endamoebidae
genus Engraulis
type genus of the family Engraulidae
genus Enhydra
sea otters
genus Ensis
razor clams
genus Enterobius
genus Eoraptor
primitive theropod found in Argentina; early Triassic
genus Ephestia
small moths whose larvae spin silken tunnels and feed on stored food products
genus Ephippiorhynchus
genus Epilachna
genus of ladybugs native to Mexico and Central America; both larvae and adults feed on plants
genus Epinephelus
genus of groupers or sea bass
genus Eptatretus
a genus of fossil fish of the family Myxinidae
genus Eptesicus
a genus of Vespertilionidae
genus Equetus
genus Equus
type genus of the Equidae: only surviving genus of the family Equidae
genus Erethizon
a genus of Erethizontidae
genus Eretmochelys
genus Erignathus
bearded seals
genus Erinaceus
type genus of the family Erinaceidae: hedgehogs
genus Eriosoma
woolly aphids
genus Erithacus
Old World thrushes
genus Erolia
a genus of Scolopacidae
genus Erwinia
a genus of bacteria
genus Erythrocebus
genus Escherichia
a genus of bacteria
genus Eschrichtius
type and sole genus of the Eschrichtiidae
genus Esox
type and only genus of the family Esocidae
genus Estrilda
genus Etropus
a genus of Bothidae
genus Euarctos
American black bears; in some classifications not a separate genus from Ursus
genus Eucinostomus
a genus of Gerreidae
genus Euderma
a genus of Vespertilionidae
genus Eudyptes
rock hoppers
genus Euglena
type genus of the family Euglenaceae: green algae with a single flagellum
genus Eumeces
New World skinks
genus Eumenes
mason wasps
genus Eumetopias
sea lions
genus Eumops
mastiff bats
genus Eunectes
genus Euphagus
a genus of Icteridae
genus Euphractus
a genus of Dasypodidae
genus Euplectella
a genus of Hyalospongiae
genus Euproctis
a genus of Lymantriidae
genus Euryale
basket stars
genus Eutamias
chipmunks of western America and Asia
genus Euthynnus
a genus of Scombridae
genus Exaeretodon
a genus of reptiles of the division Cynodontia
genus Falco
a genus of Falconidae
genus Fasciola
a genus of Fasciolidae
genus Fasciolopsis
a genus of Fasciolidae
genus Felis
type genus of the Felidae: true cats and most wildcats
genus Fissurella
type genus of the family Fissurellidae: keyhole limpets
genus Fistularia
type genus of the family Fistulariidae
genus Forficula
type genus of Forficulidae
genus Formica
type genus of the Formicidae
genus Formicarius
type genus of the Formicariidae
genus Fossa
monotypic genus of Madagascar civets closely related to palm civets
genus Francisella
a genus of Gram-negative aerobic bacteria that occur as pathogens and parasite in many animals (including humans)
genus Frankliniella
tobacco thrips
genus Fratercula
genus Fregata
type genus of the Fregatidae
genus Fringilla
type genus of the Fringillidae: chaffinch, brambling
genus Fucus
type genus of the family Fucaceae: cartilaginous brown algae
genus Fulica
genus Fulmarus
genus Fundulus
genus Fungia
a genus comprising the usual mushroom corals
genus Furnarius
type genus of the family Furnariidae: ovenbirds
genus Gadus
type genus of the Gadidae: the typical codfishes
genus Galago
bush babies
genus Galeocerdo
tiger sharks
genus Galeorhinus
a genus of Carcharhinidae
genus Galictis
alternative name for the genus Grison
genus Galleria
a genus of Pyralidae
genus Gallinago
genus Gallinula
genus Gallirallus
rails of New Zealand
genus Gallus
common domestic birds and related forms
genus Gambelia
leopard lizards
genus Gambusia
genus Garrulus
type genus of the Garrulinae: Old World jays
genus Gasterophilus
type genus of the Gasterophilidae: horse botflies
genus Gastrophryne
primarily tropical narrow-mouthed toads
genus Gavia
type genus of the Gavidae: loons
genus Gavialis
type genus of the Gavialidae
genus Gazella
typical gazelles
genus Gelechia
type genus of the Gelechiidae: pink bollworms
genus Gempylus
type genus of the Gempylidae
genus Genetta
genus Genyonemus
a genus of Sciaenidae
genus Geochelone
giant tortoises
genus Geococcyx
genus Geomys
type genus of the Geomyidae
genus Geophilus
type genus of the Geophilidae: a cosmopolitan genus of centipedes sometimes called earwigs
genus Geothlypis
genus Gerbillus
type genus of the Gerbillinae: typical gerbils
genus Gerres
type genus of the Gerreidae
genus Gerrhonotus
alligator lizards
genus Gerris
type genus of the Gerrididae
genus Giardia
flagellates parasitic in intestines of vertebrates
genus Ginglymostoma
nurse sharks
genus Giraffa
type genus of the Giraffidae
genus Glareola
type genus of the Glareolidae: the pratincoles
genus Glaucomys
New World flying squirrels
genus Glis
type genus of the Gliridae
genus Globicephala
pilot whales
genus Globigerina
type genus of the family Globigerinidae
genus Glossina
type genus of the Glossinidae: tsetse flies
genus Glossopsitta
a genus of Loriinae
genus Gobiesox
type genus of the Gobiesocidae
genus Gobio
true gudgeons
genus Gomphotherium
type genus of the Gomphotheriidae
genus Gonorhynchus
slender cylindrical marine fishes lacking air bladders and teeth
genus Gopherus
gopher tortoises
genus Gorgonocephalus
basket stars
genus Gorilla
genus Gracula
genus Grampus
genus Grison
a genus of Mustelidae
genus Grus
type genus of the Gruidae: typical cranes
genus Gulo
a genus of Mustelidae
genus Gymnelis
a genus of Zoarcidae
genus Gymnogyps
containing solely the California condor
genus Gymnorhina
in some classifications placed in the family Laniidae: Australian piping crows
genus Gymnura
butterfly rays
genus Gypaetus
in some classifications the type genus of the family Aegypiidae
genus Gyps
a genus of Accipitridae
genus Haematobia
European genus of bloodsucking flies
genus Haematopus
genus Haemopis
genus Haemoproteus
type genus of the family Haemoproteidae
genus Haemulon
type genus of the Haemulidae
genus Halcyon
a large kingfisher widely distributed in warmer parts of the Old World
genus Haldea
ground snakes
genus Haliaeetus
a genus of Accipitridae
genus Halicoeres
a genus of Labridae
genus Haliotis
type genus of the family Haliotidae
genus Haminoea
common genus of marine bubble shells of the Pacific coast of North America
genus Harpia
a genus of Accipitridae
genus Heliobacter
a genus of helical or curved or straight aerobic bacteria with rounded ends and multiple flagella; found in the gastric mucosa of primates (including humans)
genus Heliothis
a genus of Noctuidae
genus Helix
type genus of the family Helicidae
genus Heloderma
type genus of the Helodermatidae; American venomous lizards
genus Hemachatus
genus Hemigalus
banded palm civets
genus Hemigrammus
genus Hemipteronatus
razor fish
genus Hemitripterus
sea ravens
genus Hermissenda
genus of marine sea slugs
genus Herpestes
genus Herrerasaurus
primitive theropod found in Argentina; early Triassic
genus Hesperiphona
evening grosbeak
genus Heterocephalus
sand rats
genus Heterodon
a genus of small colubrid snakes containing the North American hognose snakes
genus Heteroscelus
genus Hexagrammos
type genus of the Hexagrammidae
genus Hexamita
flagellates free-living or parasitic in intestines of birds
genus Hexanchus
a genus of Hexanchidae
genus Himantopus
major one of two genera of stilts; similar to avocets but with straight bills
genus Hippobosca
type genus of the Hippoboscidae
genus Hippocampus
genus Hippodamia
genus of ladybugs
genus Hippoglossoides
a genus of Pleuronectidae
genus Hippoglossus
genus Hippopotamus
type genus of the Hippopotamidae
genus Hipposideros
horseshoe bats
genus Hippotragus
sable antelopes
genus Hipsurus
a genus of Embiotocidae
genus Hirudo
type genus of the family Hirudinidae
genus Hirundo
type genus of the Hirundinidae
genus Holbrookia
earless lizards
genus Holocentrus
type genus of the family Holocentridae; squirrelfishes
genus Holothuria
type genus of the Holothuridae
genus Homarus
type genus of the family Homaridae: common edible lobsters
genus Homo
type genus of the family Hominidae
genus Homona
tea tortrix
genus Hyaena
type genus of the Hyaenidae
genus Hyalophora
American silkworm moth
genus Hydra
genus Hydrobates
type genus of the Hydrobatidae
genus Hydrochoerus
a genus of Hydrochoeridae
genus Hydrodamalis
a genus of the family Dugongidae comprising only Steller's sea cow
genus Hydromantes
web-toed salamanders
genus Hydromys
water rats
genus Hyemoschus
water chevrotains
genus Hyla
the type genus of the Hylidae; tree toads
genus Hylactophryne
barking frogs
genus Hylobates
genus Hylocichla
American thrush: wood thrush; hermit thrush; veery
genus Hylophylax
a genus of Formicariidae
genus Hynerpeton
earliest fossil amphibian ever found; of the Devonian; found in Pennsylvania
genus Hypentelium
a genus of fish in the family Catostomidae
genus Hyperoglyphe
a genus of Stromateidae
genus Hyperoodon
bottle-nosed whales
genus Hyphantria
fall webworms
genus Hypoderma
in some classifications considered the type genus of the family Hypodermatidae: warble flies
genus Hypopachus
sheep frogs
genus Hypsiglena
night snakes
genus Hypsiprymnodon
musk kangaroos
genus Hyracotherium
extinct horse genus; formerly called eohippus
genus Ibero-mesornis
a genus of fossil bird of the subclass Archaeornithes
genus Ibis
genus Ichthyosaurus
type genus of the Ichthyosauridae
genus Ichthyostega
second earliest fossil amphibian ever found; of the Devonian; found in Greenland
genus Ictalurus
channel catfishes
genus Icteria
New World chats
genus Icterus
type genus of the Icteridae
genus Ictiobus
buffalo fishes
genus Ictonyx
a genus of Mustelidae
genus Iguana
type genus of the Iguanidae
genus Iguanodon
type genus of the Iguanodontidae
genus Inachis
a genus of Nymphalidae
genus Indri
type genus of the Indriidae
genus Irena
type genus of the Irenidae: fairy bluebirds
genus Iridoprocne
a genus of Hirundinidae
genus Ischigualastia
early reptile found in Argentina
genus Istiophorus
type genus of the Istiophoridae
genus Isurus
mako sharks
genus Ixobrychus
genus Ixodes
type genus of the family Ixodidae
genus Jabiru
genus Jaculus
genus Javanthropus
former genus of primitive man; now Homo soloensis: comprises Solo man
genus Jordanella
genus Junco
American finches
genus Jynx
genus Kalotermes
type genus of Kalotermitidae; termites destructive of wood and living trees
genus Katsuwonus
oceanic bonitos; in some classifications placed in its own family Katsuwonidae
genus Kenyapithecus
extinct primate having powerful chewing muscles along with large molars and small incisors; fossils found in Kenya
genus Kinosternon
type genus of the Kinosternidae
genus Klebsiella
a genus of bacteria
genus Kobus
African antelopes: waterbucks
genus Kogia
pygmy sperm whales
genus Krypterophaneron
a genus of fish in the family Anomalopidae
genus Kyphosus
type genus of the Kyphosidae
genus Lacerta
type genus of the Lacertidae
genus Lachnolaimus
a genus of Labridae
genus Lactobacillus
type genus of the family Lactobacillaceae
genus Lactophrys
a genus of Ostraciidae
genus Lagidium
a genus of Chinchillidae
genus Lagodon
a genus of Sparidae
genus Lagopus
genus Lagorchestes
hare wallabies
genus Lagostomus
genus Lagothrix
woolly monkeys
genus Lama
genus Lambis
scorpion shells of shallow tropical waters of the eastern hemisphere
genus Laminaria
type genus of the family Laminariaceae: perennial brown kelps
genus Lamna
a genus of Lamnidae
genus Lampris
type genus of the Lampridae
genus Lampropeltis
king snakes and milk snakes
genus Lanius
type genus of the Laniidae: typical shrikes
genus Lanthanotus
one species
genus Larus
type genus of the Laridae
genus Lasiocampa
type genus of the Lasiocampidae: eggars
genus Lasiurus
a genus of Vespertilionidae
genus Lates
a genus of large percoid fishes of fresh and brackish water
genus Latimeria
type genus of the Latimeridae: coelacanth
genus Latrodectus
venomous spiders
genus Lebistes
genus Leiopelma
type and sole genus of the family Leiopelmatidae
genus Leipoa
mallee fowl
genus Leishmania
flagellate protozoan that causes leishmaniasis
genus Lemur
type genus of the Lemuridae
genus Leontocebus
genus Lepas
type genus of the family Lepadidae
genus Lepidochelys
genus Lepidocybium
a genus of Gempylidae
genus Lepisma
type genus of the Lepismatidae: silverfish
genus Lepisosteus
type genus of the Lepisosteidae: freshwater gars
genus Lepomis
genus Leptinotarsa
Colorado potato beetles
genus Leptodactylus
type genus of the Leptodactylidae; in some classifications placed in the family Bufonidae
genus Leptoglossus
leaf-footed bugs
genus Leptoptilus
adjutant birds and marabous
genus Leptospira
very slender aerobic spirochetes; free-living or parasitic in mammals
genus Leptotyphlops
blind snakes of Asia and Africa and Americas
genus Lepus
type genus of the Leporidae: hares
genus Leuciscus
a genus of fish including: dace, chub
genus Leucocytozoon
a genus of protoctist
genus Lichanura
boas of western North America
genus Limanda
a genus of Pleuronectidae; righteye flounders having a humped nose and small scales; the underside is often brightly colored
genus Limax
a genus of Limacidae
genus Limenitis
mainly dark northern butterflies with white wing bars
genus Limnocryptes
genus Limnodromus
genus Limosa
genus Limulus
type genus of the family Limulidae
genus Liomys
pocket mice
genus Liparis
type genus of the Liparididae: snailfishes
genus Liposcelis
a genus of Psocidae
genus Listeria
a genus of aerobic motile bacteria of the family Corynebacteriaceae containing small Gram-positive rods
genus Litocranius
antelopes of eastern Africa: gerenuks
genus Littorina
type genus of the family Littorinidae: periwinkles
genus Lobipes
a genus of Phalaropidae
genus Lobotes
type genus of the Lobotidae
genus Locusta
a genus of Acrididae
genus Lofortyx
California quail
genus Loligo
genus Lophius
type genus of family Lophiidae
genus Lophodytes
a genus of Merginae
genus Lopholatilus
large brightly colored food fish of deep Atlantic waters
genus Lophophorus
genus Loris
type genus of the Lorisidae
genus Lota
genus Loxia
genus Loxodonta
a genus of Elephantidae
genus Loxostege
garden webworms
genus Lucilia
greenbottle flies
genus Lufengpithecus
a genus of Hominidae
genus Lumpenus
a genus of Stichaeidae
genus Lunda
genus Luscinia
genus Lutjanus
type genus of the Lutjanidae: snappers
genus Lutra
in some classifications considered a genus of the subfamily Lutrinae
genus Luvarus
type genus of the Luvaridae
genus Lycaena
type genus of the Lycaenidae; small slender butterflies with upper surface of wings usually metallic blue or green or copper
genus Lycaeon
African hunting dog
genus Lycosa
type genus of the family Lycosidae
genus Lygus
plant-sucking bugs
genus Lymantria
type genus of the Lymantriidae; a pest (Lymantria means `destroyer')
genus Lynx
genus Lyrurus
black grouse
genus Macaca
macaques; rhesus monkeys
genus Macrocephalon
genus Macrocheira
giant crabs of Japan
genus Macroclemys
includes the alligator snapping turtle
genus Macrodactylus
a genus of Melolonthidae
genus Macronectes
giant petrels
genus Macropus
type genus of the family Macropodidae: typical kangaroos and wallabies
genus Macrotis
a genus of Peramelidae
genus Macrotus
leafnose bats
genus Macrozoarces
a genus of Zoarcidae
genus Madoqua
genus comprising some small antelopes of eastern and northeastern Africa
genus Maeandra
brain corals
genus Magicicada
seventeen-year locust
genus Maja
type genus of the Majidae; nearly cosmopolitan in distribution
genus Makaira
genus Malaclemys
American terrapins
genus Malacosoma
tent caterpillars
genus Mallotus
genus Malopterurus
electric catfish
genus Mammuthus
extinct genus: mammoths
genus Mandrillus
genus Manduca
moths whose larvae are tobacco hornworms or tomato hornworms
genus Manis
type genus of the Manidae
genus Manta
a genus of Mobulidae
genus Mantis
type genus of the Mantidae: mantises
genus Marmota
genus Martes
genus Masticophis
whip snakes
genus Mastigoproctus
giant whip scorpions
genus Mastodon
extinct type genus of the Mammutidae: mastodons
genus Mastotermes
primitive genus of termites; mostly extinct; sometimes considered the most primitive Isoptera
genus Maxostoma
a genus of fish in the family Catostomidae
genus Mayetiola
a genus of Cecidomyidae
genus Mazama
genus Megachile
type genus of the Megachilidae: leaf-cutting bees
genus Megaderma
type genus of the Megadermatidae
genus Megalobatrachus
giant salamanders; in some classifications included in the genus Cryptobranchus
genus Megalosaurus
type genus of the Megalosauridae
genus Megaptera
humpback whales
genus Megatherium
type genus of the Megatheriidae
genus Melanerpes
a genus of Picidae
genus Melanitta
genus Melanogrammus
genus Melanoplus
New World migratory locusts and common American grasshoppers
genus Melanotis
a genus of Mimidae
genus Meleagris
type genus of the Meleagrididae: wild and domestic turkeys
genus Meles
in some classifications: type genus of the subfamily Melinae
genus Mellivora
genus Melogale
a genus of Mustelidae
genus Melolontha
a genus of Melolonthidae
genus Melophagus
an arthropod genus of wingless flies including the sheep ked
genus Melopsittacus
a genus of Psittacidae
genus Melospiza
American song sparrow and swamp sparrow
genus Melursus
sloth bears; in some classifications not a separate genus from Ursus
genus Menippe
stone crabs
genus Menopon
chicken lice
genus Menticirrhus
kingfishes; whiting
genus Menura
type and sole genus of the family Menuridae
genus Mephitis
in some classifications: type genus of the subfamily Mephitinae
genus Mercenaria
a genus of Veneridae
genus Mergus
genus Meriones
a genus of Cricetidae
genus Merlangus
genus Merluccius
genus Merops
type genus of the Meropidae
genus Mesocricetus
golden hamsters
genus Mesohippus
a genus of Equidae
genus Microcentrum
genus Micrococcus
type genus of the family Micrococcaceae
genus Microdipodops
kangaroo mice
genus Micromyx
Old World harvest mice
genus Micropogonias
genus Micropterus
American freshwater black basses
genus Microstomus
a genus of Pleuronectidae
genus Microtus
voles of the northern hemisphere
genus Micruroides
coral snakes
genus Micrurus
coral snakes
genus Mimus
type genus of the family Mimidae: mockingbirds
genus Mirounga
elephant seals
genus Mobula
type genus of the Mobulidae
genus Mola
type genus of the Molidae
genus Mollienesia
genus Moloch
genus of Australian desert lizard
genus Molothrus
genus Molva
genus Momotus
type genus of the Momotidae
genus Monocanthus
type genus of the Monocanthidae
genus Monochamus
sawyer beetles
genus Monodon
type genus of the Monodontidae
genus Monomorium
a genus of Formicidae
genus Mononychus
authorities disagree over whether to classify the genus as bird or dinosaur
genus Morone
carnivorous fresh and salt water fishes
genus Moschus
musk deer
genus Motacilla
type genus of the Motacillidae: wagtails
genus Mugil
type genus of the Mugilidae: mullets
genus Mulloidichthys
a genus of Mullidae
genus Mullus
type genus of the Mullidae: goatfishes
genus Muntiacus
genus Mus
type genus of the Muridae: common house mice; the tips of the upper incisors have a square notch
genus Musca
type genus of the Muscidae: houseflies
genus Muscardinus
a genus of Gliridae
genus Muscicapa
type genus of the Muscicapidae
genus Muscivora
a genus of Tyrannidae
genus Musophaga
type genus of the Musophagidae
genus Mustela
type genus of the family Mustelidae: minks and weasels
genus Mustelus
smooth dogfishes
genus Mya
type genus of the family Myacidae
genus Myadestes
genus Mycobacterium
nonmotile Gram-positive aerobic bacteria
genus Mycoplasma
type and sole genus of the family Mycoplasmataceae
genus Mycteria
a genus of storks of the family Ciconiidae now including only the American wood ibis
genus Mycteroperca
genus Mylodon
type genus of the Mylodontidae; sometimes included in family Megatheriidae
genus Myocastor
a genus of Capromyidae
genus Myopus
a genus of Cricetidae
genus Myotis
largest and most widely distributed genus of bats
genus Myrmecia
bulldog ants
genus Myrmecobius
banded anteater
genus Myrmecophaga
type genus of the Myrmecophagidae; South American ant bear
genus Myrmeleon
type genus of the Myrmeleontidae: antlions
genus Mysis
type genus of the family Mysidae
genus Mytilus
type genus of the family Mytilidae: smooth-shelled marine mussels
genus Myxine
type genus of the Myxinidae (typical hagfishes)
genus Myxinikela
fossil hagfishes
genus Myxocephalus
genus Naemorhedus
genus Naja
genus Nanomia
a genus of Siphonophora
genus Nasalis
proboscis monkeys
genus Nasua
genus Natrix
water snakes; a cosmopolitan genus
genus Naucrates
a genus of Carangidae
genus Nautilus
type genus and sole recent representative of the family Nautilidae
genus Necturus
a genus of Proteidae
genus Negaprion
lemon sharks
genus Neoceratodus
extant Australian lungfishes
genus Neofiber
round-tailed muskrat
genus Neomys
a genus of Soricidae
genus Neophron
a genus of Accipitridae
genus Neotoma
genus Nepa
type genus of the Nepidae: typical elongate-oval water scorpions
genus Nephrops
a genus of Nephropsidae
genus Nerita
type genus of the Neritidae
genus Neritina
a genus of Neritidae
genus Nerodia
North American water snakes
genus Nesokia
bandicoot rats
genus Nestor
a genus of Psittacidae
genus Neurotrichus
shrew moles
genus Nimravus
false sabertoothed tigers
genus Nitella
fragile branching stoneworts
genus Nitrobacter
rod-shaped soil bacteria
genus Nitrosomonas
ellipsoidal soil bacteria
genus Noctiluca
a genus of protoctist
genus Noctua
type genus of the Noctuidae: moths whose larvae are cutworms
genus Nomia
a genus of bee; some are important pollinators of legumes
genus Nostoc
type genus of the family Nostocaceae: freshwater blue-green algae
genus Notechis
tiger snakes
genus Notemigonus
golden shiners
genus Nothosaurus
a genus of Nothosauria
genus Notomys
jerboa rats
genus Notonecta
type genus of the Notonectidae: backswimmers
genus Notophthalmus
genus Notornis
a genus of Rallidae
genus Notoryctus
type genus of the family Notoryctidae: comprising solely the marsupial mole
genus Notropis
genus Nucifraga
genus Numenius
genus Numida
guinea fowl
genus Nyctanassa
American night herons
genus Nyctereutes
raccoon dogs
genus Nycticebus
a genus of Lorisidae
genus Nycticorax
Old World night herons
genus Nyctimene
East Indian fruit bats
genus Nymphalis
type genus of the Nymphalidae: mourning cloak butterflies
genus Nymphicus
a genus of Psittacidae
genus Oceanites
a genus of Hydrobatidae
genus Ochotona
type genus of the Ochotonidae
genus Octopus
type genus of the family Octopodidae
genus Ocyurus
genus Odobenus
type genus of the Odobenidae: walruses
genus Odocoileus
North American deer
genus Odontophorus
genus of Central and South American crested partridges resembling quails; sometimes placed in a distinct subfamily or isolated in a distinct family
genus Oecanthus
tree crickets
genus Oedogonium
type genus of Oedogoniaceae; freshwater green algae having long unbranched filaments; usually free-floating when mature
genus Oenanthe
genus Oestrus
type genus of the Oestridae: sheep botflies
genus Okapia
genus Oligoplites
genus Ommastrephes
a genus of Decapoda
genus Oncorhynchus
Pacific salmon including sockeye salmon; chinook salmon; chum salmon; coho salmon
genus Ondatra
genus Oniscus
type genus of the Oniscidae; woodlice that cannot roll into a ball
genus Onychogalea
a genus of Macropodidae
genus Onychomys
grasshopper mice
genus Opheodrys
North American green snakes
genus Ophiodon
a genus of Ophiodontidae
genus Ophiophagus
king cobra
genus Ophisaurus
glass lizards
genus Opisthocomus
type genus of the Opisthocomidae: hoatzins
genus Orchestia
type genus of the family Orchestiidae
genus Orcinus
killer whales
genus Oreamnos
mountain goats
genus Orectolobus
carpet sharks
genus Oreortyx
mountain quail of western United States
genus Oriolus
type genus of the Oriolidae
genus Ornithorhynchus
type genus of the family Ornithorhynchidae
genus Ortalis
genus Orthopristis
a genus of Haemulidae
genus Orthotomus
genus Orycteropus
coextensive with the family Orycteropodidae
genus Oryctolagus
Old World rabbits
genus Oryx
African antelopes: oryxes
genus Oryzomys
rice rats
genus Osmerus
type genus of the Osmeridae
genus Ostrea
type genus of the family Ostreidae
genus Otaria
type genus of the Otariidae
genus Otis
type genus of the Otididae: European bustard
genus Otus
a genus of Strigidae
genus Ouranopithecus
a genus of Hominidae
genus Ovalipes
a genus of Portunidae
genus Ovibos
consisting of the musk-ox
genus Ovis
genus Oxybelis
vine snakes
genus Oxylebius
a genus of Hexagrammidae
genus Oxyura
ruddy duck
genus Oxyuranus
genus Pachycephala
arboreal insectivorous birds
genus Padda
a genus of Ploceidae
genus Pagellus
sea breams
genus Pagophila
a genus of Laridae
genus Pagophilus
harp seals
genus Pagrus
a genus of Sparidae
genus Pagurus
type genus of the family Paguridae
genus Palaemon
type genus of the family Palaemonidae; widely distributed genus
genus Paleacrita
geometrid moths
genus Palinurus
type genus of the family Palinuridae
genus Palometa
a genus of Stromateidae
genus Pan
chimpanzees; more closely related to Australopithecus than to other pongids
genus Pandion
type genus of the Pandionidae
genus Panonychus
a genus of Tetranychidae
genus Panthera
lions; leopards; snow leopards; jaguars; tigers; cheetahs; saber-toothed tigers
genus Papio
genus Paprilus
a genus of Stromateidae
genus Paracheirodon
a genus of Characidae
genus Paradoxurus
palm civets
genus Paralichthys
a genus of Bothidae
genus Paralithodes
a genus of Lithodidae
genus Paramecium
freshwater ciliate with an oval body and long deep oral groove
genus Paranthias
a genus of Serranidae
genus Paranthropus
former classification for Australopithecus robustus
genus Parascalops
brewer's moles
genus Parophrys
a genus of Soleidae
genus Parula
type genus of the Parulidae: wood warblers
genus Parus
type genus of the family Paridae
genus Passer
type genus of the Passeridae
genus Passerina
a genus of small North American finches including the New World buntings
genus Patella
type genus of the family Patellidae: common European limpets
genus Pavo
genus Pecten
type genus of the family Pectinidae: sea and bay scallops
genus Pediculus
type genus of Pediculidae: true lice infecting humans
genus Pedioecetes
sharp-tailed grouse
genus Pedionomus
plain wanderer
genus Pelecanus
type genus of the Pelecanidae
genus Penelope
a genus of guans (turkey-like arboreal birds valued as game and food birds)
genus Peneus
type genus of the family Peneidae
genus Pennatula
type genus of the family Pennatulidae: sea pens
genus Perca
type genus of the Percidae
genus Percina
a genus of Percidae
genus Perdix
a genus of Perdicinae
genus Peridinium
type genus of the family Peridiniidae
genus Periophthalmus
a genus of Gobiidae
genus Peripatopsis
type genus of Peripatopsidae; onychophorans of chiefly Asiatic and African tropical regions
genus Peripatus
type genus of Peripatidae; onychophorans of chiefly New World tropical regions
genus Periplaneta
cosmopolitan genus of large cockroaches
genus Perisoreus
Canada jays
genus Peristedion
in some classifications the type genus of the subfamily Peristediinae: armored sea robins
genus Pernis
a common European bird of prey; dull brown with white-streaked underparts
genus Perodicticus
a genus of Lorisidae
genus Perognathus
pocket mice
genus Peromyscus
New World wood mice
genus Petaurista
very large Asiatic flying squirrels
genus Petaurus
a genus of Phalangeridae
genus Petrogale
rock wallabies
genus Petromyzon
typical lampreys
genus Pezophaps
constituted by the extinct solitaire
genus Phacochoerus
genus Phaethon
type genus of the Phaethontidae
genus Phalacrocorax
type genus: coextensive with the family Phalacrocoracidae
genus Phalaenoptilus
a genus of Caprimulgidae
genus Phalanger
type genus of the family Phalangeridae: cuscuses
genus Phalangium
type genus of the family Phalangiidae
genus Phalaropus
type genus of the Phalaropidae: phalaropes
genus Pharomacrus
a genus of Trogonidae
genus Phascogale
pouched mice
genus Phascolarctos
genus Phasianus
type genus of the Phasianidae: the typical pheasants
genus Phenacomys
North American voles
genus Philaenus
a genus of Cercopidae
genus Philohela
American woodcocks
genus Philomachus
genus Philophylla
leaf miners
genus Phlebotomus
small bloodsucking sand flies that resemble moths
genus Phoca
type genus of the Phocidae: earless seals
genus Phocoena
genus Phoeniculus
type and only genus of the family Phoeniculidae
genus Phoenicurus
Old World thrushes
genus Pholas
type genus of the family Pholadidae: piddocks
genus Pholis
type genus of the Pholidae: gunnels
genus Photoblepharon
a genus of fish in the family Anomalopidae
genus Phoxinus
genus Phrynosoma
horned lizards
genus Phthirius
true lice: crab lice
genus Phthorimaea
potato moths
genus Phyllium
type genus of the Phyllidae
genus Phyllorhynchus
leaf-nosed snakes
genus Phylloscopus
genus Phyllostomus
type genus of the family Phyllostomatidae
genus Phylloxera
type genus of the Phylloxeridae: plant lice
genus Physa
type genus of the Physidae; freshwater air-breathing snails
genus Physalia
Portuguese man-of-war
genus Physeter
type genus of the Physeteridae
genus Pica
genus Picoides
a genus of Picidae
genus Picumnus
a genus of Picidae
genus Picus
type genus of Picidae
genus Pieris
type genus of the Pieridae
genus Pinctada
pearl oysters
genus Pineus
a genus of Adelgidae
genus Pinguinus
great auk
genus Pinicola
a genus of Fringillidae
genus Pinnotheres
type genus of the family Pinnotheridae: pea crabs
genus Pipa
type genus of the Pipidae
genus Pipile
genus of large crested guans (the piping guans)
genus Pipilo
genus Pipistrellus
nearly cosmopolitan genus of very small bats
genus Pipra
type genus of the Pipridae containing the typical manakins
genus Piranga
a genus of Thraupidae
genus Piroplasma
type genus of the family Babesiidae
genus Pisanosaurus
primitive ornithischian dinosaur found in Argentina; early Triassic
genus Pithecia
genus Pitta
type genus of the Pittidae; a large genus of birds of southern Asia and Australia and adjacent islands
genus Pituophis
bull snakes
genus Pitymys
pine mice
genus Placuna
windowpane oysters
genus Planococcus
a genus of Pseudococcidae
genus Plasmodium
type genus of the family Plasmodiidae
genus Platalea
type genus of the Plataleidae
genus Platichthys
a genus of Pleuronectidae
genus Platypoecilus
genus Plautus
a genus of Alcidae
genus Plecotus
a genus of Vespertilionidae
genus Plectrophenax
snow bunting
genus Plesianthropus
former name for the genus Australopithecus
genus Plesiosaurus
a reptile genus of suborder Plesiosauria
genus Plethodon
type genus of the Plethodontidae
genus Pleurobrachia
sea gooseberries
genus Pleuronectes
type genus of the Pleuronectidae
genus Plicatoperipatus
a genus of Peripatidae
genus Ploceus
type genus of the Ploceidae
genus Pluvialis
golden plovers
genus Pluvianus
genus Podargus
type genus of the Podargidae
genus Podiceps
type genus of the Podicipedidae: grebes
genus Podilymbus
a genus of Podicipedidae
genus Poecilocapsus
a genus of Miridae
genus Poecilogale
genus Poephila
genus Polioptila
New World gnatcatchers
genus Polistes
a genus of Vespidae
genus Pollachius
genus Polyangium
type genus of the family Polyangiaceae: myxobacteria with rounded fruiting bodies enclosed in a membrane
genus Polyborus
a genus of Falconidae
genus Polycirrus
genus of soft-bodied polychete marine worms
genus Polydactylus
a genus of Polynemidae
genus Polyergus
Amazon ants
genus Polygonia
comma butterflies
genus Polyodon
type genus of the Polyodontidae
genus Polypedates
type genus of the Polypedatidae
genus Polyprion
genus Pomacanthus
genus Pomacentrus
type genus of the Pomacentridae: damselfishes
genus Pomatomus
type genus of the Pomatomidae
genus Pomolobus
genus to which the alewife is sometimes assigned
genus Pomoxis
genus Pongo
type genus of the family Pongidae: orangutans
genus Pooecetes
a genus of Fringillidae
genus Popillia
a genus of Scarabaeidae
genus Porcellio
Old World genus of isopod crustaceans
genus Poronotus
a genus of Stromateidae
genus Porphyra
a genus of protoctist
genus Porphyrio
Old World purple gallinules
genus Porphyrula
American purple gallinules
genus Portunus
type genus of the family Portunidae
genus Porzana
spotted crakes
genus Potamogale
type genus of the family Potamogalidae: otter shrews
genus Potamophis
ground snakes
genus Potorous
genus Potos
a genus of Procyonidae
genus Praunus
a genus of Mysidae
genus Priacanthus
type genus of the Priacanthidae
genus Prinia
a genus of Sylviidae
genus Priodontes
solely the giant armadillo
genus Prionace
blue sharks
genus Prionotus
a genus of Triglidae
genus Pristis
type genus of the Pristidae
genus Procavia
type genus of the Procaviidae
genus Procellaria
type genus of the Procellariidae
genus Prociphilus
a genus of Aphididae
genus Procnias
genus Proconsul
genus of extinct primitive African primates of the Miocene epoch; sometimes considered a subgenus of Dryopithecus
genus Procyon
the type genus of the family Procyonidae: raccoons
genus Progne
a genus of Hirundinidae
genus Prosopium
genus Proteles
genus Proterochampsa
early archosaurian carnivore
genus Proteus
type genus of the Proteidae
genus Protoavis
extinct primitive birds of the Triassic period; 70 million years before archaeopteryx
genus Protoceratops
small horned dinosaurs
genus Protohippus
a genus of Equidae
genus Prunella
type genus of the Prunellidae
genus Psaltriparus
a genus of Paridae
genus Psenes
a genus of Stromateidae
genus Psephurus
a genus of Polyodontidae
genus Psetta
a genus of Bothidae
genus Psettichthys
a genus of Soleidae
genus Pseudacris
chorus frogs
genus Pseudaletia
moths whose larvae are armyworms
genus Pseudechis
venomous Australian blacksnakes
genus Pseudemys
sliders; red-bellied terrapin
genus Pseudococcus
type genus of the Pseudococcidae
genus Pseudomonas
type genus of the family Pseudomonodaceae
genus Pseudopleuronectes
a genus of Pleuronectidae
genus Pseudoryx
species of large cow-like mammals of Vietnam discovered by scientists in 1992
genus Psithyrus
a large bee that resembles the bumblebee but lacks pollen-collecting apparatus and a worker caste
genus Psittacosaurus
most primitive genus of horned dinosaurs; early Cretaceous
genus Psittacula
a genus of Psittacidae
genus Psittacus
type genus of the Psittacidae: usually restricted to the African grey
genus Psophia
type genus of the Psophiidae: trumpeters
genus Pternohyla
burrowing tree frogs
genus Pterocles
type genus of the Pteroclididae
genus Pterocnemia
a genus of birds of the family Rheidae
genus Pterodactylus
a reptile genus of Pterodactylidae
genus Pterois
genus Pteropus
a genus of Megachiroptera
genus Ptilocercus
genus Ptilocrinus
sea lilies
genus Ptilonorhynchus
type genus of the Ptilonorhynchidae
genus Ptloris
a genus of Paradisaeidae
genus Ptyas
Asian rat snakes
genus Ptychozoon
flying geckos
genus Puffinus
genus Pulex
type genus of the Pulicidae
genus Pygopus
type genus of the Pygopodidae; snake-shaped pleurodont lizard with no forelimbs and only rudimentary hind limbs
genus Pygoscelis
a genus of Spheniscidae
genus Pylodictus
flathead catfishes
genus Pyralis
type genus of the Pyralidae
genus Pyrausta
moths whose larvae are corn borers
genus Pyrocephalus
a genus of Tyrannidae
genus Pyrophorus
tropical click beetles
genus Pyrrhula
genus Pyrrhuloxia
large showy finches related to cardinals
genus Python
Old World boas
genus Quiscalus
genus Rachycentron
genus and family are coextensive and comprise only the cobia
genus Raja
type genus of the family Rajidae
genus Ramphomicron
genus Rana
type genus of the Ranidae
genus Ranatra
elongate very slender water scorpions
genus Rangifer
reindeer or caribou
genus Raphicerus
African antelopes: steenboks
genus Raphus
type genus of the Raphidae: dodos
genus Rattus
common house rats; upper incisors have a beveled edge
genus Recurvirostra
type genus of the Recurvirostridae: avocets
genus Regalecus
type genus of the Regalecidae
genus Regulus
a genus of birds of the family Sylviidae including kinglets
genus Reithrodontomys
New World harvest mice
genus Remilegia
a genus of Echeneididae
genus Reticulitermes
includes species highly destructive to structures and living trees
genus Rhagoletis
a genus of Trypetidae
genus Rhea
type genus of the Rheidae; large tall flightless South American birds similar to but smaller than ostriches
genus Rhincodon
whale sharks
genus Rhinoceros
type genus of the Rhinocerotidae
genus Rhinonicteris
orange horseshoe bats
genus Rhinoptera
a genus of Myliobatidae
genus Rhizobium
the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen
genus Rhodymenia
type genus of the family Rhodymeniaceae
genus Rhyacotriton
olympic salamanders
genus Rhynchoelaps
Australian coral snakes
genus Richmondena
genus Rickettsia
can cause typhus and Rocky Mountain spotted fever in humans
genus Riparia
a genus of Hirundinidae
genus Rissa
a genus of Laridae
genus Rivulus
genus Roccus
a genus of Serranidae
genus Rupicapra
genus Rupicola
cock of the rocks
genus Rutilus
genus Rynchops
type genus of the Rynchopidae: skimmers
genus Rypticus
a genus of fish of the family Serranidae, including soapfishes
genus Sagitta
chief genus of Chaetognatha including the largest arrowworms
genus Sagittarius
type genus of the Sagittariidae
genus Saiga
Eurasian antelopes: saigas
genus Saimiri
squirrel monkeys
genus Salamandra
type genus of the Salamandridae
genus Salmo
type genus of the Salmonidae: salmon and trout
genus Salmonella
a genus of bacteria
genus Salpa
type (perhaps sole) genus of the Salpidae
genus Salpinctes
a genus of Troglodytidae
genus Salvelinus
brook trout
genus Samia
silkworm moths
genus Sarcocystis
chief genus of the order Sarcosporidia
genus Sarcophaga
flesh flies
genus Sarcophilus
Tasmanian devil
genus Sarcoptes
type genus of the family Sarcoptidae: itch mites
genus Sarcorhamphus
usually containing only the king vulture
genus Sarda
genus Sardinia
genus Sardinops
genus Sargassum
a genus of protoctist
genus Saturnia
type genus of the Saturniidae: emperor moth
genus Sauromalus
genus Saurosuchus
early archosaurian carnivore
genus Saxicola
Old World chats
genus Sayornis
genus Scaphiopus
New World spadefoot toads
genus Scarabaeus
type genus of the Scarabaeidae
genus Scardinius
genus Scartella
a genus of Blenniidae
genus Sceliphron
mud daubers
genus Sceloglaux
a genus of Strigidae
genus Sceloporus
spiny lizards
genus Schistosoma
type genus of the family Schistosomatidae: blood flukes
genus Sciaena
type genus of the Sciaenidae: croakers
genus Sciaenops
a genus of Sciaenidae
genus Sciara
type genus of the Sciaridae: fungus gnat
genus Scincella
a reptile genus of Scincidae
genus Scincus
type genus of Scincidae
genus Sciurus
type genus of the Sciuridae; typical moderate-sized arboreal squirrels
genus Scleropages
a genus of large freshwater fishes of Australia and Borneo
genus Scolopax
type of the Scolopacidae: Old World woodcocks
genus Scolytus
type genus of the Scolytidae comprising numerous small bark beetles
genus Scomber
type genus of the Scombridae
genus Scomberesox
a genus of Scomberesocidae
genus Scomberomorus
Spanish mackerels
genus Scophthalmus
a genus of Bothidae
genus Scorpaena
type genus of the Scorpaenidae: scorpionfishes
genus Scutigera
a genus of Scutigeridae
genus Scutigerella
garden centipedes
genus Sebastodes
genus Seismosaurus
genus of large herbivorous dinosaurs of Cretaceous found in western North America
genus Seiurus
ovenbirds and water thrushes
genus Selar
big-eyed scad
genus Selenarctos
Asiatic black bears; in some classifications not a separate genus from Ursus
genus Selene
a genus of Carangidae
genus Sepia
type genus of the Sepiidae
genus Serinus
Old World finches; e.g. canaries and serins
genus Seriola
a genus of Carangidae
genus Seriphus
a genus of Sciaenidae
genus Serranus
type genus of the Serranidae: mostly small Pacific sea basses
genus Serrasalmus
genus Serratia
a genus of motile peritrichous bacteria that contain small Gram-negative rod
genus Sertularia
sessile hydroid that forms feathery colonies
genus Setophaga
a genus of Parulidae
genus Shigella
a genus of bacteria
genus Sialia
North American bluebirds
genus Sialis
type genus of the Sialidae
genus Sigmodon
American cotton rats
genus Sillago
type genus of the Sillaginidae
genus Silurus
type genus of the Siluridae: catfishes
genus Silvia
type genus of the Sylviidae: warblers
genus Simulium
type genus of the Simuliidae: blackflies
genus Sinanthropus
genus to which Peking man was formerly assigned
genus Sinornis
a genus of fossil birds
genus Siren
a genus of Sirenidae
genus Sistrurus
pygmy rattlesnakes
genus Sitophylus
a genus of Bruchidae
genus Sitotroga
grain moths
genus Sitta
type genus of the Sittidae
genus Sivapithecus
extinct primates; lower Pliocene
genus Smiledon
saber-toothed tigers
genus Solea
type genus of the Soleidae
genus Solenopsis
fire ants
genus Somateria
eider ducks
genus Sonora
ground snakes
genus Sorex
type genus of the family Soricidae: shrews
genus Spadella
marine worms resembling the sagittas but with a broader body and only one pair of lateral fins
genus Spalax
type genus of the Spalacidae
genus Spermophilus
typical ground squirrels
genus Sphecius
large solitary wasps: cicada killer
genus Sphecotheres
a genus of Old World orioles
genus Spheniscus
type genus of the Spheniscidae: jackass penguins
genus Sphenodon
coextensive with the order Rhynchocephalia: tuataras
genus Sphyraena
type and sole genus of the Sphyraenidae: barracuda
genus Sphyrapicus
a genus of Picidae
genus Sphyrna
type genus of the Sphyrnidae
genus Spilogale
a genus of Mustelidae
genus Spinus
in some classifications considered a subgenus of Carduelis: siskins and New World goldfinches
genus Spirillum
a genus of bacteria
genus Spirochaeta
the type genus of the family Spirochaetaceae; a bacterium that is flexible, undulating, and chiefly aquatic
genus Spirogyra
a genus of protoctist
genus Spirula
genus of small cephalopods with many-chambered spiral shells resembling those of the extinct belemnites
genus Spizella
chipping sparrow; field sparrow; tree sparrow
genus Spodoptera
moths whose larvae are armyworms
genus Spyeria
genus Squalus
spiny dogfishes
genus Squatina
type genus of the Squatinidae: angel sharks
genus Squilla
type genus of the family Squillidae
genus Staphylococcus
includes many pathogenic species
genus Staurikosaurus
primitive ornithischian dinosaur found in Brazil
genus Steatornis
type and sole genus of the family Steatornithidae
genus Steganopus
a genus of Phalaropidae
genus Stegosaurus
quadrupedal armored herbivore of the Jurassic and Cretaceous
genus Stenopelmatus
sand crickets
genus Stenopterygius
a reptile genus of Ichthyosauridae
genus Stenotomus
genus Stentor
trumpet-shaped protozoa with a ciliated spiral feeding funnel
genus Stercorarius
type genus of the Stercorariidae: jaegers
genus Sterna
a genus of Sterninae
genus Sternotherus
musk turtles
genus Stictomys
mountain pacas
genus Stictopelia
a genus of Columbidae
genus Stizostedion
genus Storeria
a genus of Colubridae
genus Strepera
bell magpies
genus Strepsiceros
African antelopes: kudus; bongos; nyalas; bushbucks
genus Streptococcus
a genus of bacteria
genus Streptomyces
type genus of the family Streptomycetaceae
genus Streptopelia
genus Strix
owls lacking ear tufts
genus Strombus
type genus of the family Strombidae
genus Struthio
type genus of the Struthionidae: African ostriches
genus Struthiomimus
small toothless saurischian dinosaurs; later Cretaceous period in Canada
genus Strymon
large and widely distributed genus of hairstreak butterflies
genus Sturnella
a genus of passerine birds including the meadowlarks
genus Sturnus
type genus of the Sturnidae: common starlings
genus Styracosaurus
genus of horned dinosaurs
genus Sula
type genus of the Sulidae
genus Suricata
genus Surnia
a genus of hawk-like owls
genus Sus
type genus of the Suidae
genus Sylvilagus
North American rabbits
genus Symphalangus
used in some classifications for the siamangs
genus Synagrops
a genus of Serranidae
genus Synanceja
genus Synaptomys
bog lemmings
genus Synercus
Cape buffalo
genus Syngnathus
type genus of the family Syngnathidae
genus Syrrhaptes
a genus of Pteroclididae
genus Tachyglossus
type genus of the family Tachyglossidae
genus Tachypleus
a genus of Limulidae
genus Tadarida
freetail bats
genus Tadorna
genus Taenia
type genus of the family Taeniidae: tapeworms
genus Tamandua
lesser anteater
genus Tamias
chipmunks of eastern North America
genus Tamiasciurus
American red squirrels
genus Tantilla
black-headed snakes
genus Tapirus
type genus of the Tapiridae
genus Taricha
Pacific newts
genus Tarpon
genus Tarsius
type and sole genus of the family Tarsiidae
genus Taurotragus
African antelopes: elands
genus Tautoga
genus Tautogolabrus
a genus of Labridae
genus Taxidea
in some classifications considered a genus of subfamily Melinae
genus Tayassu
type genus of the Tayassuidae
genus Tenrec
type genus of the family Tenrecidae: tenrecs
genus Terebella
type genus of Terebellidae; tube-forming marine polychete worms with many filamentous tentacles
genus Teredo
type genus of the family Teredinidae
genus Termes
type genus of the Termitidae
genus Terrapene
box turtles
genus Testudo
type genus of the Testudinidae
genus Tetragonurus
a genus of Stromateidae
genus Tetrahymena
protozoa having four membranous ciliary organelles
genus Tetrao
type genus of the Tetraonidae: capercaillies
genus Tetrapturus
a genus of Istiophoridae
genus Thalarctos
polar bears; in some classifications not a separate genus from Ursus
genus Thalassoma
a genus of Labridae
genus Thamnophilus
a genus of Formicariidae
genus Thamnophis
garter snakes
genus Thermobia
a genus of Lepismatidae
genus Thiobacillus
a genus of bacteria
genus Thomomys
western pocket gophers
genus Threskiornis
type genus of the Threskiornithidae
genus Thrips
type genus of the Thripidae
genus Thryothorus
Carolina wrens
genus Thunnus
tunas: warm-blooded fishes
genus Thylacinus
Tasmanian wolf
genus Thylogale
genus Tibicen
harvest flies
genus Tichodroma
wall creepers; in some classifications placed in family Sittidae
genus Tilapia
a genus of Cichlidae
genus Timalia
type genus of the Timaliidae
genus Tinca
genus Tinea
type genus of the Tineidae: clothes moths
genus Tineola
webbing clothes moths
genus Titanosaurus
genus of herbivorous dinosaurs flourishing during the Cretaceous in South America
genus Todus
type genus of the Todidae
genus Tolypeutes
a genus of Dasypodidae
genus Tomistoma
a genus of Malayan crocodiles
genus Tortrix
type genus of the Tortricidae
genus Toxostoma
genus Toxotes
type genus of the Toxotidae
genus Trachinotus
a genus of Carangidae
genus Trachipterus
type genus of the Trachipteridae
genus Trachodon
a reptile genus of the suborder Euronithopoda
genus Trachurus
the scads (particularly horse mackerels)
genus Tragopan
a genus of Phasianidae
genus Tragulus
type genus of the Tragulidae
genus Treponema
type genus of Treponemataceae: anaerobic spirochetes with an undulating rigid body; parasitic in warm-blooded animals
genus Triaenodon
a genus of Triakidae
genus Trialeurodes
a genus of Aleyrodidae
genus Triatoma
genus Tribolium
flour beetles
genus Tribonema
type genus of Tribonemaceae
genus Triceratops
genus of herbivorous horned dinosaurs
genus Trichecus
type and sole genus of the Trichechidae
genus Trichodesmium
a genus of blue-green algae
genus Trichoglossus
a genus of Loriinae
genus Trichomonas
flagellates parasitic in alimentary or genitourinary tracts of vertebrates and invertebrates including humans
genus Trichophaga
carpet moths
genus Trichosurus
a genus of Phalangeridae
genus Trichys
a genus of Hystricidae
genus Tridacna
type genus of the family Tridacnidae: giant clams
genus Triga
type genus of the Triglidae
genus Trimorphodon
lyre snakes
genus Trinectes
a genus of Soleidae
genus Tringa
a genus of Scolopacidae
genus Trionyx
type genus of the Trionychidae
genus Triops
type genus of the family Triopidae: small crustaceans with a small third median eye
genus Triturus
chiefly aquatic salamanders
genus Trogium
a genus of Psocidae
genus Troglodytes
type genus of the Troglodytidae
genus Trogon
type genus of the Trogonidae
genus Trombicula
type genus of the family Trombiculidae
genus Tropidoclonion
lined snakes
genus Tunga
a genus of Siphonaptera
genus Tupaia
the type genus of the Tupaia: chief genus of tree shrews
genus Tupinambis
genus Turdus
type genus of the Turdidae
genus Turnix
type genus of the Turnicidae: button quail
genus Tursiops
a genus of Delphinidae
genus Tylenchus
type genus of the family Tylenchidae
genus Tympanuchus
prairie chickens
genus Tyrannosaurus
includes a single species
genus Tyrannus
type genus of the Tyrannidae: tyrant flycatchers
genus Tyto
type and only genus of the family Tytonidae
genus Uca
fiddler crabs
genus Uintatherium
type genus of the Uintatheriidae; extinct large herbivorous ungulates somewhat resembling elephants; from the Eocene in Wyoming
genus Ulva
type genus of the family Ulvaceae; green seaweed having a thallus two cells thick: sea lettuce
genus Uma
fringe-toed lizard
genus Umbrina
genus Unio
type genus of the family Unionidae
genus Upupa
type genus of the Upupidae
genus Uria
genus Urocyon
grey foxes
genus Urophycis
genus Uropsilus
shrew moles
genus Urosaurus
a reptile genus of Iguanidae
genus Ursus
type genus of Ursidae: brown bears; in some classifications genus Ursus includes all bears
genus Uta
a reptile genus of Iguanidae
genus Utahraptor
advanced bipedal carnivorous dinosaur
genus Vanellus
Eurasian lapwings
genus Vanessa
painted beauty and red admiral
genus Varanus
type and sole extant genus of the Varanidae
genus Vedalia
genus of Australian ladybugs
genus Velociraptor
advanced carnivorous theropod
genus Venus
type genus of the family Veneridae: genus of edible clams with thick oval shells
genus Vespa
type genus of the Vespidae: various hornets and yellow jackets
genus Vespertilio
a genus of Vespertilionidae
genus Vespula
sometimes considered a subgenus of Vespa: social wasps
genus Vibrio
a genus of bacteria
genus Vicugna
a genus of Camelidae
genus Vidua
genus Vipera
type genus of the Viperidae
genus Vireo
type genus of the Vireonidae
genus Viverra
type genus of the family Viverridae
genus Viverricula
a genus of Viverridae
genus Volvox
type genus of the Volvocaceae; minute pale green flagellates occurring in tiny spherical colonies; minute flagella rotate the colony about an axis
genus Vorticella
ciliated protozoans that have a goblet-shaped body with a retractile stalk
genus Vulpes
genus Vultur
a bird that is usually restricted to the Andean condor
genus Xanthomonas
a genus of bacteria similar to Pseudomonas but producing a yellow pigment that is not soluble in water
genus Xenicus
type genus for the Xenicidae
genus Xenopus
an African clawed frog; in some classifications made the type genus of a separate family Xenopodidae
genus Xenorhyncus
East Indian and Australian storks
genus Xenosaurus
type and sole genus of Xenosauridae: slender-bodied Mexican lizards having the upper surface covered with tiny granules and tubercles
genus Xerobates
possible new genus for desert and Texas tortoises based on recent research
genus Xiphias
type genus of the Xiphiidae
genus Xylocopa
carpenter bees
genus Xyphophorus
genus Zaglossus
a genus of Tachyglossidae
genus Zalophus
sea lions
genus Zapus
type genus of the Zapodidae
genus Zenaidura
mourning doves
genus Zeus
type genus of the family Zeidae
genus Zinjanthropus
genus to which Australopithecus boisei was formerly assigned
genus Zoarces
type genus of the Zoarcidae
genus Zonotrichia
large New World sparrows
genus Zygnema
type genus of the family Zygnemataceae
birch leaf miner
type genus of the Megapodiidae
a genus including the common European kits
Genyonemus lineatus
small silvery marine food fish found off California
Geococcyx californianus
speedy largely terrestrial bird found from California and Mexico to Texas
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
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
small Old World burrowing desert rodent with long soft pale fur and hind legs adapted for leaping
germ layer
(embryology) any of the 3 layers of cells differentiated in embryos following gastrulation
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
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
a suspected cause of diarrhea in humans
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
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
gliding bacteria
bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste
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
marine protozoan having a rounded shell with spiny processes
bloodsucking African fly; transmits sleeping sickness etc.
Glossopsitta versicolor
lorikeet with a colorful coat
the luminous larva or wingless grub-like female of a firefly
(British usage) mosquito
any of various small biting flies: midges; biting midges; black flies; sand flies
very small North American and South American warblers
a vertebrate animal possessing true jaws
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
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
male turkey
Gobiesox strumosus
clingfish with typical skillet shape
Gobio gobio
small slender European freshwater fish often used as bait by anglers
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
large wading bird that resembles a curlew; has a long slightly upturned bill
golden algae
algae having the pigments chlorophyll and carotene and xanthophyll
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
a variety of green lacewing
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
web-footed long-necked typically gregarious migratory aquatic birds usually larger and less aquatic than ducks
goose down
down of the goose
any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops
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
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
young goose
small dull or metallic-colored tineoid moths whose larvae mine in plant leaves
Gracula religiosa
glossy black Asiatic starling often taught to mimic speech
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
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
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
small compact-bodied almost completely aquatic bird that builds floating nests; similar to loons but smaller and with lobate rather than webbed feet
green gland
one of a pair of glands (believed to have excretory functions) in some crustaceans near the base of the large antennae
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
blowfly with brilliant coppery green body
bottom-dwellers having large eyes with metallic green luster
greenish aphid; pest on garden and crop plants
food fish of the northern Pacific
vermiform protozoans parasitic in insects and other invertebrates
deep-sea fish with a large head and body and long tapering tail
a tall slender dog of an ancient breed noted for swiftness and keen sight; used as a racing dog
breed of medium-sized long-headed dogs with downy undercoat and harsh wiry outer coat; originated in Holland but largely developed in France
black-coated sheepdog with a heavily plumed tail
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
huge herbivorous dinosaur of the Cretaceous found in western North America
usually solitary bottom sea basses of warm seas
popular game bird having a plump body and feathered legs and feet
a soft thick wormlike larva of certain beetles and other insects
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
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
guard hair
coarse hairs that form the outer fur and protect the underfur of certain mammals
small slender African monkey having long hind limbs and tail and long hair around the face
breed of dairy cattle from the island of Guernsey
guide dog
a dog trained to guide the blind
small black or brown speckled auks of northern seas
guinea hen
female guinea fowl
primitive tropical bottom-dwelling ray with a guitar-shaped body
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
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
a saddle horse used for transportation rather than sport etc.
a horse kept for hire
an old or over-worked horse
long slender feather on the necks of e.g. turkeys and pheasants
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
related to malaria parasite and having a phase in the viscera of various birds
minute protozoans parasitic at some stage of the life cycle in blood cells of vertebrates including many pathogens
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
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
a filamentous projection or process on an organism
small butterflies having striped markings under the wings
any of several marine food fishes related to cod
a mythical bird said to breed at the time of the winter solstice in a nest floating on the sea and to have the power of calming the winds and waves
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
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
halophiles in saline environments such as the Dead Sea or salt flats
archaebacteria requiring a salt-rich environment for growth and survival
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
short-tailed Old World burrowing rodent with large cheek pouches
terminal part of the forelimb in certain vertebrates (e.g. apes or kangaroos)
handsaw fish
a soft-finned fish of the genus Alepisaurus
hanging fly
any of various mecopterous insects of the family Bittacidae
(genetics) an organism or cell having only one complete set of chromosomes
parasite in invertebrates and lower vertebrates of no known economic importance
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
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
any of various fruit bats of the genus Nyctimene distinguished by nostrils drawn out into diverging tubes