Nouns denoting animals

abalone
any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior
 
Aberdeen Angus
black hornless breed from Scotland
 
abomasum
the fourth compartment of the stomach of a ruminant; the one where digestion takes place
 
abortus
a human fetus whose weight is less than 0.5 kilogram when removed or expelled from the mother's body
 
abrocome
ratlike rodent with soft fur and large ears of the Andes
 
Abudefduf saxatilis
large blue-grey black-striped damselfish; nearly worldwide
 
Abyssinian cat
a small slender short-haired breed of African origin having brownish fur with a reddish undercoat
 
Acanthisitta chloris
small green-and-bronze bird
 
acanthocephalan
any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines
 
Acanthocybium solandri
large fast-moving predacious food and game fish; found worldwide
 
Acanthophis antarcticus
venomous Australian snake resembling an adder
 
acanthopterygian
a teleost fish with fins that are supported by sharp inflexible rays
 
Acanthoscelides obtectus
larvae live in and feed on growing or stored beans
 
Acanthurus chirurgus
surgeon fish of the West Indies
 
acarid
very small free-living arachnid that is parasitic on animals or plants; related to ticks
 
acarine
mite or tick
 
accentor
small sparrow-like songbird of mountainous regions of Eurasia
 
Accipiter cooperii
bluish-grey North American hawk having a darting flight
 
Accipiter gentilis
large hawk of Eurasia and North America used in falconry
 
Accipiter nisus
small hawk of Eurasia and northern Africa
 
Acherontia atropos
European hawkmoth with markings on the back resembling a human skull
 
Acheta assimilis
common American black cricket; attacks crops and also enters dwellings
 
Achoerodus gouldii
found around the Great Barrier Reef
 
acidophil
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
 
acridid
grasshopper with short antennae
 
Acridotheres tristis
dark brown crested bird of southeastern Asia
 
Acris crepitans
a cricket frog of eastern and central United States
 
Acris gryllus
a cricket frog of eastern United States
 
Acrocephalus schoenobaenus
small European warbler that breeds among reeds and wedges and winters in Africa
 
acrodont
an animal having teeth consolidated with the summit of the alveolar ridge without sockets
 
Actias luna
large pale-green American moth with long-tailed hind wings and a yellow crescent-shaped mark on each forewing
 
actinia
any sea anemone or related animal
 
actinomyces
soil-inhabiting saprophytes and disease-producing plant and animal parasites
 
actinomycete
any bacteria (some of which are pathogenic for humans and animals) belonging to the order Actinomycetales
 
actinomyxidian
parasites of worms
 
actinopod
protozoa having stiff rodlike radiating pseudopods
 
actinozoan
sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed
 
Actitis macularia
common North American sandpiper
 
aculea
small spiny outgrowth on the wings of certain insects
 
aculeus
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
 
adelgid
any of various insects that feed and form galls on conifers
 
Adenota vardoni
an African antelope closely related to the waterbuck
 
adenovirus
any of a group of viruses including those that in humans cause upper respiratory infections or infectious pinkeye
 
admiral
any of several brightly colored butterflies
 
adult
any mature animal
 
Aedes aegypti
mosquito that transmits yellow fever and dengue
 
Aegina
small medusa
 
Aegypius monachus
of southern Eurasia and northern Africa
 
Aegyptopithecus
extinct primate of about 38 million years ago; fossils found in Egypt
 
Aepyceros melampus
African antelope with ridged curved horns; moves with enormous leaps
 
aepyornis
huge (to 9 ft.) extinct flightless bird of Madagascar
 
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
 
aerobe
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
 
affenpinscher
European breed of small dog resembling a terrier with dark wiry hair and a tufted muzzle
 
Affirmed
thoroughbred that won the triple crown in 1978
 
Afghan hound
tall graceful breed of hound with a long silky coat; native to the Near East
 
African clawed frog
a tongueless frog native to Africa; established in the United States as result of release of laboratory and aquarium animals
 
African hunting dog
a powerful doglike mammal of southern and eastern Africa that hunts in large packs; now rare in settled area
 
African wild ass
a wild ass of Africa
 
Africander
tall large-horned humped cattle of South Africa; used for meat or draft
 
Afropavo congensis
both sexes are brightly colored
 
aftershaft
a supplementary feather (usually small) on the underside of the base of the shaft of some feathers in some birds
 
agama
small terrestrial lizard of warm regions of the Old World
 
agamid
a lizard of the family Agamidae
 
Agelaius phoeniceus
North American blackbird with scarlet patches on the wings
 
Agkistrodon contortrix
common coppery brown pit viper of upland eastern United States
 
Agkistrodon piscivorus
venomous semiaquatic snake of swamps in southern United States
 
agnathan
eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
 
Agonus cataphractus
northern Atlantic sea poacher
 
Agriocharis ocellata
wild turkey of Central America and northern South America
 
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
 
ala
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
 
albatross
large web-footed birds of the southern hemisphere having long narrow wings; noted for powerful gliding flight
 
Albula vulpes
slender silvery marine fish found in tropical mud flats and mangrove lagoons
 
Alca torda
black-and-white northern Atlantic auk having a compressed sharp-edged bill
 
Alces alces
large northern deer with enormous flattened antlers in the male; called `elk' in Europe and `moose' in North America
 
Alectis ciliaris
fish having greatly elongated front rays on dorsal and anal fins
 
Alectoris graeca
of mountainous areas of southern Europe
 
Alectoris ruffa
common western European partridge with red legs
 
Alectura lathami
black megapode of wooded regions of Australia and New Guinea
 
alga
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
 
allantois
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
 
alligator
either of two amphibious reptiles related to crocodiles but with shorter broader snouts
 
allosaur
late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus
 
Alopex lagopus
thickly-furred fox of Arctic regions; brownish in summer and white in winter
 
Alopius vulpinus
large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed
 
Alosa alosa
European shad
 
Alosa chrysocloris
shad that spawns in streams of the Mississippi drainage; very similar to Alosa sapidissima
 
alphavirus
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
 
alula
tuft of small stiff feathers on the first digit of a bird's wing
 
alula
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
 
amadavat
red Asian weaverbirds often kept as cage birds
 
amazon
mainly green tropical American parrots
 
amberfish
any of several amber to coppery fork-tailed warm-water carangid fishes
 
Ambloplites rupestris
game and food fish of upper Mississippi and Great Lakes
 
Amblyrhynchus cristatus
shore-dwelling seaweed-eating lizard of the Galapagos Islands
 
ambulacrum
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
 
ambystomid
small to moderate-sized terrestrial or semiaquatic New World salamander
 
ameba
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
 
amnion
thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
 
Amniota
higher vertebrates (reptiles, birds and mammals) possessing an amnion during development
 
amniote
any member of the Amniota
 
amphibian
cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form
 
amphibian family
any family of amphibians
 
amphibian genus
any genus of amphibians
 
amphidiploid
(genetics) an organism or cell having a diploid set of chromosomes from each parent
 
amphioxus
small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates
 
amphipod
a kind of malacostracan crustacean
 
Amphiprion percula
an anemone fish of the genus Amphiprion
 
amphiuma
aquatic eel-shaped salamander having two pairs of very small feet; of still muddy waters in the southern United States
 
Anabas testudineus
a small perch of India whose gills are modified to allow it to breathe air; has spiny pectoral fins that enable it to travel on land
 
Anabrus simplex
large dark wingless cricket-like katydid of arid parts of western United States
 
anaerobe
an organism (especially a bacterium) that does not require air or free oxygen to live
 
anapsid
primitive reptile having no opening in the temporal region of the skull; all extinct except turtles
 
Anas acuta
long-necked river duck of the Old and New Worlds having elongated central tail feathers
 
Anas clypeata
freshwater duck of the northern hemisphere having a broad flat bill
 
Anas crecca
common teal of Eurasia and North America
 
Anas discors
American teal
 
Anas penelope
freshwater duck of Eurasia and northern Africa related to mallards and teals
 
Anas platyrhynchos
wild dabbling duck from which domestic ducks are descended; widely distributed
 
Anas querquedula
small Eurasian teal
 
Anas rubripes
a dusky duck of northeastern United States and Canada
 
Anasa tristis
large black American bug that sucks sap of vines of the gourd family
 
anaspid
extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian
 
anatotitan
one of the largest and most famous duck-billed dinosaurs
 
anchovy
small herring-like plankton-eating fishes often canned whole or as paste; abundant in tropical waters worldwide
 
Ancylus fluviatilis
minute conical gastropod superficially resembling a limpet but living and feeding on freshwater plants
 
andrena
a bee that is a member of the genus Andrena
 
Aneides lugubris
yellow-spotted brown salamander of California woodlands
 
anemone fish
live associated with sea anemones
 
anemone
marine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton
 
angelfish
a butterfly fish of the genus Pomacanthus
 
anglewing
nymphalid butterfly having angular notches on the outer edges of the forewings
 
angleworm
terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers
 
Angora cat
a long-haired breed of cat similar to the Persian cat
 
Angora goat
a domestic breed of goat raised for its long silky hair which is the true mohair
 
Angora rabbit
domestic breed of rabbit with long white silky hair
 
anguid lizard
any of a small family of lizards widely distributed in warm areas; all are harmless and useful as destroyers of e.g. slugs and insects
 
Anguilla sucklandii
New Zealand eel
 
Anguillula aceti
minute eelworm that feeds on organisms that cause fermentation in e.g. vinegar
 
Anguis fragilis
small burrowing legless European lizard with tiny eyes; popularly believed to be blind
 
Anhima cornuta
screamer having a hornlike process projecting from the forehead
 
Anhinga anhinga
blackish New World snakebird of swampy regions
 
anhinga
fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill
 
ani
black tropical American cuckoo
 
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
 
animalcule
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
 
ankylosaur
having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's
 
annelid
worms with cylindrical bodies segmented both internally and externally
 
Anoa depressicornis
small buffalo of the Celebes having small straight horns
 
Anolis carolinensis
small arboreal tropical American insectivorous lizards with the ability to change skin color
 
Anomala orientalis
introduced into United States from the Orient; larvae feed on roots of sugarcane and other grasses
 
anomalops
fish having a luminous organ beneath eye; of warm waters of the western Pacific and Puerto Rico
 
Anomalopteryx oweni
the smallest moa; slender moa about the size of a large turkey
 
Anomia ephippium
thin-shelled bivalve having the right valve deeply notched
 
anopheline
any mosquito of the genus Anopheles
 
Anoplophora glabripennis
a beetle from China that has been found in the United States and is a threat to hardwood trees; lives inside the tree; no natural predators in the United States
 
Anser anser
common grey wild goose of Europe; ancestor of many domestic breeds
 
Anser cygnoides
very large wild goose of northeast Asia; interbreeds freely with the greylag
 
anseriform bird
chiefly web-footed swimming birds
 
ant bird
any of various dull-colored South American birds that feeding on ants some following army ant swarms
 
ant cow
excretes a honeylike substance eaten by ants
 
ant lion
winged insect resembling a dragonfly; the larvae (doodlebugs) dig conical pits where they wait to catch e.g. ants
 
ant lion
the larva of any of several insects
 
ant shrike
antbirds superficially resembling shrikes
 
ant thrush
a kind of antbird
 
ant
social insect living in organized colonies; characteristically the males and fertile queen have wings during breeding season; wingless sterile females are the workers
 
anteater
a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea
 
anteater
a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia
 
anteater
toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites
 
antelope
graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles; springboks; impalas; addax; gerenuks; blackbucks; dik-diks
 
antenna
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
 
anthropoid
any member of the suborder Anthropoidea including monkeys and apes and hominids
 
anthropoid ape
any tailless ape of the families Pongidae and Hylobatidae
 
Anthus pratensis
a common pipit that is brown above and white below; widely distributed in northern and central Europe and in Asia
 
Antidorcas marsupialis
a South African gazelle noted for springing lightly into the air
 
Antilocapra americana
fleet antelope-like ruminant of western North American plains with small branched horns
 
Antilope cervicapra
common Indian antelope with a dark back and spiral horns
 
antler
deciduous horn of a member of the deer family
 
Antrozous pallidus
drab yellowish big-eared bat that lives in caves
 
anuran
any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species
 
Aotus trivirgatus
nocturnal monkey of Central America and South America with large eyes and thick fur
 
Apatosaurus excelsus
huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic
 
Apatura iris
large European butterfly the male of which has wings shaded with purple
 
ape
any of various primates with short tails or no tail at all
 
aphid
any of various small plant-sucking insects
 
aphid lion
carnivorous larva of lacewing flies
 
Aphis fabae
blackish aphid that infests e.g. beans and sugar beets
 
Aphis pomi
bright green aphid; feeds on and causes curling of apple leaves
 
Aphriza virgata
sandpiper-like shorebird of Pacific coasts of North America and South America
 
Aphrophora saratogensis
feeds on pines in northern United States
 
Apis mellifera
social bee often domesticated for the honey it produces
 
Apis mellifera scutellata
a strain of bees that originated in Brazil in the 1950s as a cross between an aggressive African bee and a honeybee; retains most of the traits of the African bee; now spread as far north as Texas
 
aplacophoran
deep-water wormlike mollusks lacking calcareous plates on the body but having fine slimy spicules on the covering mantle
 
Aplodontia rufa
bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodent
 
Aplysia punctata
naked marine gastropod having a soft body with reduced internal shell and two pairs of ear-like tentacles
 
apodeme
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
 
apolemia
large siphonophore of up to 50 ft long
 
Appaloosa
a hardy breed of saddle horse developed in western North America and characteristically having a spotted rump
 
appendicularia
free-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates
 
Appenzeller
a smaller of the four Swiss breeds
 
Aptenodytes forsteri
the largest penguin; an Antarctic penguin
 
Aptenodytes patagonica
large penguin on islands bordering the Antarctic Circle
 
apteryx
nocturnal flightless bird of New Zealand having a long neck and stout legs; only surviving representative of the order Apterygiformes
 
aquatic bird
wading and swimming and diving birds of either fresh or salt water
 
aquatic mammal
whales and dolphins; manatees and dugongs; walruses; seals
 
aquatic vertebrate
animal living wholly or chiefly in or on water
 
Aquila chrysaetos
large eagle of mountainous regions of the northern hemisphere having a golden-brown head and neck
 
Aquila rapax
brownish eagle of Africa and parts of Asia
 
Arabian
a spirited graceful and intelligent riding horse native to Arabia
 
arachnid
air-breathing arthropods characterized by simple eyes and four pairs of legs
 
arame
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
 
arborvirus
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
 
arcella
an amoeba-like protozoan with a chitinous shell resembling an umbrella
 
archaebacteria
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
 
archaeornis
extinct primitive toothed bird with a long feathered tail and three free clawed digits on each wing
 
archenteron
central cavity of the gastrula; becomes the intestinal or digestive cavity
 
archiannelid
small primitive marine worm lacking external segmentation and resembling polychaete larvae
 
Archidiskidon imperator
largest known mammoth; of America
 
Archilochus colubris
a kind of hummingbird
 
architeuthis
largest mollusk known about but never seen (to 60 feet long)
 
Archosargus probatocephalus
large (up to 20 lbs) food fish of the eastern coast of the United States and Mexico
 
Archosargus rhomboidalis
sea bream of warm Atlantic waters
 
archosaur
extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts
 
Arctic ground squirrel
large ground squirrel of the North American far north
 
Arctictis bintourong
arboreal civet of Asia having a long prehensile tail and shaggy black hair
 
arctiid
stout-bodied broad-winged moth with conspicuously striped or spotted wings; larvae are hairy caterpillars
 
Arctocebus calabarensis
a kind of lemur
 
Arctocephalus philippi
a fur seal of the Pacific coast of California and southward
 
Arctonyx collaris
southeast Asian badger with a snout like a pig
 
Ardea herodius
large American heron having bluish-grey plumage
 
Ardea occidentalis
large white heron of Florida and the Florida Keys
 
Arenaria interpres
common Arctic turnstone that winters in South America and Australia
 
Arenaria-Melanocephala
common turnstone of the Pacific coast of North America
 
Arenaviridae
a family of arborviruses carried by arthropods
 
arenavirus
animal viruses belonging to the family Arenaviridae
 
argasid
tick lacking a dorsal shield and having mouth parts on the under side of the head
 
argentine
any of various small silver-scaled salmon-like marine fishes
 
argentinosaur
huge herbivorous dinosaur of Cretaceous found in Argentina
 
Argiope aurantia
a widely distributed North American garden spider
 
Argonauta argo
cephalopod mollusk of warm seas whose females have delicate papery spiral shells
 
argus
large brilliantly patterned East Indian pheasant
 
Argyrotaenia citrana
California moth whose larvae live in especially oranges
 
Arilus cristatus
large predatory North American bug that sucks the blood of other insects
 
arista
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
 
armadillo
burrowing chiefly nocturnal mammal with body covered with strong horny plates
 
armor
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
 
armyworm
larva of fungus gnat that feed on cereals and other grains; they march in large companies in regular order when the food is exhausted
 
arrowworm
any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth
 
Artemia salina
common to saline lakes
 
arthropod
invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
 
arthropod family
any of the arthropods
 
arthropod genus
a genus of arthropods
 
artiodactyl
placental mammal having hooves with an even number of functional toes on each foot
 
Arvicola amphibius
common large Eurasian vole
 
Ascaphus trui
western North American frog with a taillike copulatory organ
 
Ascaridia galli
intestinal parasite of domestic fowl
 
Ascaris lumbricoides
intestinal parasite of humans and pigs
 
ascidian
minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves
 
ascidian tadpole
free-swimming larva of ascidians; they have a tail like a tadpole that contains the notochord
 
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
 
ass
hardy and sure-footed animal smaller and with longer ears than the horse
 
assassin bug
a true bug: long-legged predacious bug living mostly on other insects; a few suck blood of mammals
 
Assault
thoroughbred that won the triple crown in 1946
 
Astrophyton muricatum
a variety of basket star
 
Astropogon stellatus
found in West Indies; lives in mantle cavity of a living conch
 
Ateles geoffroyi
arboreal monkey of tropical America with long slender legs and long prehensile tail
 
Athene noctua
small European owl
 
Atherinopsis californiensis
a relatively large silversides of the Pacific coast of North America (known to reach 18 inches in length)
 
Atlantic bonito
medium-sized tuna-like food fish of warm Atlantic and Pacific waters; less valued than tuna
 
Atlantic bottlenose dolphin
the most common dolphin of northern Atlantic and Mediterranean; often kept captive and trained to perform
 
Atlantic salmon
found in northern coastal Atlantic waters or tributaries; adults do not die after spawning
 
Atlantic spiny dogfish
destructive dogfish of the Atlantic coastal waters of America and Europe; widely used in anatomy classes
 
attack dog
a watchdog trained to attack on command
 
Atticus atlas
giant saturniid moth widespread in Asia; sometimes cultured for silk
 
auk
black-and-white short-necked web-footed diving bird of northern seas
 
auklet
any of several small auks of the northern Pacific coasts
 
Aulostomus maculatus
tropical Atlantic fish with a long snout; swims snout down
 
Auriparus flaviceps
very small yellow-headed titmouse of western North America
 
Australian 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
 
australopithecine
any of several extinct humanlike bipedal primates with relatively small brains of the genus Australopithecus; from 1 to 4 million years ago
 
Australopithecus afarensis
fossils found in Ethiopia; from 3.5 to 4 million years ago
 
Australopithecus africanus
gracile hominid of southern Africa; from about 3 million years ago
 
Australopithecus boisei
large-toothed hominid of eastern Africa; from 1 to 2 million years ago
 
Australopithecus robustus
large-toothed hominid of southern Africa; from 1.5 to 2 million years ago; formerly Paranthropus
 
Automeris io
large yellow American moth having a large eyelike spot on each hind wing; the larvae have stinging spines
 
Avahi laniger
nocturnal indris with thick grey-brown fur and a long tail
 
avocet
long-legged web-footed black-and-white shorebird with slender upward-curving bill
 
Ayrshire
hardy breed of dairy cattle from Ayr, Scotland
 
Aythya affinis
common scaup of North America; males have purplish heads
 
Aythya americana
North American diving duck with a grey-and-black body and reddish-brown head
 
Aythya ferina
heavy-bodied Old World diving duck having a grey-and-black body and reddish head
 
Aythya marila
large scaup of North America having a greenish iridescence on the head of the male
 
Aythya valisineria
North American wild duck valued for sport and food
 
B
aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
 
baa-lamb
child's word for a sheep or lamb
 
babbler
any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae
 
baboon
large terrestrial monkeys having doglike muzzles
 
baby
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
 
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
 
bacteriochlorophyll
a substance in photosensitive bacteria that is related to but different from chlorophyll of higher plants
 
bacteriophage
a virus that is parasitic (reproduces itself) in bacteria
 
bacteroid
a rodlike bacterium (especially any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants)
 
badger
sturdy carnivorous burrowing mammal with strong claws; widely distributed in the northern hemisphere
 
badger dog
small long-bodied short-legged German breed of dog having a short sleek coat and long drooping ears; suited for following game into burrows
 
bag
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
 
balancer
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
 
bandicoot
any of various agile ratlike terrestrial marsupials of Australia and adjacent islands; insectivorous and herbivorous
 
bandicoot rat
burrowing scaly-tailed rat of India and Ceylon
 
bangtail
a horse bred for racing
 
Bankia setaceae
giant shipworm of the Pacific coast of North America
 
bantam
any of various small breeds of fowl
 
barb
one of the parallel filaments projecting from the main shaft of a feather
 
barbel
slender tactile process on the jaws of a fish
 
barbet
small brightly colored stout-billed tropical bird having short weak wings
 
bark beetle
small beetle that bores tunnels in the bark and wood of trees; related to weevils
 
bark louse
any of several insects living on the bark of plants
 
barker
informal terms for dogs
 
barking deer
small Asian deer with small antlers and a cry like a bark
 
barnacle
marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces
 
barosaur
a dinosaur that could grow to be as tall as a building five stories tall
 
barracouta
a large marine food fish common on the coasts of Australia, New Zealand, and southern Africa
 
barracuda
any voracious marine fish of the genus Sphyraena having an elongated cylindrical body and large mouth with projecting lower jaw and long strong teeth
 
Bartramian sandpiper
large plover-like sandpiper of North American fields and uplands
 
basenji
small smooth-haired breed of African origin having a tightly curled tail and the inability to bark
 
basilisk
small crested arboreal lizard able to run on its hind legs; of tropical America
 
basket fish
any starfish-like animal of the genera Euryale or Astrophyton or Gorgonocephalus having slender complexly branched interlacing arms radiating from a central disc
 
bass
nontechnical name for any of numerous edible marine and freshwater spiny-finned fishes
 
Bassariscus astutus
raccoon-like omnivorous mammal of Mexico and the southwestern United States having a long bushy tail with black and white rings
 
basset
smooth-haired breed of hound with short legs and long ears
 
bat
nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate
 
batfish
bottom-dweller of warm western Atlantic coastal waters having a flattened scaleless body that crawls about on fleshy pectoral and pelvic fins
 
bay
a horse of a moderate reddish-brown color
 
beach flea
small amphipod crustaceans that hop like fleas; common on ocean beaches
 
beagle
a small short-legged smooth-coated breed of hound
 
beak
beaklike mouth of animals other than birds (e.g., turtles)
 
beak
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
 
bear
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
 
beard
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
 
beard
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
 
beaver
large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges
 
beaver rat
amphibious rat of Australia and New Guinea
 
Bedlington terrier
a light terrier groomed to resemble a lamb
 
bee
any of numerous hairy-bodied insects including social and solitary species
 
bee beetle
European beetle; infests beehives
 
bee eater
colorful chiefly tropical Old World bird having a strong graceful flight; feeds on especially bees
 
bee fly
hairy nectar-eating fly that resembles a bee; larvae are parasitic on larvae of bees and related insects
 
bee killer
swift predatory fly having a strong body like a bee with the proboscis hardened for sucking juices of other insects captured on the wing
 
beef
cattle that are reared for their meat
 
beefalo
hardy breed of cattle resulting from crossing domestic cattle with the American buffalo; yields leaner beef than conventional breeds
 
beetle
insect having biting mouthparts and front wings modified to form horny covers overlying the membranous rear wings
 
belemnite
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
 
bellbird
any of several tropical American birds of the genus Procnias having a bell-like call
 
bellows fish
small bottom-dwelling fish of warm seas having a compressed body and a long snout with a toothless mouth
 
bellwether
sheep that leads the herd often wearing a bell
 
belly
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
 
beroe
delicately iridescent thimble-shaped ctenophores
 
bettong
short-nosed rat kangaroo
 
Bibos frontalis
ox of southeast Asia sometimes considered a domesticated breed of the gaur
 
Bibos gaurus
wild ox of mountainous areas of eastern India
 
biddy
young bird especially of domestic fowl
 
biddy
adult female chicken
 
big bedbug
large bloodsucking bug
 
big cat
any of several large cats typically able to roar and living in the wild
 
big game
large animals that are hunted for sport
 
bigeye
red fishes of American coastal tropical waters having very large eyes and rough scales
 
billfish
giant warm-water game fish having a prolonged and rounded toothless upper jaw
 
billfish
elongate European surface-dwelling predacious fishes with long toothed jaws; abundant in coastal waters
 
billy
male goat
 
biped
an animal with two feet
 
biplane flying fish
having both pectoral and pelvic fins enlarged
 
bird
warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings
 
bird dog
a gun dog trained to locate or retrieve birds
 
bird 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
 
bison
any of several large humped bovids having shaggy manes and large heads and short horns
 
Bison bonasus
European bison having a smaller and higher head than the North American bison
 
bitch
female of any member of the dog family
 
biting midge
minute two-winged insect that sucks the blood of mammals and birds and other insects
 
Bitis arietans
large African viper that inflates its body when alarmed
 
Bitis gabonica
large heavy-bodied brilliantly marked and extremely venomous west African viper
 
bittern
relatively small compact tawny-brown heron with nocturnal habits and a booming cry; found in marshes
 
bivalve
marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together
 
black bass
widely distributed and highly prized American freshwater game fishes (sunfish family)
 
black carpet beetle
a carpet beetle that is solid black in color
 
black cock
male black grouse
 
black fly
small blackish stout-bodied biting fly having aquatic larvae; sucks the blood of birds as well as humans and other mammals
 
black fox
red fox in the color phase when its pelt is mostly black
 
black grouse
grouse of which the male is bluish-black
 
black sheep
sheep with a black coat
 
black squirrel
fox squirrel or grey squirrel in the black color phase
 
black-and-tan coonhound
American breed of large powerful hound dogs used for hunting raccoons and other game
 
black-headed snake
small secretive ground-living snake; found from central United States to Argentina
 
Blackburnian warbler
black-and-white North American wood warbler having an orange-and-black head and throat
 
blackfish
female salmon that has recently spawned
 
bladder worm
encysted saclike larva of the tapeworm
 
blanquillo
important marine food fishes
 
Blarina brevicauda
North American shrew with tail less than half its body length
 
blastocele
the fluid-filled cavity inside a blastula
 
blastocyst
the blastula of a placental mammal in which some differentiation of cells has occurred
 
blastoderm
a layer of cells on the inside of the blastula
 
blastomere
any cell resulting from cleavage of a fertilized egg
 
blastopore
the opening into the archenteron
 
blastosphere
early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
 
Blatta orientalis
dark brown cockroach originally from orient now nearly cosmopolitan in distribution
 
Blattella germanica
small light-brown cockroach brought to United States from Europe; a common household pest
 
Blenheim spaniel
red-and-white variety of English toy spaniel
 
blennioid
elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins
 
Blennius pholis
European scaleless blenny
 
blenny
small usually scaleless fishes with comb-like teeth living about rocky shores; are territorial and live in holes between rocks
 
blind snake
wormlike burrowing snake of warm regions having vestigial eyes
 
blindworm
any of the small slender limbless burrowing wormlike amphibians of the order Gymnophiona; inhabit moist soil in tropical regions
 
Blissus leucopterus
small black-and-white insect that feeds on cereal grasses
 
blister beetle
beetle that produces a secretion that blisters the skin
 
blood clam
red-blooded clam
 
blood fluke
flatworms parasitic in the blood vessels of mammals
 
bloodhound
a breed of large powerful hound of European origin having very acute smell and used in tracking
 
bloodsucker
carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end
 
bloodworm
a segmented marine worm with bright red body; often used for bait
 
blow fly
large usually hairy metallic blue or green fly; lays eggs in carrion or dung or wounds
 
blower
large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales; dolphins; porpoises; narwhals
 
blowfish
any of numerous marine fishes whose elongated spiny body can inflate itself with water or air to form a globe; several species contain a potent nerve poison; closely related to spiny puffers
 
blue
any of numerous small butterflies of the family Lycaenidae
 
blue cat
a large catfish of the Mississippi valley
 
blue fox
a variety of Arctic fox having a pale grey winter coat
 
blue point Siamese
Siamese cat having a bluish cream-colored body and dark grey points
 
blue point
small edible oyster typically from the southern shore of Long Island
 
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
 
bluebill
diving ducks of North America having a bluish-grey bill
 
bluebird
blue North American songbird
 
bluebird
fruit-eating mostly brilliant blue songbird of the East Indies
 
bluetick
a very fast American hound; white mottled with bluish grey
 
boa
any of several chiefly tropical constrictors with vestigial hind limbs
 
boar
an uncastrated male hog
 
boarfish
fish with large eyes and long snouts
 
boarhound
large hound used in hunting wild boars
 
boat bug
carnivorous aquatic bug having paddle-like hind legs
 
boatswain bird
mostly white web-footed tropical seabird often found far from land
 
bob
a short or shortened tail of certain animals
 
bobwhite
a popular North American game bird; named for its call
 
bollworm
any of various moth caterpillars that destroy cotton bolls
 
bombardier beetle
beetle that ejects audibly a pungent vapor when disturbed
 
Bombina bombina
toad of central and eastern Europe having red or orange patches mixed with black on its underside
 
bombycid
moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk
 
Bombycilla
waxwings
 
Bombycilla cedrorun
widely distributed over temperate North America
 
Bombycilla garrulus
large waxwing of northern North America; similar to but larger than the cedar waxwing
 
Bombyx mori
stocky creamy-white Asiatic moth found almost entirely under human care; the source of most of the silk commerce
 
Bonasa umbellus
valued as a game bird in eastern United States and Canada
 
bone-headed dinosaur
bipedal herbivorous dinosaurs with bony crowns
 
bonito
any of various scombroid fishes intermediate in size and characteristics between mackerels and tunas
 
bonxie
gull-like jaeger of northern seas
 
bony fish
any fish of the class Osteichthyes
 
booby
small tropical gannet having a bright bill or bright feet or both
 
Border collie
developed in the area between Scotland and England usually having a black coat with white on the head and tip of tail used for herding both sheep and cattle
 
Border terrier
small rough-coated terrier of British origin
 
borer
any of various insects or larvae or mollusks that bore into wood
 
borrelia
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
 
bot
botfly larva; typically develops inside the body of a horse or sheep or human
 
Botaurus lentiginosus
a kind of bittern
 
Botaurus stellaris
a kind of bittern
 
botfly
stout-bodied hairy dipterous fly whose larvae are parasites on humans and other mammals
 
Bothrops atrops
large extremely venomous pit viper of Central America and South America
 
bottlenose
any of several dolphins with rounded forehead and well-developed beak; chiefly of northern Atlantic and Mediterranean
 
bottom fish
fish that live on the sea bottom (particularly the commercially important gadoid fish like cod and haddock, or flatfish like flounder)
 
bottom lurkers
a fish that lurks on the bottom of a body of water
 
bottom-dweller
a fish that lives and feeds on the bottom of a body of water
 
bottom-feeder
a scavenger that feeds low on the food chain
 
Bouviers des Flandres
rough-coated breed used originally in Belgium for herding and guarding cattle
 
bovid
hollow-horned ruminants
 
bovine
any of various members of the genus Bos
 
bowerbird
any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females
 
box tortoise
chiefly terrestrial turtle of North America; shell can be closed tightly
 
boxer
a breed of stocky medium-sized short-haired dog with a brindled coat and square-jawed muzzle developed in Germany
 
boxfish
any of numerous small tropical fishes having body and head encased in bony plates
 
Brabancon griffon
a variety of Brussels griffon having a short smooth coat
 
brachiopod
marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide
 
brachyuran
typical crabs
 
bracketed blenny
small eellike fishes common in shallow waters of the northern Atlantic
 
Bradypus tridactylus
a sloth that has three long claws on each forefoot and each hindfoot
 
brain coral
massive reef-building coral having a convoluted and furrowed surface
 
Brama raii
deep-bodied sooty-black pelagic spiny-finned fish of the northern Atlantic and northern Pacific; valued for food
 
branchia
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
 
branchiopod
aquatic crustaceans typically having a carapace and many pairs of leaflike appendages used for swimming as well as respiration and feeding
 
brant
small dark geese that breed in the north and migrate southward
 
Branta bernicla
the best known variety of brant goose
 
Branta canadensis
common greyish-brown wild goose of North America with a loud, trumpeting call
 
Branta leucopsis
European goose smaller than the brant; breeds in the far north
 
Brazilian trumpeter
trumpeter of Brazil and Guiana; often kept to protect poultry in Brazil
 
bream
any of various usually edible freshwater percoid fishes having compressed bodies and shiny scales; especially (but not exclusively) of the genus Lepomis
 
bream
any of numerous marine percoid fishes especially (but not exclusively) of the family Sparidae
 
breast
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
 
briard
old French breed of large strong usually black dogs having a long tail and long wavy and slightly stiff coat
 
bristle
a stiff hair
 
bristletail
small wingless insect with a long bristlelike tail
 
brit
the young of a herring or sprat or similar fish
 
brit
minute crustaceans forming food for right whales
 
Brittany spaniel
tall active short-tailed French breed of bird dog having a usually smooth orange- or liver-and-white coat
 
brittle star
an animal resembling a starfish with fragile whiplike arms radiating from a small central disc
 
broadbill
small birds of the Old World tropics having bright plumage and short wide bills
 
broadtail
hardy coarse-haired sheep of central Asia; lambs are valued for their soft curly black fur
 
brocket
male red deer in its second year
 
brocket
small South American deer with unbranched antlers
 
bronc
an unbroken or imperfectly broken mustang
 
brood bitch
a bitch used for breeding
 
brood hen
a domestic hen ready to brood
 
broodmare
a female horse used for breeding
 
Brosme brosme
large edible marine fish of northern coastal waters; related to cod
 
brotula
deep-sea fishes
 
brown 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
 
Brucella
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
 
bruin
a conventional name for a bear used in tales following usage in the old epic `Reynard the Fox'
 
brush
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
 
bryozoan
sessile aquatic animal forming mossy colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by budding
 
Bubalus bubalis
an Asian buffalo that is often domesticated for use as a draft animal
 
Bubalus mindorensis
small buffalo of Mindoro in the Philippines
 
bubble shell
marine gastropod mollusk having a very small thin shell
 
Bubo virginianus
brown North American horned owl
 
Bubulcus ibis
small white egret widely distributed in warm regions often found around grazing animals
 
Bucephala islandica
North American goldeneye diving duck
 
Bucephela albeola
small North American diving duck; males have bushy head plumage
 
Bucephela clangula
large-headed swift-flying diving duck of Arctic regions
 
buck
mature male of various mammals (especially deer or antelope)
 
bucking bronco
a wild horse that is vicious and difficult or impossible to break in
 
buckskin
horse of a light yellowish dun color with dark mane and tail
 
Budorcas taxicolor
large heavily built goat antelope of eastern Himalayan area
 
buffalo fish
any of several large suckers of the Mississippi valley
 
bufo
any toad of the genus Bufo
 
Bufo americanus
common toad of America
 
Bufo boreas
of a great variety of habitats from southern Alaska to Baja California west of the Rockies
 
Bufo calamita
common brownish-yellow short-legged toad of western Europe; runs rather than hops
 
Bufo marinus
largest known toad species; native to Central America; valuable destroyer of insect pests
 
Bufo microscaphus
a uniformly warty stocky toad of washes and streams of semiarid southwestern United States
 
Bufo speciosus
nocturnal burrowing toad of mesquite woodland and prairies of the United States southwest
 
bug
general term for any insect or similar creeping or crawling invertebrate
 
bug
a minute life form (especially a disease-causing bacterium); the term is not in technical use
 
bug
insects with sucking mouthparts and forewings thickened and leathery at the base; usually show incomplete metamorphosis
 
bulbul
nightingale spoken of in Persian poetry
 
bull
mature male of various mammals of which the female is called `cow'; e.g. whales or elephants or especially cattle
 
bull
uncastrated adult male of domestic cattle
 
bull mastiff
large powerful breed developed by crossing the bulldog and the mastiff
 
bull snake
any of several large harmless rodent-eating North American burrowing snakes
 
bull terrier
a powerful short-haired terrier originated in England by crossing the bulldog with terriers
 
bullbat
mainly nocturnal North American goatsucker
 
bulldog ant
any of the large fierce Australian ants of the genus Myrmecia
 
bullhead
freshwater sculpin with a large flattened bony-plated head with hornlike spines
 
bullhead
any of several common freshwater catfishes of the United States
 
bullock
young bull
 
bullock
castrated bull
 
bumblebee
robust hairy social bee of temperate regions
 
Bungarus fasciatus
sluggish krait banded with black and yellow
 
bunny
(usually informal) especially a young rabbit
 
bunting
any of numerous seed-eating songbirds of Europe or North America
 
Bunyaviridae
a large family of arboviruses that affect a wide range of hosts (mainly vertebrates and arthropods)
 
bunyavirus
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
 
burrfish
any of several fishes having rigid flattened spines
 
burro
small donkey used as a pack animal
 
bush baby
agile long-tailed nocturnal African lemur with dense woolly fur and large eyes and ears
 
bush shrike
an African shrike
 
bush tit
active grey titmice of western North America
 
bustard
large heavy-bodied chiefly terrestrial game bird capable of powerful swift flight; classified with wading birds but frequents grassy steppes
 
bustard quail
small quail-like terrestrial bird of southern Eurasia and northern Africa that lacks a hind toe; classified with wading birds but inhabits grassy plains
 
butcherbird
large carnivorous Australian bird with the shrike-like habit of impaling prey on thorns
 
butcherbird
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
 
buteonine
any hawk of the genus Buteo
 
butterfish
small marine fish with a short compressed body and feeble spines
 
butterfly
diurnal insect typically having a slender body with knobbed antennae and broad colorful wings
 
butterfly fish
small usually brilliantly colored tropical marine fishes having narrow deep bodies with large broad fins; found worldwide
 
butterfly ray
a stingray with a short tail and a broad fin
 
butterflyfish
tropical fish with huge fanlike pectoral fins for underwater gliding; unrelated to searobins
 
bycatch
unwanted marine creatures that are caught in the nets while fishing for another species
 
Cabassous unicinctus
naked-tailed armadillo of tropical South America
 
cabbage butterfly
white butterfly whose larvae (cabbageworms) feed on cabbage
 
cacique
black-and-red or black-and-yellow orioles of the American tropics
 
cackler
a hen that has just laid an egg and emits a shrill squawk
 
cactus wren
large harsh-voiced American wren of arid regions of the United States southwest and Mexico
 
caddice fly
small moth-like insect having two pairs of hairy membranous wings and aquatic larvae
 
caddisworm
larva of the caddis fly; constructs a case of silk covered with sand or plant debris
 
Cadra cautella
a moth whose larvae feed on and mat together with webbing various stored products of vegetable origin
 
Cadra figulilella
moth whose larvae attack dried fruits and cereal products
 
caiman lizard
crocodile-like lizard of South America having powerful jaws for crushing snails and mussels
 
Caiman sclerops
caiman with bony ridges about the eyes; found from southern Mexico to Argentina
 
caiman
a semiaquatic reptile of Central and South America that resembles an alligator but has a more heavily armored belly
 
Cairina moschata
large crested wild duck of Central America and South America; widely domesticated
 
cairn
small rough-haired breed of terrier from Scotland
 
Calamus penna
from Florida and Bahamas to Brazil
 
calamus
the hollow spine of a feather
 
calf
young of domestic cattle
 
calf
young of various large placental mammals e.g. whale or giraffe or elephant or buffalo
 
calico cat
a cat having black and cream-colored and yellowish markings
 
caliculus
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
 
calosoma
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
 
camel
cud-chewing mammal used as a draft or saddle animal in desert regions
 
Camelus bactrianus
two-humped camel of the cold deserts of central Asia
 
Camelus dromedarius
one-humped camel of the hot deserts of northern Africa and southwestern Asia
 
Campephilus principalis
large black-and-white woodpecker of southern United States and Cuba having an ivory bill; nearly extinct
 
Canachites canadensis
North American grouse that feeds on evergreen buds and needles
 
canary
any of several small Old World finches
 
Cancer borealis
large red deep-water crab of the eastern coast of North America
 
Cancer irroratus
crab of eastern coast of North America
 
Cancer magister
small edible crab of Pacific coast of North America
 
canid
any of various fissiped mammals with nonretractile claws and typically long muzzles
 
Canis aureus
Old World nocturnal canine mammal closely related to the dog; smaller than a wolf; sometimes hunts in a pack but usually singly or as a member of a pair
 
Canis dingo
wolflike yellowish-brown wild dog of Australia
 
Canis familiaris
a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds
 
Canis latrans
small wolf native to western North America
 
Canis lupus
a wolf with a brindled grey coat living in forested northern regions of North America
 
Canis lupus tundrarum
wolf of Arctic North America having white fur and a black-tipped tail
 
Canis rufus
reddish-grey wolf of southwestern North America
 
cankerworm
green caterpillar of a geometrid moth; pest of various fruit and shade trees
 
cannon bone
greatly developed metatarsal or metacarpal bone in the shank or cannon part of the leg in hoofed mammals
 
cannon
lower part of the leg extending from the hock to the fetlock in hoofed mammals
 
capelan
very small northern fish; forage for sea birds and marine mammals and other fishes
 
capon
castrated male chicken
 
Capra aegagrus
wild goat of Iran and adjacent regions
 
Capra falconeri
large Himalayan goat with large spiraled horns
 
Capra hircus
any of various breeds of goat raised for milk or meat or wool
 
Capra ibex
wild goat of mountain areas of Eurasia and northern Africa having large recurved horns
 
Capreolus capreolus
small graceful deer of Eurasian woodlands having small forked antlers
 
caprimulgid
mainly crepuscular or nocturnal nonpasserine birds with mottled greyish-brown plumage and large eyes; feed on insects
 
caprimulgiform bird
long-winged nonpasserine birds
 
Caprimulgus carolinensis
large whippoorwill-like bird of the southern United States
 
Caprimulgus europaeus
Old World goatsucker
 
Caprimulgus vociferus
American nocturnal goatsucker with grey-and-white plumage
 
caprine animal
any of numerous agile ruminants related to sheep but having a beard and straight horns
 
Capros aper
fish with a projecting snout
 
capsid
the outer covering of protein surrounding the nucleic acid of a virus
 
capsid
a variety of leaf bug
 
carabao
water buffalo of the Philippines
 
carabid beetle
predacious shining black or metallic terrestrial beetle that destroys many injurious insects
 
caracara
any of various long-legged carrion-eating hawks of South America and Central America
 
carangid
a percoid fish of the family Carangidae
 
Caranx bartholomaei
fish of western Atlantic and Gulf of Mexico
 
Caranx crysos
fish of western Atlantic: Cape Cod to Brazil
 
Caranx hippos
fish of western Atlantic and Gulf of Mexico
 
carapace
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
 
carcase
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
 
cardinalfish
small red fishes of coral reefs and inshore tropical waters
 
Cardium edule
common edible European cockle
 
Carduelis cannabina
small Old World finch whose male has a red breast and forehead
 
Carduelis carduelis
small European finch having a crimson face and yellow-and-black wings
 
Carduelis cucullata
South American species of scarlet finch with black head and wings and tail
 
Carduelis flammea
small siskin-like finch with a red crown and a rosy breast and rump
 
Carduelis hornemanni
small siskin-like finch with a red crown
 
Carduelis spinus
small yellow-and-black Eurasian finch with a sharp beak
 
Caretta caretta
very large carnivorous sea turtle; wide-ranging in warm open seas
 
Cariama cristata
Brazilian Cariama; sole representative of the genus Cariama
 
caribe
small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals
 
carinate
birds having keeled breastbones for attachment of flight muscles
 
Carniolan bee
greyish highly productive European honeybee that has a quiet disposition
 
carnivore
any animal that feeds on flesh
 
carnivore
a terrestrial or aquatic flesh-eating mammal
 
carnivorous bat
typically having large ears and feeding primarily on insects; worldwide in distribution
 
carnosaur
large carnivorous bipedal dinosaur having huge claws
 
carp
any of various freshwater fish of the family Cyprinidae
 
carpenter ant
ant that nests in decaying wood in which it bores tunnels for depositing eggs
 
carpenter bee
large solitary bee that lays eggs in tunnels bored into wood or plant stems
 
carpet beetle
small beetle whose larvae are household pests feeding on woolen fabrics
 
Carphophis amoenus
small reddish wormlike snake of eastern United States
 
Carpocapsa pomonella
a small grey moth whose larvae live in apples and English walnuts
 
Carpodacus mexicanus
small finch originally of the western United States and Mexico
 
Carpodacus purpureus
North American finch having a raspberry-red head and breast and rump
 
carriage dog
a large breed having a smooth white coat with black or brown spots; originated in Dalmatia
 
carrier
(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
 
carrion
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
 
caseworm
insect larva that constructs a protective case around its body
 
Cashmere goat
Himalayan goat having a silky undercoat highly prized as cashmere wool
 
Casmerodius albus
widely distributed Old World white egret
 
cassowary
large black flightless bird of Australia and New Guinea having a horny head crest
 
Castor canadensis
a variety of beaver found in almost all areas of North America except Florida
 
cat shark
small bottom-dwelling sharks with cat-like eyes; found along continental slopes
 
cat
feline mammal usually having thick soft fur and no ability to roar: domestic cats; wildcats
 
catamount
short-tailed wildcats with usually tufted ears; valued for their fur
 
caterpillar
a wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth
 
catfish
any of numerous mostly freshwater bottom-living fishes of Eurasia and North America with barbels like whiskers around the mouth
 
catfish
large ferocious northern deep-sea food fishes with strong teeth and no pelvic fins
 
Catharacta skua
large brown skua of the northern Atlantic
 
Cathartes aura
a New World vulture that is common in South America and Central America and the southern United States
 
Catocala nupta
moth having dull forewings and red-marked hind wings
 
Catoptrophorus semipalmatus
large North American shorebird of eastern and Gulf Coasts
 
catostomid
a cypriniform fish of the family Catostomidae
 
caudal appendage
tail especially of a mammal posterior to and above the anus
 
caudal fin
the tail of fishes and some other aquatic vertebrates
 
caudate
amphibians that resemble lizards
 
cavalry horse
horse trained for battle
 
Cavia cobaya
stout-bodied nearly tailless domesticated cavy; often kept as a pet and widely used in research
 
Cavia porcellus
South American cavy; possibly ancestral to the domestic guinea pig
 
cavy
short-tailed rough-haired South American rodent
 
Cebuella pygmaea
the smallest monkey; of tropical forests of the Amazon
 
Cebus capucinus
monkey of Central America and South America having thick hair on the head that resembles a monk's cowl
 
centipede
chiefly nocturnal predacious arthropod having a flattened body of 15 to 173 segments each with a pair of legs, the foremost pair being modified as prehensors
 
centrarchid
small carnivorous freshwater percoid fishes of North America usually having a laterally compressed body and metallic luster: crappies; black bass; bluegills; pumpkinseed
 
Centrocercus urophasianus
large grouse of sagebrush regions of North America
 
Centropistes striata
bluish black-striped sea bass of the Atlantic coast of the United States
 
Centropristis philadelphica
a kind of sea bass
 
Centropus phasianinus
Australian bird with a tail like a pheasant
 
Centropus sinensis
common coucal of India and China
 
cephalaspid
extinct jawless fish of the Devonian with armored head
 
cephalochordate
fish-like animals having a notochord rather than a true spinal column
 
cephalopod
marine mollusk characterized by well-developed head and eyes and sucker-bearing tentacles
 
Cephalopterus ornatus
black tropical American bird having a large overhanging crest and long feathered wattle
 
Cepphus columba
northern Pacific guillemot
 
Cepphus grylle
northern Atlantic guillemot
 
Cerapteryx graminis
European moth with white antler-like markings on the forewings; the larvae damage pastures and grasslands
 
ceras
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
 
ceratodus
extinct lungfish
 
ceratopsian
any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia
 
ceratosaur
primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America
 
Ceratotherium simum
large light-grey African rhinoceros having two horns; endangered; sometimes placed in genus Diceros
 
cercaria
tadpole-shaped parasitic larva of a trematode worm; tail disappears in adult stage
 
Cercopithecus aethiops
white and olive green East African monkey with long white tufts of hair beside the face
 
Cercopithecus aethiops pygerythrus
South African monkey with black face and hands
 
Cercopithecus aethiops sabaeus
common savannah monkey with greenish-grey back and yellow tail
 
Cercopithecus talapoin
smallest guenon monkey; of swampy central and west African forests
 
cere
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
 
cervid
distinguished from Bovidae by the male's having solid deciduous antlers
 
Cervus elaphus
common deer of temperate Europe and Asia
 
Cervus elaphus canadensis
large North American deer with large much-branched antlers in the male
 
Cervus unicolor
a deer of southern Asia with antlers that have three tines
 
Ceryle alcyon
greyish-blue North American kingfisher with a chestnut band on its chest
 
cestode
ribbonlike flatworms that are parasitic in the intestines of humans and other vertebrates
 
Cetonia aurata
a common metallic green European beetle: larvae feed on plant roots and adults on leaves and flowers of e.g. roses
 
Cetorhinus maximus
large harmless plankton-eating northern shark; often swims slowly or floats at the sea surface
 
chachalaca
slender arboreal guan resembling a wild turkey; native to Central America and Mexico; highly regarded as game birds
 
Chaenopsis ocellata
found from Florida to Cuba
 
chaeta
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
 
chaetodon
any fish of the genus Chaetodon
 
chalaza
one of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell
 
chalcid
any of various tiny insects whose larvae are parasites on eggs and larvae of other insects; many are beneficial in destroying injurious insects
 
chalcis fly
a variety of chalcid fly
 
Chamaea fasciata
small brown bird of California resembling a wren
 
Chamaeleo chamaeleon
a chameleon found in Africa
 
Chamaeleo oweni
a kind of chameleon
 
chamaeleon
lizard of Africa and Madagascar able to change skin color and having a projectile tongue
 
chambered nautilus
cephalopod of the Indian and Pacific oceans having a spiral shell with pale pearly partitions
 
chameleon tree frog
a form of tree toad
 
char
any of several small trout-like fish of the genus Salvelinus
 
characid
any freshwater fish of the family Characinidae
 
Charadrius melodus
small plover of eastern North America
 
Charadrius morinellus
rare plover of upland areas of Eurasia
 
Charadrius vociferus
American plover of inland waters and fields having a distinctive cry
 
charger
formerly a strong swift horse ridden into battle
 
Charina bottae
boa of grasslands and woodlands of western North America; looks and feels like rubber with tail and head of similar shape
 
Charolais
large white or cream-colored breed from France
 
Charronia flavigula
large yellow and black marten of southern China and Burma
 
Chateura pelagica
American swift that nests in e.g. unused chimneys
 
chatterer
passerine bird of New World tropics
 
Chauna torquata
largest crested screamer; native to southern Brazil and Argentina
 
chela
a grasping structure on the limb of a crustacean or other arthropods
 
chelicera
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
 
chelonian
a reptile of the order Chelonia
 
Chelydra serpentina
large-headed turtle with powerful hooked jaws found in or near water; prone to bite
 
Chen caerulescens
North American wild goose having dark plumage in summer but white in winter
 
cherrystone
a half-grown quahog
 
Chesapeake Bay retriever
American breed having a short thick oily coat ranging from brown to light tan
 
chestnut
a dark golden-brown or reddish-brown horse
 
chestnut
a small horny callus on the inner surface of a horse's leg
 
Cheviot
hardy hornless sheep of the Cheviot Hills noted for its short thick wool
 
chevrotain
very small hornless deer-like ruminant of tropical Asia and west Africa
 
Chiacoan peccary
a recently discovered large wild pig of Paraguay
 
chickadee
any of various small grey-and-black songbirds of North America
 
chicken hawk
nontechnical term for any hawks said to prey on poultry
 
chicken snake
large North American snake
 
chigger
larval mite that sucks the blood of vertebrates including human beings causing intense irritation
 
Chihuahua
an old breed of tiny short-haired dog with protruding eyes from Mexico held to antedate Aztec civilization
 
Chihuahuan spotted whiptail
having longitudinal stripes overlaid with light spots; upland lizard of United States southwest and Mexico
 
Chilomeniscus cinctus
a sand snake of southwestern United States; lives in fine to coarse sand or loamy soil in which it `swims'; banding resembles that of coral snakes
 
chimaera
a deep-sea fish with a tapering body, smooth skin, and long threadlike tail
 
Chimaera monstrosa
large European chimaera
 
Chinchilla laniger
small rodent with soft pearly grey fur; native to the Andes but bred in captivity for fur
 
chine
backbone of an animal
 
Chinese paddlefish
fish of larger rivers of China similar to the Mississippi paddlefish
 
chipmunk
a burrowing ground squirrel of western America and Asia; has cheek pouches and a light and dark stripe running down the body
 
chiton
primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates
 
Chlamydera nuchalis
large bowerbird of northern Australia
 
chlamydia
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
 
chlorella
any alga of the genus Chlorella
 
chlorofucin
the chlorophyll present in brown algae, diatoms, and flagellates
 
Chlorophoneus nigrifrons
a kind of bush shrike
 
chlorophyl
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
 
chlorophyte
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
 
choanocyte
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
 
chordamesoderm
the area of mesoderm that forms the notochord
 
chordate
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
 
chorion
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
 
chough
a European corvine bird of small or medium size with red legs and glossy black plumage
 
chow
breed of medium-sized dogs with a thick coat and fluffy curled tails and distinctive blue-black tongues; believed to have originated in northern China
 
Chronoperates paradoxus
shrew-sized protomammal from the Alberta region of Canada; from about 55 million years ago (much more recent than other mammal-like reptiles)
 
chrysalis
pupa of a moth or butterfly enclosed in a cocoon
 
Chrysaora quinquecirrha
a type of jellyfish
 
Chrysemys picta
freshwater turtles having bright yellow and red markings; common in the eastern United States
 
Chrysolophus pictus
brightly colored crested pheasant of mountains of western and central Asia
 
chrysomelid
brightly colored beetle that feeds on plant leaves; larvae infest roots and stems
 
Chrysophrys auratus
Australian food fish having a pinkish body with blue spots
 
Chrysophrys australis
important dark-colored edible food and game fish of Australia
 
chrysopid
pale green unpleasant-smelling lacewing fly having carnivorous larvae
 
Chunga burmeisteri
Argentinian Cariama
 
church mouse
a fictional mouse created by Lewis Carroll
 
cicada
stout-bodied insect with large membranous wings; male has drum-like organs for producing a high-pitched drone
 
cichlid
freshwater fishes of tropical America and Africa and Asia similar to American sunfishes; some are food fishes; many small ones are popular in aquariums
 
Ciconia ciconia
the common stork of Europe; white with black wing feathers and a red bill
 
Ciconia nigra
Old World stork that is glossy black above and white below
 
ciliate
a protozoan with a microscopic appendage extending from the surface of the cell
 
cilium
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
 
cirrus
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
 
Citation
thoroughbred that won the triple crown in 1948
 
Citellus citellus
rather large central Eurasian ground squirrel
 
Citellus lateralis
common black-striped reddish-brown ground squirrel of western North America; resembles a large chipmunk
 
Citellus leucurus
small ground squirrel of western United States
 
Citellus variegatus
large grey ground squirrel of rocky areas of the southwestern United States
 
Citharichthys cornutus
a whiff found in waters from the Bahamas and northern Gulf of Mexico to Brazil
 
civet
cat-like mammal typically secreting musk used in perfumes
 
Cladorhyncus leucocephalum
web-footed Australian stilt with reddish-brown pectoral markings
 
clam
burrowing marine mollusk living on sand or mud; the shell closes with viselike firmness
 
clamshell
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
tapeworms
 
class Channidae
snakeheads
 
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
earthworms
 
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
 
claw
sharp curved horny process on the toe of a bird or some mammals or reptiles
 
claw
a bird's foot
 
cleg
large swift fly the female of which sucks blood of various animals
 
clerid
predacious on other insects; usually brightly colored or metallic
 
click beetle
able to right itself when on its back by flipping into the air with a clicking sound
 
climbing salamander
any of several North American salamanders adapted for climbing with well-developed limbs and long somewhat squared-off toes
 
clingfish
very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.
 
clinid
mostly small blennioid fishes of coral reefs and seagrass beds
 
clostridia
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)
 
clumber
a thickset spaniel with longish silky hair
 
Clupea harangus
commercially important food fish of northern waters of both Atlantic and Pacific
 
Clupea harengus harengus
important food fish; found in enormous shoals in the northern Atlantic
 
Clupea harengus pallasii
important food fish of the northern Pacific
 
Clupea sprattus
small herring processed like a sardine
 
clupeid
any of numerous soft-finned schooling food fishes of shallow waters of northern seas
 
Clydesdale
heavy feathered-legged breed of draft horse originally from Scotland
 
Clydesdale terrier
selectively bred small Skye terrier with erect ears and a long silky coat
 
clypeus
a shield-like plate on the front of an insect's head
 
CMV
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
 
cnidarian
radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
 
coach horse
strong draft horse for drawing coaches
 
coastal diving bird
gull family; skimmer family; jaeger family; auk family
 
coat
growth of hair or wool or fur covering the body of an animal
 
cob
adult male swan
 
cob
stocky short-legged harness horse
 
cobra
venomous Asiatic and African elapid snakes that can expand the skin of the neck into a hood
 
cocci
any spherical or nearly spherical bacteria
 
coccid insect
scale insects and mealybugs
 
coccidium
parasitic on the digestive epithelium of vertebrates and higher invertebrates
 
coccobacillus
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
 
cochin
Asian breed of large fowl with dense plumage and feathered legs
 
Cochlearius cochlearius
tropical American heron related to night herons
 
cock
adult male bird
 
cock
adult male chicken
 
cockatoo
white or light-colored crested parrot of the Australian region; often kept as cage birds
 
cockerel
a young domestic cock; not older than one year
 
cockle
common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs
 
cockroach
any of numerous chiefly nocturnal insects; some are domestic pests
 
cockscomb
the fleshy red crest on the head of the domestic fowl and other gallinaceous birds
 
cocoon
silky envelope spun by the larvae of many insects to protect pupas and by spiders to protect eggs
 
cod
major food fish of Arctic and cold-temperate waters
 
codling
young codfish
 
coelenterate family
a family of coelenterates
 
coelenterate genus
a genus of coelenterates
 
coelenteron
the saclike body cavity of a coelenterate
 
coelophysis
one of the oldest known dinosaurs; late Triassic; cannibalistic
 
Colaptes auratus
large flicker of eastern North America with a red neck and yellow undersurface to wings and tail
 
Colaptes caper collaris
western United States bird with red undersurface to wings and tail
 
Colaptes chrysoides
southwestern United States bird like the yellow-shafted flicker but lacking the red neck
 
Colinus virginianus
a favorite game bird of eastern and central United States
 
coliphage
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
 
collembolan
any of numerous minute wingless primitive insects possessing a special abdominal appendage that allows the characteristic nearly perpetual springing pattern; found in soil rich in organic debris or on the surface of snow or water
 
collie
a silky-coated sheepdog with a long ruff and long narrow head developed in Scotland
 
Collocalia inexpectata
swift of eastern Asia; produces the edible bird's nest
 
Colobus guereza
a colobus monkey with a reddish brown coat and white silky fringes down both sides of the body
 
colobus
arboreal monkey of western and central Africa with long silky fur and reduced thumbs
 
colt
a young male horse under the age of four
 
Coluber constrictor
blackish racer of the eastern United States that grows to six feet
 
Coluber constrictor flaviventris
bluish-green blacksnake found from Ohio to Texas
 
Coluber hippocrepis
slender fast-moving Eurasian snake
 
colubrid
mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes
 
colugo
arboreal nocturnal mammal of southeast Asia and the Philippines resembling a lemur and having a fold of skin on each side from neck to tail that is used for long gliding leaps
 
Columba fasciata
wild pigeon of western North America; often mistaken for the now extinct passenger pigeon
 
Columba livia
pale grey Eurasian pigeon having black-striped wings from which most domestic species are descended
 
Columba palumbus
Eurasian pigeon with white patches on wings and neck
 
columbiform bird
a cosmopolitan order of land birds having small heads and short legs with four unwebbed toes
 
comatulid
free-swimming stalkless crinoid with ten feathery arms; found on muddy sea bottoms
 
comb
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
 
comb-plate
a locomotor organ consisting of a row of strong cilia whose bases are fused
 
commensal
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
 
compsognathus
very small bipedal carnivorous dinosaur of the late Jurassic in Bavaria
 
conceptus
an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
 
conch
any of various edible tropical marine gastropods of the genus Strombus having a brightly-colored spiral shell with large outer lip
 
condor
the largest flying birds in the western hemisphere
 
Condylura cristata
amphibious mole of eastern North America having pink fleshy tentacles around the nose
 
Conepatus leuconotus
large naked-muzzled skunk with white back and tail; of southwestern North America and Mexico
 
coney
any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes
 
coney
small short-eared burrowing mammal of rocky uplands of Asia and western North America
 
coney
any of various burrowing animals of the family Leporidae having long ears and short tails; some domesticated and raised for pets or food
 
conferva
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
 
congenator
an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus)
 
conger
large dark-colored scaleless marine eel found in temperate and tropical coastal waters; some used for food
 
conodont
small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes
 
conodont
the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta
 
conspecific
an organism belonging to the same species as another organism
 
constrictor
any of various large nonvenomous snakes that kill their prey by crushing it in its coils
 
Constrictor constrictor
very large boa of tropical America and West Indies
 
Contopus sordidulus
small flycatcher of western North America
 
Contopus virens
small olive-colored woodland flycatchers of eastern North America
 
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
 
coondog
any dog trained to hunt raccoons
 
coonhound
any of several breeds of hound developed for hunting raccoons
 
coot
slate-black slow-flying birds somewhat resembling ducks
 
copepod
minute marine or freshwater crustaceans usually having six pairs of limbs on the thorax; some abundant in plankton and others parasitic on fish
 
copper
any of various small butterflies of the family Lycaenidae having coppery wings
 
Coracias garrulus
common European blue-and-green roller with a reddish-brown back
 
coraciiform bird
chiefly short-legged arboreal nonpasserine birds that nest in holes
 
Coragyps atratus
American vulture smaller than the turkey buzzard
 
coral
marine colonial polyp characterized by a calcareous skeleton; masses in a variety of shapes often forming reefs
 
Coregonus artedi
important food fish of cold deep lakes of North America
 
Coregonus clupeaformis
found in the Great Lakes and north to Alaska
 
coreid
a true bug
 
cornetfish
slender tropical fish with a long tubular snout and bony plates instead of scales
 
Cornish fowl
English breed of compact domestic fowl; raised primarily to crossbreed to produce roasters
 
coronet
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
 
corynebacterium
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
 
corythosaur
duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet
 
coscoroba
large white South American bird intermediate in some respects between ducks and swans
 
cosmid
(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
 
Cotswold
sheep with long wool originating in the Cotswold Hills
 
cotton stainer
a true bug: bug that damages and stains the lint of developing cotton
 
cotton strain
feeds primarily on cotton
 
cottontail
common small rabbit of North America having greyish or brownish fur and a tail with a white underside; a host for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)
 
Coturnix coturnix
the typical Old World quail
 
coucal
Old World ground-living cuckoo having a long dagger-like hind claw
 
Count Fleet
thoroughbred that won the triple crown in 1943
 
courser
swift-footed terrestrial plover-like bird of southern Asia and Africa; related to the pratincoles
 
courser
a dog trained for coursing
 
cow
mature female of mammals of which the male is called `bull'
 
cow pony
a light saddle horse trained for herding cattle
 
cow
female of domestic cattle:
 
cowbird
North American blackbird that follows cattle and lays eggs in other birds' nests
 
cowrie
any of numerous tropical marine gastropods of the genus Cypraea having highly polished usually brightly marked shells
 
Coxsackie virus
enterovirus causing a disease resembling poliomyelitis but without paralysis
 
coydog
offspring of a coyote and a dog
 
crab
decapod having eyes on short stalks and a broad flattened carapace with a small abdomen folded under the thorax and pincers
 
crab-eating opossum
South American opossum
 
crabeater seal
silvery grey Antarctic seal subsisting on crustaceans
 
crake
any of several short-billed Old World rails
 
crampfish
any sluggish bottom-dwelling ray of the order Torpediniformes having a rounded body and electric organs on each side of the head capable of emitting strong electric discharges
 
crane
large long-necked wading bird of marshes and plains in many parts of the world
 
crane fly
long-legged slender flies that resemble large mosquitoes but do not bite
 
craniate
animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
 
crappie
small sunfishes of central United States rivers
 
craw
a pouch in many birds and some lower animals that resembles a stomach for storage and preliminary maceration of food
 
crawdad
small freshwater decapod crustacean that resembles a lobster
 
crawfish
large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters
 
creeper
any of various small insectivorous birds of the northern hemisphere that climb up a tree trunk supporting themselves on stiff tail feathers and their feet
 
creepy-crawly
an animal that creeps or crawls (such as worms or spiders or insects)
 
crest
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
 
cricket
leaping insect; male makes chirping noises by rubbing the forewings together
 
cricket frog
either of two frogs with a clicking call
 
crinoid
primitive echinoderms having five or more feathery arms radiating from a central disk
 
critter
a regional term for `creature' (especially for domestic animals)
 
Cro-magnon
extinct human of Upper Paleolithic in Europe
 
croaker
any of several fishes that make a croaking noise
 
Crocethia alba
small sandpiper that breeds in the Arctic and migrates southward along sandy coasts in most of world
 
crocodile
large voracious aquatic reptile having a long snout with massive jaws and sharp teeth and a body covered with bony plates; of sluggish tropical waters
 
crocodilian
extant archosaurian reptile
 
Crocodylus niloticus
a dangerous crocodile widely distributed in Africa
 
Crocodylus porosus
estuarine crocodile of eastern Asia and Pacific islands
 
Crocuta crocuta
African hyena noted for its distinctive howl
 
cross
(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
 
crossopterygian
any fish of the order Crossopterygii; most known only in fossil form
 
Crotalus adamanteus
large deadly rattlesnake with diamond-shaped markings
 
Crotalus cerastes
small pale-colored desert rattlesnake of southwestern United States; body moves in an s-shaped curve
 
Crotalus horridus atricaudatus
southern variety
 
Crotalus horridus horridus
widely distributed in rugged ground of eastern United States
 
Crotalus lepidus
mountain rock dweller of Mexico and most southern parts of United States southwest
 
Crotalus mitchellii
markings vary but usually harmonize with background; of southwestern Arizona and Baja California
 
Crotalus scutulatus
extremely dangerous; most common in areas of scattered scrubby growth; from Mojave Desert to western Texas and into Mexico
 
Crotalus tigris
having irregularly cross-banded back; of arid foothills and canyons of southern Arizona and Mexico
 
croup
the part of an animal that corresponds to the human buttocks
 
crow
black birds having a raucous call
 
crow blackbird
long-tailed American blackbird having iridescent black plumage
 
crowbait
an emaciated horse likely soon to become carrion and so attractive to crows
 
crucifix fish
sea catfish of the Caribbean area
 
crustacean
any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton
 
Cryptacanthodes maculatus
eellike Atlantic bottom fish with large almost vertical mouth
 
Cryptobranchus alleganiensis
large salamander of North American rivers and streams
 
cryptomonad
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
 
ctenidium
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
 
cub
the young of certain carnivorous mammals such as the bear or wolf or lion
 
cuckoo
any of numerous European and North American birds having pointed wings and a long tail
 
cuckoo-bumblebee
a bee that is parasitic in the nests of bumblebees
 
cuculiform bird
birds having zygodactyl feet (except for the touracos)
 
Culex pipiens
common house mosquito
 
Culex quinquefasciatus
widespread tropical mosquito that transmits filarial worms
 
Cuniculus paca
large burrowing rodent of South America and Central America; highly esteemed as food
 
Cuon alpinus
fierce wild dog of the forests of central and southeast Asia that hunts in packs
 
cupule
a sucker on the feet of certain flies
 
cur
an inferior dog or one of mixed breed
 
curassow
large crested arboreal game bird of warm parts of the Americas having long legs and tails; highly esteemed as game and food
 
curlew
large migratory shorebirds of the sandpiper family; closely related to woodcocks but having a down-curved bill
 
curly-coated retriever
an English breed having a tightly curled black or liver-colored coat; retrieves game from land or water
 
Cursorius cursor
courser of desert and semidesert regions of the Old World
 
cuscus
woolly-haired monkey-like arboreal marsupial of New Guinea and northern Australia
 
cusk-eel
elongate compressed somewhat eel-shaped fishes
 
cuticula
the outer body wall of an insect
 
cutlassfish
long-bodied marine fishes having a long whiplike scaleless body and sharp teeth; closely related to snake mackerel
 
cuttle
ten-armed oval-bodied cephalopod with narrow fins as long as the body and a large calcareous internal shell
 
cutworm
North American moth whose larvae feed on young plant stems cutting them off at the ground
 
Cyanocitta cristata
common jay of eastern North America; bright blue with grey breast
 
Cyclopes didactylus
squirrel-sized South American toothless anteater with long silky golden fur
 
cyclops
minute free-swimming freshwater copepod having a large median eye and pear-shaped body and long antennae used in swimming; important in some food chains and as intermediate hosts of parasitic worms that affect man e.g. Guinea worms
 
Cyclopterus lumpus
clumsy soft thick-bodied northern Atlantic fish with pelvic fins fused into a sucker; edible roe used for caviar
 
cyclostome
primitive aquatic vertebrate
 
cygnet
a young swan
 
Cygnus atratus
large Australian swan having black plumage and a red bill
 
Cygnus buccinator
large pure white wild swan of western North America having a sonorous cry
 
Cygnus columbianus
swan that nests in tundra regions of the New and Old Worlds
 
Cygnus columbianus bewickii
Eurasian subspecies of tundra swan; smaller than the whooper
 
Cygnus columbianus columbianus
North American subspecies of tundra swan having a soft whistling note
 
Cygnus cygnus
common Old World swan noted for its whooping call
 
Cygnus olor
soundless Eurasian swan; commonly domesticated
 
cynipid gall wasp
small solitary wasp that produces galls on oaks and other plants
 
Cynocephalus variegatus
a variety of flying lemur
 
cynodont
small carnivorous reptiles
 
Cynomys gunnisoni
tail is white tipped
 
Cynomys ludovicianus
tail is black tipped
 
Cynopterus sphinx
a variety of fruit eating bat
 
Cynoscion nebulosus
weakfish of southern Atlantic and Gulf Coasts of United States
 
Cynoscion regalis
food and game fish of North American coastal waters with a mouth from which hooks easily tear out
 
Cypraea moneta
cowrie whose shell is used for money in parts of the southern Pacific and in parts of Africa
 
Cypraea tigris
cowrie whose shell is used for ornament
 
cyprinid
soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales
 
cypriniform fish
a soft-finned fish of the order Cypriniformes
 
cyprinodont
any member of the family Cyprinodontidae
 
Cyprinus carpio
large Old World freshwater bottom-feeding fish introduced into Europe from Asia; inhabits ponds and sluggish streams and often raised for food; introduced into United States where it has become a pest
 
Cystophora cristata
medium-sized blackish-grey seal with large inflatable sac on the head; of Arctic and northern Atlantic waters
 
cytostome
mouth of a protozoan
 
dabbler
any of numerous shallow-water ducks that feed by upending and dabbling
 
Dacelo gigas
Australian kingfisher having a loud cackling cry
 
Dactylopius coccus
Mexican red scale insect that feeds on cacti; the source of a red dye
 
dairy cattle
cattle that are reared for their milk
 
dam
female parent of an animal especially domestic livestock
 
Dama dama
small Eurasian deer
 
Damaliscus lunatus
a large South African antelope; considered the swiftest hoofed mammal
 
Damaraland mole rat
colonial mole rat of western Africa; similar to naked mole rat
 
damselfish
small brilliantly colored tropical marine fishes of coral reefs
 
damselfly
slender non-stinging insect similar to but smaller than the dragonfly but having wings folded when at rest
 
danaid
large tropical butterfly with degenerate forelegs and an unpleasant taste
 
Danaus plexippus
large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed
 
Dandie Dinmont terrier
a breed of small terrier with long wiry coat and drooping ears
 
daphnia
minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae
 
dark horse
a racehorse about which little is known
 
darkling beetle
sluggish hard-bodied black terrestrial weevil whose larvae feed on e.g. decaying plant material or grain
 
darning needle
slender-bodied non-stinging insect having iridescent wings that are outspread at rest; adults and nymphs feed on mosquitoes etc.
 
darter
a person or other animal that moves abruptly and rapidly
 
Dasyatis centroura
one of the largest stingrays; found from Cape Cod to Cape Hatteras
 
Dasyprocta aguti
agile long-legged rabbit-sized rodent of Central America and South America and the West Indies; valued as food
 
Dasypus novemcinctus
having nine hinged bands of bony plates; ranges from Texas to Paraguay
 
dasyure
any of several more or less arboreal marsupials somewhat resembling martens
 
dasyurid
small carnivorous nocturnal marsupials of Australia and Tasmania
 
Dasyurus quoll
a variety of dasyure
 
Dasyurus viverrinus
carnivorous arboreal cat-like marsupials of Australia and Tasmania
 
Daubentonia madagascariensis
nocturnal lemur with long bony fingers and rodent-like incisor teeth closely related to the lemurs
 
dawn horse
earliest horse; extinct primitive dog-sized four-toed Eocene animal
 
dayfly
slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days
 
decapod
cephalopods having eight short tentacles plus two long ones
 
decapod
crustaceans characteristically having five pairs of locomotor appendages each joined to a segment of the thorax
 
Decapterus macarellus
small silvery fish; Nova Scotia to Brazil
 
Decapterus punctatus
small fusiform fish of western Atlantic
 
definitive host
the host in which the sexual reproduction of a parasite takes place
 
defoliator
an insect that strips the leaves from plants
 
deinocheirus
lightly built medium-sized theropod with long limbs and neck
 
deinonychus
swift agile wolf-sized bipedal dinosaur having a large curved claw on each hind foot; of the Cretaceous
 
Delichon urbica
common small European martin that builds nests under the eaves of houses
 
Delphinapterus leucas
small northern whale that is white when adult
 
Delphinus delphis
black-and-white dolphin that leaps high out of the water
 
Dendroaspis augusticeps
a highly venomous southern African mamba dreaded because of its quickness and readiness to bite
 
Dendroctonus rufipennis
small beetle that likes to bore through the bark of spruce trees and eat the cambium which eventually kills the tree
 
Dendroica auduboni
common warbler of western North America
 
Dendroica coronata
similar to Audubon's warbler
 
Dendroica petechia
yellow-throated American wood warbler
 
Dendroica striate
North American warbler having a black-and-white head
 
Dendroica tigrina
North American wood warbler; olive green and yellow striped with black
 
Denisonia superba
venomous but sluggish reddish-brown snake of Australia
 
denizen
a plant or animal naturalized in a region
 
denticle
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
 
desmid
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
 
devilfish
extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned
 
devilfish
bottom-living cephalopod having a soft oval body with eight long tentacles
 
Devon
red dual-purpose cattle of English origin
 
Dialeurodes citri
whitefly that attacks citrus trees
 
Diapheromera femorata
a variety of stick insect
 
diapsid
reptile having a pair of openings in the skull behind each eye
 
diatom
microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica
 
dibranch
cephalopods having two gills
 
dicamptodon
salamanders found near cold streams throughout the year
 
Diceros bicornis
African rhino; in danger of extinction
 
dickeybird
small bird; adults talking to children sometimes use these words to refer to small birds
 
dictyopterous insect
cockroaches and mantids
 
dicynodont
a kind of therapsid
 
Didelphis marsupialis
omnivorous opossum of the eastern United States; noted for feigning death when in danger; esteemed as food in some areas; considered same species as the crab-eating opossum of South America
 
difflugia
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
 
digitigrade
an animal that walks so that only the toes touch the ground as e.g. dogs and cats and horses
 
dihybrid
a hybrid produced by parents that differ only at two gene loci that have two alleles each
 
dik-dik
any of several small antelopes of eastern Africa of the genus Madoqua; the size of a large rabbit
 
dimetrodon
carnivorous dinosaur of the Permian in North America having a crest or dorsal sail
 
dinoceras
a variety of dinocerate
 
dinocerate
an extinct ungulate
 
dinoflagellate
chiefly marine protozoa having two flagella; a chief constituent of plankton
 
Dinornis giganteus
the largest moa; about 12 feet high
 
dinosaur
any of numerous extinct terrestrial reptiles of the Mesozoic era
 
Diodon holocanthus
similar to but smaller than porcupinefish
 
Diodon hystrix
spines become erect when the body is inflated; worldwide in warm waters
 
Diomedea exulans
very large albatross; white with wide black wings
 
Diomedea nigripes
a variety of albatross with black feet
 
Diphylla ecaudata
similar in size and habits to Desmodus rotundus; of tropical America including southern California and Texas
 
diplococcus
Gram-positive bacteria usually occurring in pairs
 
Diplococcus pneumoniae
bacterium causing pneumonia in mice and humans
 
diplodocus
a huge quadrupedal herbivore with long neck and tail; of late Jurassic in western North America
 
diploid
(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
 
dipper
small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom
 
Dipsosaurus dorsalis
small long-tailed lizard of arid areas of southwestern United States and northwestern Mexico
 
dipteran
insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing
 
diver
large somewhat primitive fish-eating diving bird of the northern hemisphere having webbed feet placed far back; related to the grebes
 
diving duck
any of various ducks of especially bays and estuaries that dive for their food
 
diving petrel
any of several small diving birds of southern hemisphere seas; somewhat resemble auks
 
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
 
dobbin
a quiet plodding workhorse
 
Doberman pinscher
medium large breed of dog of German origin with a glossy black and tan coat; used as a watchdog
 
dobson
large brown aquatic larva of the dobsonfly; used as fishing bait
 
dock
the solid bony part of the tail of an animal as distinguished from the hair
 
doe
mature female of mammals of which the male is called `buck'
 
dog-day cicada
its distinctive song is heard during July and August
 
dogfish
any of several small sharks
 
dogie
motherless calf in a range herd of cattle
 
Dolichonyx oryzivorus
migratory American songbird
 
Dolichotis patagonum
hare-like rodent of the pampas of Argentina
 
doliolum
free-swimming oceanic tunicate with a barrel-shaped transparent body
 
dolphin
any of various small toothed whales with a beaklike snout; larger than porpoises
 
dolphin
large slender food and game fish widely distributed in warm seas (especially around Hawaii)
 
domestic animal
any of various animals that have been tamed and made fit for a human environment
 
domestic fowl
a domesticated gallinaceous bird thought to be descended from the red jungle fowl
 
domestic pigeon
domesticated pigeon raised for sport or food
 
Dominique
American breed of chicken having barred grey plumage raised for meat and brown eggs
 
Donald Duck
a fictional duck created in animated film strips by Walt Disney
 
dorbeetle
Old World dung beetle that flies with a droning sound
 
Dorking
an English breed of large domestic fowl having five toes (the hind toe doubled)
 
dormouse
small furry-tailed squirrel-like Old World rodent that becomes torpid in cold weather
 
dorsal fin
unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance
 
dory
marine fishes widely distributed in mid-waters and deep slope waters
 
dove
any of numerous small pigeons
 
dowitcher
shorebird of the sandpiper family that resembles a snipe
 
down
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
 
dragon
any of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the body
 
dragonet
small often brightly colored scaleless marine bottom-dwellers; found in tropical and warm temperate waters of Europe and America
 
drake
adult male of a wild or domestic duck
 
Dreissena polymorpha
inch long mollusk imported accidentally from Europe; clogs utility inlet pipes and feeds on edible freshwater mussels
 
driftfish
small (6 inches) tropical butterfishes found worldwide
 
driftfish
larger butterfishes of the western Atlantic from the New York area to the northern Gulf of Mexico
 
dromaeosaur
a kind of maniraptor
 
Dromaius novaehollandiae
large Australian flightless bird similar to the ostrich but smaller
 
drone
stingless male bee in a colony of social bees (especially honeybees) whose sole function is to mate with the queen
 
Drosophila melanogaster
small fruit fly used by Thomas Hunt Morgan in studying basic mechanisms of inheritance
 
drum
small to medium-sized bottom-dwelling food and game fishes of shallow coastal and fresh waters that make a drumming noise
 
dry-wood termite
any of various termites that live in and feed on dry wood that is not connected with the soil
 
Drymarchon corais
large dark-blue nonvenomous snake that invades burrows; found in southern North America and Mexico
 
Drymarchon corais couperi
a variety of indigo snake
 
dryopithecine
considered a possible ancestor to both anthropoid apes and humans
 
Dryopithecus Rudapithecus hungaricus
fossil hominoids from northern central Hungary; late Miocene
 
duck
small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs
 
duck 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
 
duckling
young duck
 
dug
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
 
dun
horse of a dull brownish grey color
 
dung beetle
any of numerous beetles that roll balls of dung on which they feed and in which they lay eggs
 
Duplicidentata
in former classifications considered a suborder of Rodentia coextensive with the order Lagomorpha: gnawing animals
 
Durham
English breed of short-horned cattle
 
Dusicyon cancrivorus
wild dog of northern South America
 
dusky salamander
common North American salamander mottled with dull brown or greyish-black
 
dusky-footed wood rat
a wood rat with dusky feet
 
dwarf pocket rat
small silky-haired pouched rodent; similar to but smaller than kangaroo rats
 
Eacles imperialis
large American moth having yellow wings with purplish or brownish markings; larvae feed on e.g. maple and pine trees
 
eagle ray
powerful free-swimming tropical ray noted for `soaring' by flapping winglike fins; usually harmless but has venomous tissue near base of the tail as in stingrays
 
eaglet
a young eagle
 
eared seal
pinniped mammal having external ear flaps and hind limbs used for locomotion on land; valued for its soft underfur
 
earless lizard
any of several slender lizards without external ear openings: of plains of western United States and Mexico
 
earless seal
any of several seals lacking external ear flaps and having a stiff hairlike coat with hind limbs reduced to swimming flippers
 
earwig
any of numerous insects of the order Dermaptera having elongate bodies and slender many-jointed antennae and a pair of large pincers at the rear of the abdomen
 
Easter bunny
a rabbit that delivers Easter eggs
 
eastern kingbird
a kingbird that breeds in North America and winters in tropical America; distinguished by a white band on the tip of the tail
 
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
 
echinococcus
tapeworms whose larvae are parasitic in humans and domestic animals
 
echinoderm
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
 
echovirus
any of a group of viruses associated with various diseases including viral meningitis and mild respiratory disorders and diarrhea in newborn infants
 
ectoblast
the outer germ layer that develops into skin and nervous tissue
 
ectoparasite
any external parasitic organism (as fleas)
 
Ectopistes migratorius
gregarious North American migratory pigeon now extinct
 
ectoproct
sessile mossy aquatic animal having the anus of the polyp outside the crown of tentacles
 
ectotherm
an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals
 
edaphosaurus
heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic
 
edentate
primitive terrestrial mammal with few if any teeth; of tropical Central America and South America
 
Edmontonia
heavily armored and highly spiked dinosaur with semi-upright posture
 
edmontosaurus
duck-billed dinosaur from Canada found as a fossilized mummy with skin
 
eel
voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins
 
eelblenny
eellike fishes found in subarctic coastal waters
 
eelpout
marine eellike mostly bottom-dwelling fishes of northern seas
 
eelworm
any of various small free-living plant-parasitic roundworms
 
eft
a newt in its terrestrial stage of development
 
egg
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
 
eggar
moth having nonfunctional mouthparts as adults; larvae feed on tree foliage and spin egg-shaped cocoons
 
egret
any of various usually white herons having long plumes during breeding season
 
Egretta caerulea
small bluish-grey heron of the western hemisphere
 
Egretta garzetta
Old World egret
 
Egretta thula
small New World egret
 
Egyptian cat
a domestic cat of Egypt
 
Egyptian cobra
cobra used by the Pharaohs as a symbol of their power over life and death
 
eider
duck of the northern hemisphere much valued for the fine soft down of the females
 
eiderdown
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
 
eland
either of two large African antelopes of the genus Taurotragus having short spirally twisted horns in both sexes
 
Elanoides forficatus
graceful North American black-and-white kite
 
Elanus leucurus
grey-and-white American kite of warm and tropical regions
 
Elaphe guttata
large harmless snake of southeastern United States; often on farms
 
Elaphe obsoleta
large harmless shiny black North American snake
 
Elaphurus davidianus
large Chinese deer surviving only in domesticated herds
 
elapid
any of numerous venomous fanged snakes of warmer parts of both hemispheres
 
elasmobranch
any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks; rays; skates
 
elater
any of various widely distributed beetles
 
elbow
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
 
elephant
five-toed pachyderm
 
elephant seal
either of two large northern Atlantic earless seals having snouts like trunks
 
Elops saurus
game fish resembling the tarpon but smaller
 
elver
young eel
 
elytron
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
 
emperor
large richly colored butterfly
 
encolure
the mane of a horse
 
endameba
any ameba of the genus Endamoeba
 
Endamoeba histolytica
the parasitic ameba that causes amebic dysentery in human beings
 
endoblast
the inner germ layer that develops into the lining of the digestive and respiratory systems
 
endoparasite
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
 
enterovirus
any of a group of picornaviruses that infect the gastrointestinal tract and can spread to other areas (especially the nervous system)
 
entire
uncastrated adult male horse
 
EntleBucher
the smallest of the Sennenhunde
 
entoproct
any of various moss-like aquatic animals usually forming branching colonies; each polyp having a both mouth and anus within a closed ring of tentacles
 
eoraptor
a theropod dinosaur of the genus Eoraptor
 
ephemeral
anything short-lived, as an insect that lives only for a day in its winged form
 
ephemerid
short-lived insect
 
Ephestia elutella
small moth whose larvae feed on tobacco and other dried plant products
 
Ephippiorhynchus senegalensis
large black-and-white stork of tropical Africa; its red bill has a black band around the middle
 
Epilachna varivestis
introduced into the United States from Mexico; feeds on the foliage of the bean plant
 
Epinephelus adscensionis
found around rocky coasts or on reefs
 
Epinephelus fulvus
black-spotted usually dusky-colored fish with reddish fins
 
Epstein-Barr virus
the herpes virus that causes infectious mononucleosis; associated with specific cancers in Africa and China
 
eptatretus
a fossil hagfish of the genus Eptatretus
 
Eptesicus fuscus
rather large North American brown bat; widely distributed
 
Eptesicus serotinus
common brown bat of Europe
 
Equetus lanceolatus
black-and-white drumfish with an erect elongated dorsal fin
 
Equetus pulcher
a kind of drumfish
 
equid
hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck
 
Equus asinus
domestic beast of burden descended from the African wild ass; patient but stubborn
 
Equus caballus
solid-hoofed herbivorous quadruped domesticated since prehistoric times
 
Equus caballus gomelini
European wild horse extinct since the early 20th century
 
Equus caballus przewalskii
wild horse of central Asia that resembles an ass; now endangered
 
Equus grevyi
zebra with less continuous stripes
 
Equus hemionus
Asiatic wild ass
 
Equus hemionus hemionus
Mongolian wild ass
 
Equus kiang
wild ass of Tibet and Mongolia
 
Equus quagga
mammal of South Africa that resembled a zebra; extinct since late 19th century
 
Equus zebra zebra
narrow-striped nearly extinct zebra of southern Africa
 
Erethizon dorsatum
porcupine of northeastern North America with barbed spines concealed in the coarse fur; often gnaws buildings for salt and grease
 
Eretmochelys imbricata
pugnacious tropical sea turtle with a hawk-like beak; source of food and the best tortoiseshell
 
Erignathus barbatus
medium-sized greyish to yellow seal with bristles each side of muzzle; of the Arctic Ocean
 
Erinaceus europeaeus
small nocturnal Old World mammal covered with both hair and protective spines
 
Eriosoma lanigerum
primarily a bark feeder on aerial parts and roots of apple and other trees
 
Erithacus rubecola
small Old World songbird with a reddish breast
 
Erithacus svecicus
songbird of northern Europe and Asia
 
Erolia alpina
small common sandpiper that breeds in northern or Arctic regions and winters in southern United States or Mediterranean regions
 
Erolia minutilla
smallest American sandpiper
 
erwinia
rod-shaped motile bacteria that attack plants
 
Erythrocebus patas
reddish long-tailed monkey of west Africa
 
escallop
edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions
 
escherichia
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
 
eubacteria
a large group of bacteria having rigid cell walls; motile types have flagella
 
eucaryote
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
 
euglena
minute single-celled green freshwater organism having a single flagella; often classed as algae
 
euglenid
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
 
eurypterid
large extinct scorpion-like arthropod considered related to horseshoe crabs
 
Eutamius sibiricus
terrestrial Siberian squirrel
 
eutherian
mammals having a placenta; all mammals except monotremes and marsupials
 
Euthynnus pelamis
oceanic schooling tuna of considerable value in Pacific but less in Atlantic; reaches 75 pounds; very similar to if not the same as oceanic bonito
 
ewe
female sheep
 
Exmoor
horned sheep of Devon; valued for mutton
 
Exmoor
stocky breed of pony with a fawn-colored nose
 
external gill
occurs in some mollusks and in tadpoles and other immature amphibians
 
eyas
an unfledged or nestling hawk
 
eyecup
(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
 
falcon
diurnal birds of prey having long pointed powerful wings adapted for swift flight
 
falcon-gentil
female falcon especially a female peregrine falcon
 
fall cankerworm
green or brown white-striped looper; larva of Alsophila pometaria
 
false saber-toothed tiger
North American cat of the Miocene and Pliocene; much earlier and less specialized than members of the genus Smiledon
 
false scorpion
small nonvenomous arachnid resembling a tailless scorpion
 
false vampire
any New or Old World carnivorous bat erroneously thought to suck blood but in fact feeding on insects
 
family Acanthisittidae
alternative names for the family comprising the New Zealand wrens
 
family Acanthuridae
surgeonfishes
 
family Acaridae
mites
 
family Accipitridae
hawks; Old World vultures; kites; harriers; eagles
 
family Acipenseridae
sturgeons
 
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
poachers
 
family Ailuropodidae
in some classifications considered the family comprising the giant pandas
 
family Akeridae
bubble shells
 
family Alaudidae
larks
 
family Albulidae
bonefish
 
family Alcedinidae
kingfishers
 
family Alcidae
web-footed diving seabirds of northern seas: auks; puffins; guillemots; murres; etc.
 
family Aleyrodidae
whiteflies
 
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
wolffishes
 
family Anatidae
swimming birds having heavy short-legged bodies and bills with a horny tip: swans; geese; ducks
 
family Ancylidae
freshwater gastropod
 
family Ancylostomatidae
hookworms
 
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
screamers
 
family Anhingidae
snakebirds
 
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
crayfish
 
family Atherinidae
small spiny-finned fishes of both salt and fresh water
 
family Athiorhodaceae
small motile sulphur bacteria
 
family Atrichornithidae
scrubbirds
 
family Atropidae
booklice
 
family Aulostomidae
trumpetfishes
 
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
shoebills
 
family Balaenidae
right whales
 
family Balaenopteridae
rorquals; blue whales
 
family Balanidae
stalkless barnacles
 
family Balistidae
triggerfishes
 
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
lancelets
 
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
whelks
 
family Bucconidae
puffbirds
 
family Bucerotidae
hornbills
 
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
dragonets
 
family Calliphoridae
blowflies
 
family Callithricidae
marmosets
 
family Camelidae
camels and llamas and vicunas
 
family Cancridae
many of the best known edible crabs
 
family Canidae
dogs; wolves; jackals; foxes
 
family Capitonidae
barbets
 
family Caprimulgidae
goatsuckers
 
family Caproidae
boarfishes
 
family Capromyidae
coypus
 
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
beavers
 
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
shrimpfishes
 
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
creepers
 
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
midges
 
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
leafhoppers
 
family Cicadidae
cicadas
 
family Cichlidae
cichlids
 
family Cicindelidae
tiger beetles
 
family Ciconiidae
storks
 
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
loaches
 
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
rollers
 
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
dobsons
 
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
sculpins
 
family Cracidae
curassows; guans; chachalacas
 
family Cracticidae
Australian birds formerly included in the family Laniidae
 
family Crangonidae
shrimps
 
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
mosquitoes
 
family Curculionidae
true weevils: snout beetles
 
family Cuterebridae
New World botflies
 
family Cyclopteridae
lumpfishes
 
family Cymatiidae
tritons
 
family Cynipidae
a family of Hymenoptera
 
family Cynocephalidae
a family of Dermoptera
 
family Cynoglossidae
tonguefishes
 
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
armadillos
 
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
dolphins
 
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
opossums
 
family Dinornithidae
moas
 
family Diodontidae
spiny puffers
 
family Diomedeidae
albatrosses
 
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
sleepers
 
family Elephantidae
elephants
 
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
anchovies
 
family Enterobacteriaceae
a large family of Gram-negative rod-shaped bacteria of the order Eubacteriales
 
family Ephemeridae
mayflies
 
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
cornetfishes
 
family Forficulidae
typical earwigs
 
family Formicariidae
antbirds
 
family Formicidae
ants
 
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
jacamars
 
family Gasterophilidae
horse botflies
 
family Gasterosteidae
sticklebacks
 
family Gavialidae
gavials
 
family Gavidae
loon family
 
family Gekkonidae
geckos
 
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
mojarras
 
family Gerrididae
an arthropod family that includes water striders
 
family Gigartinaceae
a family of protoctist
 
family Giraffidae
giraffes
 
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
clingfishes
 
family Gobiidae
gobies
 
family Gomphotheriidae
elephants extinct since the Pleistocene
 
family Gonorhynchidae
coextensive with the genus Gonorhynchus
 
family Gracilariidae
leaf miners
 
family Gruidae
cranes
 
family Gryllidae
crickets
 
family Gyrinidae
whirligig beetles
 
family Hadrosauridae
duck-billed dinosaurs; upper Cretaceous
 
family Haematopodidae
oystercatchers
 
family Haemoproteidae
bird parasites
 
family Haemulidae
grunts
 
family Halictidae
a family of small solitary bees; many are valuable pollinators for agriculture
 
family Haliotidae
abalones
 
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
greenlings
 
family Hexanchidae
primitive sharks
 
family Hippoboscidae
winged or wingless dipterans: louse flies
 
family Hippopotamidae
hippopotami
 
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
hyenas
 
family Hydrobatidae
storm petrels
 
family Hydrochoeridae
capybara
 
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
iguanodons
 
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
wrasses
 
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
opahs
 
family Lampyridae
fireflies
 
family Laniidae
shrikes
 
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
firebrats
 
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
slugs
 
family Limulidae
horseshoe crabs
 
family Liparididae
snailfishes
 
family Lithodidae
deep-sea crabs of cold waters
 
family Littorinidae
periwinkles
 
family Lobotidae
tripletails
 
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
snappers
 
family Luvaridae
louvars
 
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
grenadiers
 
family Majidae
spider crabs
 
family Malacanthidae
short-headed marine fishes; often brightly colored
 
family Manidae
coextensive with the order Pholidota
 
family Manteidae
mantises
 
family Mantispidae
mantispids
 
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
megalosaurs
 
family Megapodiidae
megapodes
 
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
lyrebirds
 
family Meropidae
bee-eaters
 
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
filefishes
 
family Monodontidae
narwhals
 
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
touracos
 
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
antlions
 
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
moonshells
 
family Nautilidae
spiral-shelled cephalopods
 
family Nephropsidae
in some classifications coextensive with the Homaridae
 
family Nepidae
water scorpions
 
family Neritidae
neritids
 
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
jawfishes
 
family Orchestiidae
beach fleas
 
family Orectolobidae
nurse sharks and carpet sharks
 
family Oriolidae
Old World orioles
 
family Ornithorhynchidae
platypus
 
family Orycteropodidae
aardvarks
 
family Oscillatoriaceae
blue green algae
 
family Osmeridae
smelts
 
family Osteoglossidae
a family of large fishes that live in freshwater; includes bandfish and bonytongues
 
family Ostraciontidae
boxfishes
 
family Ostreidae
oysters
 
family Otariidae
eared seals: sea lions and fur seals
 
family Otididae
bustards
 
family Oxyuridae
pinworms
 
family Paguridae
hermit crabs
 
family Palaemonidae
prawns
 
family Palinuridae
spiny lobsters
 
family Pandionidae
ospreys
 
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
scallops
 
family Pediculidae
true lice: human lice and related forms
 
family Pelecanidae
pelicans
 
family Pelecanoididae
diving petrels
 
family Pelobatidae
the amphibian family of spadefoot toads
 
family Pempheridae
sweepers
 
family Peneidae
tropical prawns
 
family Pennatulidae
sea pens
 
family Peramelidae
bandicoots
 
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
lampreys
 
family Phaethontidae
tropicbirds
 
family Phalacrocoracidae
cormorants
 
family Phalangeridae
phalangers; koalas
 
family Phalangiidae
a family of Phalangida
 
family Phalaropidae
phalaropes
 
family Phasianidae
pheasants; quails; partridges
 
family Phasmatidae
stick insects
 
family Phocidae
earless seals
 
family Phoenicopteridae
flamingos
 
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
woodpeckers
 
family Pieridae
arthropod family including cabbage butterflies; sulphur butterflies
 
family Pinnotheridae
tiny soft-bodied crabs
 
family Pipidae
tongueless frogs
 
family Pipridae
manakins
 
family Pittidae
pittas
 
family Plasmodiidae
malaria parasites
 
family Plataleidae
spoonbills
 
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
weaverbirds
 
family Podargidae
frogmouths
 
family Podicipedidae
coextensive with the order Podicipitiformes
 
family Poeciliidae
topminnows
 
family Polynemidae
threadfins
 
family Polyodontidae
paddlefishes
 
family Polypedatidae
Old World tree frogs
 
family Pomacentridae
damselfishes
 
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
trumpeters
 
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
sandgrouses
 
family Pterodactylidae
a reptile family in the order Pterosauria
 
family Ptilonorhynchidae
bowerbirds
 
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
firebugs
 
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
toucans
 
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
ribbonfishes
 
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
rhinoceroses
 
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
salamanders
 
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
parrotfishes
 
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
skinks
 
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
sirens
 
family Sisyridae
an arthropod family of the order Neuroptera that includes spongeflies
 
family Sittidae
nuthatches
 
family Soleidae
soles
 
family Solenidae
razor clams
 
family Soricidae
shrews
 
family Spalacidae
mole rats
 
family Sparidae
porgies; scups
 
family Sphecidae
mud daubers; some digger wasps
 
family Spheniscidae
comprising all existing penguins
 
family Sphingidae
hawkmoths
 
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
oilbirds
 
family Stenopelmatidae
long-horned grasshoppers
 
family Stercorariidae
jaegers and skuas:
 
family Stichaeidae
pricklebacks
 
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
pipefishes
 
family Synodontidae
soft-finned bottom-dwelling fishes
 
family Tabanidae
horseflies
 
family Tachinidae
parasites on other insects
 
family Tachyglossidae
echidnas
 
family Taeniidae
a family of Cestoda
 
family Talpidae
moles
 
family Tapiridae
tapirs and extinct related forms
 
family Tarsiidae
coextensive with the genus Tarsius: tarsiers
 
family Tayassuidae
peccaries
 
family Teiidae
whiptails; etc.
 
family Tenebrionidae
a family of arthropods including darkling beetles and mealworms
 
family Tenrecidae
tenrecs and extinct related forms
 
family Tenthredinidae
sawflies
 
family Terebellidae
marine burrowing or tube-forming polychete worms usually having long thick bodies
 
family Teredinidae
shipworms
 
family Termitidae
termites
 
family Testudinidae
land tortoises
 
family Tetranychidae
plant-feeding mites
 
family Tetraodontidae
puffers
 
family Tetraonidae
grouse
 
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
tanagers
 
family Threskiornithidae
ibises
 
family Thripidae
thrips
 
family Timaliidae
babblers
 
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
archerfishes
 
family Trachipteridae
ribbonfishes
 
family Tragulidae
chevrotains
 
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
cutlassfishes
 
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
hummingbirds
 
family Troglodytidae
wrens
 
family Trogonidae
coextensive with the order Trogoniformes
 
family Trombiculidae
mites
 
family Trombidiidae
mites
 
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
hoopoes
 
family Uranoscopidae
stargazers
 
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
wombats
 
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
eelpouts
 
family Zygnemataceae
pond scums: common freshwater algae forming green slimy masses
 
fang
hollow or grooved tooth of a venomous snake; used to inject its poison
 
fang
canine tooth of a carnivorous animal; used to seize and tear its prey
 
fang
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
 
fawn
a young deer
 
feather
the light horny waterproof structure forming the external covering of birds
 
feeder
an animal being fattened or suitable for fattening
 
feeder
an animal that feeds on a particular source of food
 
feist
a nervous belligerent little mongrel dog
 
felid
any of various lithe-bodied roundheaded fissiped mammals, many with retractile claws
 
Felis bengalensis
small spotted wildcat of southern Asia and Malaysia
 
Felis chaus
small Asiatic wildcat
 
Felis concolor
large American feline resembling a lion
 
Felis domesticus
any domesticated member of the genus Felis
 
Felis ocreata
widely distributed wildcat of Africa and Asia Minor
 
Felis pardalis
nocturnal wildcat of Central America and South America having a dark-spotted buff-brown coat
 
Felis serval
slender long-legged African wildcat having large untufted ears and tawny black-spotted coat
 
Felis silvestris
bushy-tailed wildcat of Europe that resembles the domestic cat and is regarded as the ancestor of the domestic cat
 
Felis tigrina
medium-sized wildcat of Central America and South America having a dark-striped coat
 
Felis wiedi
small spotted wildcat found from Texas to Brazil
 
Felis yagouaroundi
long-bodied long-tailed tropical American wildcat
 
female
an animal that produces gametes (ova) that can be fertilized by male gametes (spermatozoa)
 
female horse
female equine animal
 
female mammal
animals that nourish their young with milk
 
fence lizard
spiny lizard often seen basking on fences in the United States and northern Mexico
 
Fenusa pusilla
small black sawfly native to Europe but established in eastern United States; larvae mine the leaves of birches causing serious defoliation
 
ferret
domesticated albino variety of the European polecat bred for hunting rats and rabbits
 
ferret badger
small ferret-like badger of southeast Asia
 
fetlock
projection behind and above a horse's hoof
 
fetlock
the joint between the cannon bone and the pastern
 
fetter bone
the part between the fetlock and the hoof
 
fetus
an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal
 
fictional animal
animals that exist only in fiction (usually in children's stories)
 
fiddler crab
burrowing crab of American coastal regions having one claw much enlarged in the male
 
field mouse
any nocturnal Old World mouse of the genus Apodemus inhabiting woods and fields and gardens
 
field mouse
any of various small mouselike rodents of the family Cricetidae (especially of genus Microtus) having a stout short-tailed body and inconspicuous ears and inhabiting fields or meadows
 
field spaniel
large usually black hunting and retrieving spaniel with a dense flat or slightly wavy coat; cross between cocker and Sussex spaniel
 
fig-bird
greenish-yellow Australian oriole feeding chiefly on figs and other fruits
 
fighting cock
a cock bred and trained for fighting
 
filaria
slender threadlike roundworms living in the blood and tissues of vertebrates; transmitted as larvae by biting insects
 
filefish
narrow flattened warm-water fishes with leathery skin and a long file-like dorsal spine
 
filly
a young female horse under the age of four
 
Filoviridae
a family of threadlike RNA viruses that cause diseases in humans and nonhuman primates (monkeys and chimpanzees)
 
filovirus
animal viruses belonging to the family Filoviridae
 
fin
organ of locomotion and balance in fishes and some other aquatic animals
 
finch
any of numerous small songbirds with short stout bills adapted for crushing seeds
 
fingerling
a young or small fish
 
finisher
an animal that wins in a contest of speed
 
fire ant
omnivorous ant of tropical and subtropical America that can inflict a painful sting
 
firebug
a true bug: brightly colored bug that can exude a stain
 
firefly
nocturnal beetle common in warm regions having luminescent abdominal organs
 
first stomach
the first compartment of the stomach of a ruminant; here food is collected and returned to the mouth as cud for chewing
 
fish
any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills
 
fish duck
large crested fish-eating diving duck having a slender hooked bill with serrated edges
 
fish 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
 
fishbone
a bone of a fish
 
fissiped
terrestrial carnivores; having toes separated to the base: dogs; cats; bears; badgers; raccoons
 
Fissipedia
in some classifications considered a suborder of Carnivora
 
Fissurella apertura
marine limpet having a conical shell with an opening at the apex
 
flag
a conspicuously marked or shaped tail
 
flagellate
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
 
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
 
flamingo
large pink to scarlet web-footed wading bird with down-bent bill; inhabits brackish lakes
 
flank
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
 
flatfish
any of several families of fishes having flattened bodies that swim along the sea floor on one side of the body with both eyes on the upper side
 
flathead
food fish of the Indonesian region of the Pacific; resembles gurnards
 
flathead
pallid bottom-dwelling flat-headed fish with large eyes and a duck-like snout
 
flatworm
parasitic or free-living worms having a flattened body
 
Flaviviridae
a family of arboviruses carried by arthropods
 
flavivirus
animal viruses belonging to the family Flaviviridae
 
flea
any wingless bloodsucking parasitic insect noted for ability to leap
 
flea beetle
any small leaf beetle having enlarged hind legs and capable of jumping
 
fledgeling
young bird that has just fledged or become capable of flying
 
fleece
outer coat of especially sheep and yaks
 
flicker
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
 
flipper
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
 
flounder
any of various European and non-European marine flatfish
 
flour beetle
an insect that infests flour and stored grains
 
fluke
either of the two lobes of the tail of a cetacean
 
fluke
parasitic flatworms having external suckers for attaching to a host
 
fly
two-winged insects characterized by active flight
 
flycatching warbler
any of numerous American wood warblers that feed on insects caught on the wing
 
flying fish
tropical marine fishes having enlarged winglike fins used for brief gliding flight
 
flying fox
large bat with a head that resembles the head of a fox
 
flying mouse
tiny flying phalanger
 
flying opossum
nocturnal phalangers that move with gliding leaps using parachute-like folds of skin along the sides of the body
 
flying reptile
an extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimb
 
foal
a young horse
 
food fish
any fish used for food by human beings
 
foot
any of various organs of locomotion or attachment in invertebrates
 
foram
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
 
forefoot
a front foot of a quadruped
 
foreleg
the forelimb of a quadruped
 
forelimb
the front limb (or the homologous structure in other animals, such as a flipper or wing)
 
forelock
a lock of a horse's mane that grows forward between the ears
 
forepaw
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
 
fox
alert carnivorous mammal with pointed muzzle and ears and a bushy tail; most are predators that do not hunt in packs
 
fox terrier
small lively black-and-white terriers formerly used to dig out foxes
 
foxhound
medium-sized glossy-coated hounds developed for hunting foxes
 
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
 
freetail
small swift insectivorous bat with leathery ears and a long tail; common in warm regions
 
French bulldog
small stocky version of the bulldog having a sleek coat and square head
 
freshwater bass
North American food and game fish
 
freshwater clam
bivalve mollusk abundant in rivers of central United States
 
frigate bird
long-billed warm-water seabird with wide wingspan and forked tail
 
Fringilla coelebs
small European finch with a cheerful song
 
Fringilla montifringilla
Eurasian finch
 
fritillary
butterfly with brownish wings marked with black and silver
 
frogfish
fish having a frog-like mouth with a lure on the snout
 
froghopper
a variety of spittlebug
 
frogmouth
insectivorous bird of Australia and southeastern Asia having a wide frog-like mouth
 
fruit bat
large Old World bat of warm and tropical regions that feeds on fruit
 
fruit fly
any of numerous small insects whose larvae feed on fruits
 
fucoid
a fossilized cast or impression of algae of the order Fucales
 
fucoid
any of various algae of the family Fucaceae
 
fucus
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
 
fur
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
 
furcula
a forked bone formed by the fusion of the clavicles of most birds
 
gadfly
any of various large flies that annoy livestock
 
gadoid
a soft-finned fish of the family Gadidae
 
Gadus macrocephalus
closely related to Atlantic cod
 
Gadus morhua
one of the world's most important commercial fishes
 
Galeocerdo cuvieri
large dangerous warm-water shark with striped or spotted body
 
Galeorhinus zyopterus
Pacific shark valued for its fins (used by Chinese in soup) and liver (rich in vitamin A)
 
Galictis vittatus
carnivore of Central America and South America resembling a weasel with a greyish-white back and dark underparts
 
gall gnat
fragile mosquito-like flies that produce galls on plants
 
Gallant Fox
thoroughbred that won the triple crown in 1930
 
Galleria mellonella
moth whose larvae live in and feed on bee honeycombs
 
gallfly
any of various insects that deposit their eggs in plants causing galls in which the larvae feed
 
gallina
small Asiatic wild bird; believed to be ancestral to domestic fowl
 
gallinacean
heavy-bodied largely ground-feeding domestic or game birds
 
Gallinago gallinago
common snipe of Eurasia and Africa
 
Gallinago gallinago delicata
American snipe
 
Gallinago media
Old World snipe larger and darker than the whole snipe
 
Gallinula chloropus
black gallinule that inhabits ponds and lakes
 
Gallinula chloropus cachinnans
North American dark bluish-grey gallinule
 
gallinule
any of various small aquatic birds of the genus Gallinula distinguished from rails by a frontal shield and a resemblance to domestic hens
 
Galloway
breed of hardy black chiefly beef cattle native to Scotland
 
Gallus gallus
a jungle fowl of southeastern Asia that is considered ancestral to the domestic fowl
 
Gallus gallus
a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl
 
Gambusia affinis
silvery topminnow with rows of black spots of tropical North America and West Indies; important in mosquito control
 
game
animal hunted for food or sport
 
game bird
any bird (as grouse or pheasant) that is hunted for sport
 
game fish
any fish providing sport for the angler
 
game fowl
any of several breeds reared for cockfighting
 
gander
mature male goose
 
gannet
large heavily built seabird with a long stout bill noted for its plunging dives for fish
 
ganoid
primitive fishes having thick bony scales with a shiny covering
 
ganoin
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
 
gaskin
lower part of a horse's thigh between the hock and the stifle
 
Gasterophilus intestinalis
parasitic chiefly on horses
 
Gasterosteus
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
 
gastropod
a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes
 
gastrula
double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm
 
Gavialis gangeticus
large fish-eating Indian crocodilian with a long slender snout
 
gaviiform seabird
seabirds of the order Gaviiformes
 
Gazella subgutturosa
a kind of gazelle
 
gazelle
small swift graceful antelope of Africa and Asia having lustrous eyes
 
gecko
any of various small chiefly tropical and usually nocturnal insectivorous terrestrial lizards typically with immovable eyelids; completely harmless
 
gee-gee
a word for horse used by children or in adult slang
 
gelding
castrated male horse
 
Gelechia gossypiella
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
 
gelechiid
small slender-winged moths whose larvae are agricultural pests
 
gempylid
snake mackerels; elongated marine fishes with oily flesh; resembles mackerels; found worldwide
 
Gempylus serpens
predatory tropical fishes with jutting jaws and strong teeth
 
Genetta genetta
agile Old World viverrine having a spotted coat and long ringed tail
 
genus Abramis
European fishes
 
genus Abrocoma
abrocomes
 
genus Abudefduf
damsel fishes
 
genus Acanthisitta
a genus of Xenicidae
 
genus Acanthocybium
wahoos
 
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
cheetahs
 
genus Acipenser
type genus of the Acipenseridae: sturgeons
 
genus Acridotheres
mynas
 
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
copperheads
 
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
shad
 
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
openbills
 
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
pipits
 
genus Antidorcas
springboks
 
genus Antigonia
a genus of fish in the family Caproidae
 
genus Antilocapra
type and sole genus of the Antilocapridae comprising one species
 
genus Antilope
blackbucks
 
genus Antrodemus
carnivorous dinosaur of North America; late Jurassic
 
genus Antrozous
a genus of Vespertilionidae
 
genus Aotus
douroucoulis
 
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
macaws
 
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
binturongs
 
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
turnstones
 
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
fritillaries
 
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
alligatorfishes
 
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
drumfish
 
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
cacomistles
 
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
shrews
 
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
bumblebees
 
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
bitterns
 
genus Bothrops
fer-de-lance
 
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
menhaden
 
genus Brontosaurus
large quadrupedal herbivorous dinosaurs with very long neck and tail; late Jurassic
 
genus Browmius
cusk
 
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
kraits
 
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
uakaris
 
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
caimans
 
genus Cairina
a genus of Anatidae
 
genus Calamus
a genus of Sparidae
 
genus Calidris
a genus of Scolopacidae
 
genus Callicebus
titis
 
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
goats
 
genus Caprella
skeleton shrimp
 
genus Capreolus
roe deer
 
genus Capricornis
serows
 
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
goldfish
 
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
skuas
 
genus Cathartes
type genus of the Cathartidae: turkey vultures
 
genus Catoptrophorus
willet
 
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
mangabeys
 
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
thornbills
 
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
burrfishes
 
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
pichiciago
 
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
towhees
 
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
whiptails
 
genus Coccothraustes
large finches
 
genus Coccus
type genus of the Coccidae
 
genus Coccyzus
a genus of Cuculidae
 
genus Cochlearius
boatbills
 
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
racers
 
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
pewees
 
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
corncrakes
 
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
ani
 
genus Cryptacanthodes
a genus of Stichaeidae
 
genus Cryptobranchus
type genus of the Cryptobranchidae
 
genus Cryptocercus
cockroaches
 
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
pacas
 
genus Cuon
Asiatic wild dog
 
genus Cursorius
coursers
 
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
mambas
 
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
copperheads
 
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
bobolinks
 
genus Dolichotis
maras
 
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
catbirds
 
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
tapeworms
 
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
lerots
 
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
pinworms
 
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
saddlebills
 
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
drumfish
 
genus Equus
type genus of the Equidae: only surviving genus of the family Equidae
 
genus Erethizon
a genus of Erethizontidae
 
genus Eretmochelys
hawksbills
 
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
patas
 
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
avadavats
 
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
anacondas
 
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
puffins
 
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
coots
 
genus Fulmarus
fulmars
 
genus Fundulus
killifish
 
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
snipes
 
genus Gallinula
gallinules
 
genus Gallirallus
rails of New Zealand
 
genus Gallus
common domestic birds and related forms
 
genus Gambelia
leopard lizards
 
genus Gambusia
mosquitofish
 
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
genets
 
genus Genyonemus
a genus of Sciaenidae
 
genus Geochelone
giant tortoises
 
genus Geococcyx
roadrunners
 
genus Geomys
type genus of the Geomyidae
 
genus Geophilus
type genus of the Geophilidae: a cosmopolitan genus of centipedes sometimes called earwigs
 
genus Geothlypis
yellowthroats
 
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
gorillas
 
genus Gracula
mynas
 
genus Grampus
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
oystercatchers
 
genus Haemopis
leeches
 
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
ringhals
 
genus Hemigalus
banded palm civets
 
genus Hemigrammus
tetras
 
genus Hemipteronatus
razor fish
 
genus Hemitripterus
sea ravens
 
genus Hermissenda
genus of marine sea slugs
 
genus Herpestes
mongooses
 
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
tattlers
 
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
seahorses
 
genus Hippodamia
genus of ladybugs
 
genus Hippoglossoides
a genus of Pleuronectidae
 
genus Hippoglossus
halibuts
 
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
hydras
 
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
gibbons
 
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
ibises
 
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
bitterns
 
genus Ixodes
type genus of the family Ixodidae
 
genus Jabiru
jabirus
 
genus Jaculus
jerboas
 
genus Javanthropus
former genus of primitive man; now Homo soloensis: comprises Solo man
 
genus Jordanella
flagfishes
 
genus Junco
American finches
 
genus Jynx
wrynecks
 
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
ptarmigans
 
genus Lagorchestes
hare wallabies
 
genus Lagostomus
viscachas
 
genus Lagothrix
woolly monkeys
 
genus Lama
llamas
 
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
guppies
 
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
tamarins
 
genus Lepas
type genus of the family Lepadidae
 
genus Lepidochelys
ridleys
 
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
bream
 
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
snipe
 
genus Limnodromus
dowitchers
 
genus Limosa
godwits
 
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
squids
 
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
monals
 
genus Loris
type genus of the Lorisidae
 
genus Lota
burbot
 
genus Loxia
crossbill
 
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
puffins
 
genus Luscinia
nightingales
 
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
lynxes
 
genus Lyrurus
black grouse
 
genus Macaca
macaques; rhesus monkeys
 
genus Macrocephalon
maleos
 
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
marlins
 
genus Malaclemys
American terrapins
 
genus Malacosoma
tent caterpillars
 
genus Mallotus
capelins
 
genus Malopterurus
electric catfish
 
genus Mammuthus
extinct genus: mammoths
 
genus Mandrillus
baboons
 
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
marmots
 
genus Martes
martens
 
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
brockets
 
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
scoters
 
genus Melanogrammus
haddock
 
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
ratels
 
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
mergansers
 
genus Meriones
a genus of Cricetidae
 
genus Merlangus
whitings
 
genus Merluccius
hakes
 
genus Merops
type genus of the Meropidae
 
genus Mesocricetus
golden hamsters
 
genus Mesohippus
a genus of Equidae
 
genus Microcentrum
katydids
 
genus Micrococcus
type genus of the family Micrococcaceae
 
genus Microdipodops
kangaroo mice
 
genus Micromyx
Old World harvest mice
 
genus Micropogonias
croakers
 
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
mollies
 
genus Moloch
genus of Australian desert lizard
 
genus Molothrus
cowbirds
 
genus Molva
ling
 
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
muntjacs
 
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
solitaires
 
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
groupers
 
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
grubby
 
genus Naemorhedus
gorals
 
genus Naja
cobras
 
genus Nanomia
a genus of Siphonophora
 
genus Nasalis
proboscis monkeys
 
genus Nasua
coatis
 
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
packrats
 
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
newts
 
genus Notornis
a genus of Rallidae
 
genus Notoryctus
type genus of the family Notoryctidae: comprising solely the marsupial mole
 
genus Notropis
shiners
 
genus Nucifraga
nutcrackers
 
genus Numenius
curlews
 
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
snappers
 
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
wheatears
 
genus Oestrus
type genus of the Oestridae: sheep botflies
 
genus Okapia
okapis
 
genus Oligoplites
leatherjackets
 
genus Ommastrephes
a genus of Decapoda
 
genus Oncorhynchus
Pacific salmon including sockeye salmon; chinook salmon; chum salmon; coho salmon
 
genus Ondatra
muskrats
 
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
chachalacas
 
genus Orthopristis
a genus of Haemulidae
 
genus Orthotomus
tailorbirds
 
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
sheep
 
genus Oxybelis
vine snakes
 
genus Oxylebius
a genus of Hexagrammidae
 
genus Oxyura
ruddy duck
 
genus Oxyuranus
taipans
 
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
baboons
 
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
peafowl
 
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
warthogs
 
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
koalas
 
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
ruffs
 
genus Philophylla
leaf miners
 
genus Phlebotomus
small bloodsucking sand flies that resemble moths
 
genus Phoca
type genus of the Phocidae: earless seals
 
genus Phocoena
porpoises
 
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
minnows
 
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
warblers
 
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
magpies
 
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
towhees
 
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
sakis
 
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
platys
 
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
coursers
 
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
muishonds
 
genus Poephila
grassfinches
 
genus Polioptila
New World gnatcatchers
 
genus Polistes
a genus of Vespidae
 
genus Pollachius
pollack
 
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
wreckfish
 
genus Pomacanthus
angelfishes
 
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
crappies
 
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
potoroos
 
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
bellbirds
 
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
whitefishes
 
genus Proteles
aardwolf
 
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
lionfishes
 
genus Pteropus
a genus of Megachiroptera
 
genus Ptilocercus
pentails
 
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
shearwaters
 
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
bullfinches
 
genus Pyrrhuloxia
large showy finches related to cardinals
 
genus Python
Old World boas
 
genus Quiscalus
grackles
 
genus Rachycentron
genus and family are coextensive and comprise only the cobia
 
genus Raja
type genus of the family Rajidae
 
genus Ramphomicron
thornbills
 
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
cardinals
 
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
killifish
 
genus Roccus
a genus of Serranidae
 
genus Rupicapra
chamois
 
genus Rupicola
cock of the rocks
 
genus Rutilus
roaches
 
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
bonitos
 
genus Sardinia
pilchards
 
genus Sardinops
pilchards
 
genus Sargassum
a genus of protoctist
 
genus Saturnia
type genus of the Saturniidae: emperor moth
 
genus Sauromalus
chuckwallas
 
genus Saurosuchus
early archosaurian carnivore
 
genus Saxicola
Old World chats
 
genus Sayornis
phoebes
 
genus Scaphiopus
New World spadefoot toads
 
genus Scarabaeus
type genus of the Scarabaeidae
 
genus Scardinius
rudds
 
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
rockfishes
 
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
piranhas
 
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
fritillaries
 
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
scups
 
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
pike-perches
 
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
turtledoves
 
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
meerkats
 
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
stonefishes
 
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
sheldrakes
 
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
tarpons
 
genus Tarsius
type and sole genus of the family Tarsiidae
 
genus Taurotragus
African antelopes: elands
 
genus Tautoga
tautogs
 
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
pademelons
 
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
tench
 
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
thrashers
 
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
conenoses
 
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
tejus
 
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
croakers
 
genus Unio
type genus of the family Unionidae
 
genus Upupa
type genus of the Upupidae
 
genus Uria
murres
 
genus Urocyon
grey foxes
 
genus Urophycis
hakes
 
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
whydahs
 
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
foxes
 
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
swordtails
 
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
 
genus-Fenusa
birch leaf miner
 
genus-Megapodius
type genus of the Megapodiidae
 
genus-Milvus
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
 
geoduck
a large edible clam found burrowing deeply in sandy mud along the Pacific coast of North America; weighs up to six pounds; has siphons that can extend to several feet and cannot be withdrawn into the shell
 
geometrid
slender-bodied broad-winged moth whose larvae are called measuring worms
 
Geomys bursarius
gopher of chiefly grasslands of central North America
 
Geomys pinetis
gopher of Alabama and Georgia and Florida
 
gerbil
small Old World burrowing desert rodent with long soft pale fur and hind legs adapted for leaping
 
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
 
giant
any creature of exceptional size
 
giant cockroach
large tropical American cockroaches
 
giant schnauzer
a large schnauzer
 
giant silkworm moth
any silkworm moth of the family Saturniidae
 
giant silkworm
larva of a saturniid moth; spins a large amount of strong silk in constructing its cocoon
 
giant tortoise
very large tortoises of the Galapagos and Seychelles islands
 
giant water bug
large water bug with piercing and sucking mouthparts; feeds on young fishes
 
giardia
a suspected cause of diarrhea in humans
 
gib
a castrated tomcat
 
Ginglymostoma cirratum
small bottom-dwelling shark of warm shallow waters on both coasts of North America and South America and from southeast Asia to Australia
 
Giraffa camelopardalis
tallest living quadruped; having a spotted coat and small horns and very long neck and legs; of savannahs of tropical Africa
 
glareole
Old World shorebird with long pointed wings and short legs; closely related to the coursers
 
glass lizard
snakelike lizard of Europe and Asia and North America with vestigial hind limbs and the ability to regenerate its long fragile tail
 
glass sponge
a siliceous sponge (with glassy spicules) of the class Hyalospongiae
 
Glaucomys sabrinus
large flying squirrel; chiefly of Canada
 
Glaucomys volans
small large-eyed nocturnal flying squirrel of eastern United States
 
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
 
globigerina
marine protozoan having a rounded shell with spiny processes
 
glossina
bloodsucking African fly; transmits sleeping sickness etc.
 
Glossopsitta versicolor
lorikeet with a colorful coat
 
glowworm
the luminous larva or wingless grub-like female of a firefly
 
gnat
(British usage) mosquito
 
gnat
any of various small biting flies: midges; biting midges; black flies; sand flies
 
gnatcatcher
very small North American and South American warblers
 
gnathostome
a vertebrate animal possessing true jaws
 
gnawer
relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing
 
gnawing mammal
relative large gnawing animals; distinguished from rodents by having two pairs of upper incisors specialized for gnawing
 
gnu
large African antelope having a head with horns like an ox and a long tufted tail
 
goat antelope
bovid related to goats but having antelope-like features: mountain goats; gorals; serows; chamois; gnu goats
 
gobbler
male turkey
 
Gobiesox strumosus
clingfish with typical skillet shape
 
Gobio gobio
small slender European freshwater fish often used as bait by anglers
 
goby
small spiny-finned fish of coastal or brackish waters having a large head and elongated tapering body having the ventral fins modified as a sucker
 
godwit
large wading bird that resembles a curlew; has a long slightly upturned bill
 
golden 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
 
goldeneye
a variety of green lacewing
 
gomphothere
extinct elephants of Central American and South America; of the Miocene and Pleistocene
 
Gonorhynchus gonorhynchus
fish of sandy areas of western Pacific and Indian oceans having an angular snout for burrowing into sand
 
goose
web-footed long-necked typically gregarious migratory aquatic birds usually larger and less aquatic than ducks
 
goose down
down of the goose
 
gopher
any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops
 
gopher
burrowing rodent of the family Geomyidae having large external cheek pouches; of Central America and southwestern North America
 
Gopherus agassizii
burrowing tortoise of the arid western United States and northern Mexico; may be reclassified as a member of genus Xerobates
 
Gopherus polypemus
burrowing edible land tortoise of southeastern North America
 
Gordon setter
a Scottish breed with a black-and-tan coat
 
gorgonian
corals having a horny or calcareous branching skeleton
 
Gorilla gorilla
largest anthropoid ape; terrestrial and vegetarian; of forests of central west Africa
 
Gorilla gorilla beringei
gorilla of Kivu highlands
 
Gorilla gorilla gorilla
a kind of gorilla
 
Gorilla gorilla grauri
a kind of gorilla
 
gosling
young goose
 
gracilariid
small dull or metallic-colored tineoid moths whose larvae mine in plant leaves
 
Gracula religiosa
glossy black Asiatic starling often taught to mimic speech
 
grade
a variety of cattle produced by crossbreeding with a superior breed
 
grain moth
moth whose larvae feed on grain
 
Grampus griseus
slaty-grey blunt-nosed dolphin common in northern seas
 
grass finch
usually brightly-colored Australian weaverbirds; often kept as cage birds
 
grass snake
either of two North American chiefly insectivorous snakes that are green in color
 
grasshopper mouse
insectivorous mouse of western North America
 
grasshopper
terrestrial plant-eating insect with hind legs adapted for leaping
 
gray hen
female black grouse
 
gray lemming
Old World lemming
 
gray mullet
freshwater or coastal food fishes a spindle-shaped body; found worldwide
 
gray
horse of a light gray or whitish color
 
great ape
any of the large anthropoid apes of the family Pongidae
 
Great Dane
very large powerful smooth-coated breed of dog
 
Great Pyrenees
bred of large heavy-coated white dogs resembling the Newfoundland
 
Greater Swiss Mountain dog
the largest of the four Swiss breeds
 
grebe
small compact-bodied almost completely aquatic bird that builds floating nests; similar to loons but smaller and with lobate rather than webbed feet
 
green 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
 
greenbottle
blowfly with brilliant coppery green body
 
greeneye
bottom-dwellers having large eyes with metallic green luster
 
greenfly
greenish aphid; pest on garden and crop plants
 
greenling
food fish of the northern Pacific
 
gregarine
vermiform protozoans parasitic in insects and other invertebrates
 
grenadier
deep-sea fish with a large head and body and long tapering tail
 
greyhound
a tall slender dog of an ancient breed noted for swiftness and keen sight; used as a racing dog
 
griffon
breed of medium-sized long-headed dogs with downy undercoat and harsh wiry outer coat; originated in Holland but largely developed in France
 
groenendael
black-coated sheepdog with a heavily plumed tail
 
grosbeak
any of various finches of Europe or America having a massive and powerful bill
 
ground roller
Madagascan roller with terrestrial and crepuscular habits that feeds on e.g. insects and worms
 
ground sloth
gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in America
 
ground-shaker
huge herbivorous dinosaur of the Cretaceous found in western North America
 
grouper
usually solitary bottom sea basses of warm seas
 
grouse
popular game bird having a plump body and feathered legs and feet
 
grub
a soft thick wormlike larva of certain beetles and other insects
 
grunt
medium-sized tropical marine food fishes that utter grunting sounds when caught
 
Grus americana
rare North American crane having black-and-white plumage and a trumpeting call
 
guan
any of several large turkey-like game birds of the family Cracidae; native to jungles of tropical America; resembling the curassows and valued as food
 
guard dog
a dog trained to guard property
 
guard hair
coarse hairs that form the outer fur and protect the underfur of certain mammals
 
guenon
small slender African monkey having long hind limbs and tail and long hair around the face
 
Guernsey
breed of dairy cattle from the island of Guernsey
 
guide dog
a dog trained to guide the blind
 
guillemot
small black or brown speckled auks of northern seas
 
guinea hen
female guinea fowl
 
guitarfish
primitive tropical bottom-dwelling ray with a guitar-shaped body
 
gull
mostly white aquatic bird having long pointed wings and short legs
 
Gulo gulo
musteline mammal of northern Eurasia
 
Gulo luscus
stocky shaggy-coated North American carnivorous mammal
 
gun dog
a dog trained to work with sportsmen when they hunt with guns
 
gurnard
bottom-dwelling coastal fishes with spiny armored heads and fingerlike pectoral fins used for crawling along the sea bottom
 
Gymnelis viridis
brightly colored scaleless Arctic eelpout
 
Gymnogyps californianus
North American condor; chiefly dull black; almost extinct
 
Gymnorhina tibicen
crow-sized black-and-white bird; a good mimic often caged
 
Gypaetus barbatus
the largest Eurasian bird of prey; having black feathers hanging around the bill
 
Gyps fulvus
large vulture of southern Europe and northern Africa having pale plumage with black wings
 
hack
a saddle horse used for transportation rather than sport etc.
 
hack
a horse kept for hire
 
hack
an old or over-worked horse
 
hackle
long slender feather on the necks of e.g. turkeys and pheasants
 
hackney
a compact breed of harness horse
 
Haematobia irritans
small black European fly introduced into North America; sucks blood from cattle especially at the base of the horn
 
haemoproteid
related to malaria parasite and having a phase in the viscera of various birds
 
haemosporidian
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
 
hag
eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies
 
hair
a filamentous projection or process on an organism
 
hairstreak
small butterflies having striped markings under the wings
 
hake
any of several marine food fishes related to cod
 
halcyon
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
 
halfbeak
tropical and subtropical marine and freshwater fishes having an elongated body and long protruding lower jaw
 
Haliaeetus leucocephalus
a large eagle of North America that has a white head and dark wings and body
 
Haliaeetus leucorhyphus
of southeast Europe and central Asia
 
Haliatus albicilla
bulky greyish-brown eagle with a short wedge-shaped white tail; of Europe and Greenland
 
halibut
marine food fish of the northern Atlantic or northern Pacific; the largest flatfish and one of the largest teleost fishes
 
Halicoeres bivittatus
small wrasse of tropical Atlantic
 
Halicoeres radiatus
bluish and bronze wrasse; found from Florida keys to Brazil
 
Haliotis tuberculata
an abalone found near the Channel Islands
 
halobacter
halophiles in saline environments such as the Dead Sea or salt flats
 
halophil
archaebacteria requiring a salt-rich environment for growth and survival
 
hammerhead
medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous
 
Hampshire down
British breed of hornless dark-faced domestic sheep
 
hamster
short-tailed Old World burrowing rodent with large cheek pouches
 
hand
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
 
haploid
(genetics) an organism or cell having only one complete set of chromosomes
 
haplosporidian
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
 
hare
swift timid long-eared mammal larger than a rabbit having a divided upper lip and long hind legs; young born furred and with open eyes
 
hare wallaby
small Australian wallaby that resembles a hare and has persistent teeth
 
harness horse
horse used for pulling vehicles
 
harnessed antelope
any of several antelopes of the genus Tragelaphus having striped markings resembling a harness
 
Harpia harpyja
large black-and-white crested eagle of tropical America
 
harpy
any of various fruit bats of the genus Nyctimene distinguished by nostrils drawn out into diverging tubes