Chipoo – Tiny, lively Chihuahua–Poodle mix.
Chipping Sparrow – Small streaked sparrow with a crisp trilling song.
Chiton – Oval marine grazer armored with eight shell plates.
Chiweenie – Playful Dachshund–Chihuahua cross with a long back.
Chorkie – Cheerful Chihuahua–Yorkshire Terrier mix.
Chow Chow – Lion-maned dog with a blue-black tongue.
Chow Pom – Fluffy Chow Chow–Pomeranian hybrid.
Chow Shepherd – Protective Chow Chow–German Shepherd mix.
Christmas Beetle – Shiny Australian scarab active in summer.
Christmas Island Red Crab – Land crab famous for mass red migrations.
Chromodoris willani – Blue-spotted nudibranch with white margins.
Chusky – Husky–Chow Chow mix, bold and loyal.
Cicada – Loud tree insect with years-long underground life.
Cichlid – Diverse freshwater fish known for parental care.
Cinereous Vulture – Huge dark vulture of Eurasian mountains.
Cinnamon Ball Python – Warm brown morph of the ball python.
Cinnamon Bear – Brown bear color phase with reddish coat.
Cinnamon Ferret – Domestic ferret with rich cinnamon fur.
Clark’s Grebe – Elegant diving bird with black cap and red eye.
Clearnose Skate – Bottom-dwelling ray with translucent snout.
Click Beetle – Snaps its body to flip upright when fallen.
Clock Spider – Colloquial term for large house spider behind clocks.
Clothes Moth – Tiny moth whose larvae chew wool and silk.
Clouded Leopard – Forest cat with cloud-like rosettes and long tail.
Clownfish – Orange reef fish that shelters in sea anemones.
Clumber Spaniel – Heavy, calm spaniel with long, low build.
Coachwhip Snake – Fast, slender racer that hunts in daylight.
Coastal Carpet Python – Large Australian constrictor with bold pattern.
Coastal Taipan – Extremely venomous Australian snake of coasts.
Coati – Ring-tailed, long-nosed raccoon relative of the tropics.
Cobalt Blue Tarantula – Striking blue burrower from Southeast Asia.
Cobia Fish – Powerful pelagic fish nicknamed “black kingfish.”
Cobras – Hooded venomous snakes famed for threat displays.
Cochin Chicken – Giant, feather-footed chicken with gentle nature.
Cockalier – Cocker Spaniel–Cavalier mix, sweet and cuddly.
Cockapoo – Friendly Cocker Spaniel–Poodle hybrid, low-shedding.
Cockatiel – Whistling pet cockatoo with bright cheek patches.
Cockatoo – Crest-topped parrot known for intelligence and noise.
Cocker Spaniel – Silky-eared bird dog turned loving companion.
Cockle – Small bivalve that burrows in sandy shores.
Cockroach – Tough scavenging insect adapted to human homes.
Coconut Crab – Giant land crab that can crack coconuts.
Codfish – Cold-water fish prized for mild, flaky meat.
Codling Moth – Orchard pest whose larvae tunnel apples.
Coelacanth – “Living fossil” lobed-finned deep-sea fish.
Collared Peccary – Piglike desert forager with a neck band.
Collett’s Snake – Bright Australian elapid with strong venom.
Collie – Elegant herding dog renowned for trainability.
Collie Mix – Crossbreed carrying the Collie’s smarts and grace.
Colossal Squid – Deep-sea giant with hooks on its tentacles.
Comb Jellyfish – Gelatinous swimmer shimmering with rainbow cilia.
Comb-crested Jacana – Red-combed “lily-walker” of Australasian wetlands.
Comet Moth – Huge Madagascan moth with long tail streamers.
Comfort Retriever – Golden Retriever–Cocker mix bred as a companion.
Common Buzzard – Versatile European raptor with mewing call.
Common Carp – Hardy, omnivorous fish with barbels.
Common European Adder – Widespread European viper with zigzag back.
Common Frog – Familiar pond frog that hibernates in mud.
Common Furniture Beetle – Wood-borer causing fine exit holes in timbers.
Common Goldeneye – Diving duck with bright yellow eyes.
Common Grackle – Iridescent blackbird with piercing stare.
Common Green Magpie – Emerald-green corvid with red bill.
Common House Spider – Web spinner of corners and basements.
Common Loon – Black-and-white diver with haunting yodel.
Common Raven – Large, clever corvid with deep croak.
Common Spotted Cuscus – Slow, spotted possum of Australasian forests.
Common Toad – Warty amphibian with toxic skin glands.
Common Yellowthroat – Masked warbler that sings “witchety-witchety.”
Compsognathus – Chicken-sized, swift Jurassic dinosaur.
Cone Snail – Beautiful shell, venomous harpoon-tongue.
Conger Eel – Large, nocturnal marine eel hiding in crevices.
Congo Snake – Name used for several African snakes; often aquatic species.
Conure – Small, talkative New World parrot.
Cookiecutter Shark – Small shark that carves neat plugs of flesh.
Cooper’s Hawk – Forest hawk that threads through trees after birds.
Copperhead – Venomous North American pit viper with copper bands.
Coral – Colonial animals that build reefs from limestone.
Coral Snake – Brightly banded elapid with potent neurotoxin.
Corella – Small white cockatoo with pink wash on face.
Corgidor – Corgi–Labrador mix: low, friendly, and eager.
Corgipoo – Corgi–Poodle hybrid, smart and social.
Corkie – Corgi–Yorkshire Terrier mix, tiny herder at heart.
Corman Shepherd – Corgi–German Shepherd cross, short but driven.
Cormorant – Dark diving bird that dries wings on rocks.
Corn Earworm – Crop moth larva that bores into ears of corn.
Corn Rex Cat (Cornish Rex) – Curly-coated cat with huge ears and sprinty gait.
Corn Snake – Calm, colorful constrictor popular with beginners.
Cory Catfish – Peaceful bottom-cleaning aquarium catfish.
Coryphodon – Hippo-like Paleocene herbivore with pillar teeth.
Cosmic Caterpillar – Nickname for brilliantly patterned moth larvae.
Costa’s Hummingbird – Tiny desert hummer with purple flare.
Coton de Tulear – Velvety white companion dog from Madagascar.
Cotton-top Tamarin – Small monkey with a wild white crest.
Cottonmouth – Venomous semi-aquatic pit viper, the water moccasin.
Coues Deer – Small desert whitetail subspecies of the Southwest.
Cougar – Stealthy North American big cat, also called puma.
Cow – Domestic cattle; key source of milk and beef.
Cow Reticulated Python – High-contrast white-and-brown python morph.
Coyote – Adaptable wild canid thriving near people.
Cabbage Moth – Garden pest whose caterpillars eat brassicas.
Cactus Moth – Species introduced to control invasive prickly pears.
Cactus Mouse – Small desert rodent storing seeds in burrows.
Cactus Wren – Large wren that nests in spiny cacti.
Caecilian – Limbless, burrowing amphibian with ringed body.
Caiman – Small crocodilian of Central and South America.
Caiman Lizard – Semi-aquatic lizard that cracks snails with heavy jaws.
Cairn Terrier – Hardy Scottish terrier from rocky cairns.
California Condor – Enormous endangered vulture rebounding from extinction.
California Kingsnake – Boldly banded snake that eats other snakes.
California Tarantula – Gentle, brown tarantula of oak foothills.
Camel – Desert traveler with humps for fat storage.
Camel Cricket – Long-legged, hump-backed cave and basement insect.
Camel Spider – Fast desert arachnid, all bluff and no venom.
Campine Chicken – Belgian layer with metallic sheen.
Canaan Dog – Ancient desert herder turned vigilant companion.
Canada Lynx – Snowshoe-footed cat of northern forests.
Canada Warbler – Bright warbler with necklace of streaks.
Canadian Eskimo Dog – Powerful Arctic sled dog with thick coat.
Canadian Horse – Compact, hardy Canadian riding and driving breed.
Cane Corso – Muscular Italian mastiff and property guardian.
Cane Rat – Chunky African rodent farmed for meat.
Cane Spider – Large house spider common in the tropics.
Cantil – Venomous Mexican pit viper with bold pattern.
Canvasback – Sleek diving duck with sloping profile.
Cape Lion – Extinct South African lion population.
Capuchin – Clever New World monkey known for tool use.
Capybara – World’s largest rodent; social semi-aquatic grazer.
Caracal – Lynx-like cat with dramatic black ear tufts.
Cardinal – Red songbird; males blaze, females warm brown.
Caribbean Reef Shark – Stocky coral-reef shark of tropical Atlantic.
Caribou – Migratory reindeer of the Arctic tundra.
Carolina Dog – Free-ranging American dingo-type dog.
Carolina Parakeet – Extinct North American parrot once common in swamps.
Carp – Hardy omnivorous fish with worldwide introductions.
Carpenter Ant – Large ant that hollows damp wood for nests.
Carpet Beetle – Tiny home pest whose larvae eat fabrics.
Carpet Python – Patterned Australian constrictor in many morphs.
Carpet Viper – Small African viper with dangerous hemotoxic venom.
Carrion Beetle – Scavenger beetle that recycles animal remains.
Cascabel – Spanish name for rattlesnakes of Latin America.
Cashmere Goat – Source of luxurious cashmere fiber.
Cassowary – Powerful flightless bird with dagger-like claw.
Cat – Agile, independent carnivore and beloved pet.
Cat Snake – Rear-fanged tree snake with vertical pupils.
Cat-Eyed Snake – Slim, mildly venomous snake with slit pupils.
Cat-Faced Spider – Orb-weaver with a “cat face” abdomen.
Catahoula Bulldog – Catahoula–Bulldog cross, strong and driven.
Catahoula Leopard – Spotted Louisiana herding dog with glassy eyes.
Catalan Sheepdog – Shaggy Spanish herder, steady and bright.
Caterpillar – Plant-eating larval stage of butterflies and moths.
Catfish – Whiskered bottom fish, many species worldwide.
Caucasian Mountain Dog (Shepherd) – Huge Caucasus guardian against predators.
Caucasian Shepherd – Same mighty livestock guardian; protective and bold.
Cava Tzu – Cavalier–Shih Tzu mix, sweet lap companion.
Cavador – Labrador–Cavalier mix, gentle and family-friendly.
Cavalier King Charles Spaniel – Affectionate toy spaniel with silky ears.
Cavapoo – Cavalier–Poodle mix, cuddly and low-shedding.
Cave Bear – Massive Ice Age bear known from caves.
Cave Lion – Extinct Pleistocene lion of Eurasia.
Cecropia Moth – North America’s largest silkmoth with red bands.
Cedar Waxwing – Sleek tan bird with a black mask and berry diet.
Centipede – Many-legged predator with venomous first pair of legs.
Central Ranges Taipan – Rare inland Australian snake with potent venom.
Cephalaspis – Primitive armored fish from the Devonian.
Ceratopsian – Horned, frilled herbivorous dinosaurs like Triceratops.
Ceratosaurus – Horn-nosed Jurassic predator with blade-like teeth.
Cervalces latifrons (Broad-Fronted Moose) – Giant prehistoric moose with wide antlers.
Cesky Fousek – Bearded Czech gundog, versatile in the field.
Cesky Terrier – Low, long Czech terrier with silky coat.
Chain Pickerel – Slender gamefish with chainlike sides.
Chameleon – Color-changing lizard with turret eyes and sticky tongue.
Chamois – Sure-footed mountain goat-antelope of Europe.
Chartreux – Quiet blue-gray cat with copper eyes.
Cheagle – Chihuahua–Beagle mix, compact and spirited.
Checkered Garter Snake – Green-checkered, harmless garden snake.
Cheetah – Fastest land animal, built for sprinting.
Chesapeake Bay Retriever – Rugged water retriever with oily coat.
Chestnut-Sided Warbler – Tiny songbird with chestnut flanks and buzzy song.
Chi Chi – Chihuahua–Chinese Crested mix, tiny and alert.
Chickadee – Friendly black-capped backyard acrobat.
Chicken – Domesticated fowl for meat and eggs.
Chicken Snake – Colloquial name for several nonvenomous rat snakes.
Chigger – Mite larva that causes itchy red welts.
Chihuahua – Toy dog with big attitude in a tiny frame.
Chihuahua Mix – Any small-breed blend with Chihuahua sass.
Children’s Python – Small, tame Australian python species.
Chilean Recluse Spider – Venomous recluse with necrotic bite.
Chilean Rose Tarantula – Calm pet tarantula with rosy hue.
Chilesaurus – Odd plant-eating theropod with mixed traits.
Chimaera – Deep-sea “ghost shark” with cartilaginous skeleton.
Chimpanzee – Intelligent great ape using tools and complex communication.
Chinchilla – Soft-furred Andean rodent active at night.
Chinese Alligator – Small, critically endangered crocodilian of China.
Chinese Cobra – Asian cobra with spectacled hood mark.
Chinese Crested Dog – Hairless toy breed with flowing crest.
Chinese Geese – Knobbed domestic goose, alert and vocal.
Chinese Paddlefish – Giant Yangtze fish, likely extinct.
Chinese Shar-Pei – Wrinkled dog with blue-black tongue.
Chinese Water Deer – Tusked deer without antlers, marsh specialist.
Chinook – Rare sled dog breed from the U.S.
Chinook Salmon – King salmon, largest Pacific salmon species.
Chinstrap Penguin – Black chinstrap stripe on a snowy face.
Chipit – Chihuahua–Pit Bull mix, compact and bold.
Chipmunk – Striped ground squirrel that hoards seeds in cheeks.
Crab – Wide-bodied crustacean with sideways scuttle.
Crab Spider – Ambush hunter that grabs prey on flowers.
Crab-Eating Fox – Omnivorous South American canid of wetlands.
Crab-Eating Macaque – Coastal monkey adept at raiding shorelines.
Crabeater Seal – Antarctic seal that filters krill with sieve-like teeth.
Crane – Tall wader with bugling calls and long migrations.
Crappie Fish – Popular North American panfish, black or white.
Crayfish – Freshwater “mini-lobster” living under rocks.
Crested Gecko – Sticky-toed gecko with eyelash-like crests.
Crested Penguin – Group of penguins with yellow head plumes.
Cricket – Chirping night insect rubbing wings together.
Croatian Sheepdog – Nimble black herding dog from Croatia.
Crocodile – Large armored reptile with powerful jaws.
Crocodile Monitor – Enormous tree-dwelling monitor of New Guinea.
Crocodile Shark – Small swift shark with big eyes.
Crocodylomorph – Broad group including crocodiles and their ancestors.
Cross Fox – Red fox color morph with dark cross on back.
Cross River Gorilla – Rare, critically endangered gorilla subspecies.
Crow – Smart black bird known for problem-solving.
Crucian Carp – Hardy European carp of ponds and marshes.
Cryolophosaurus – Crested Antarctic theropod from the Early Jurassic.
Cuban Boa – Large Cuban constrictor that climbs and swims.
Cuban Cockroach – Green tree-dwelling roach sometimes kept as a pet.
Cubera Snapper – Massive reef snapper with crushing bite.
Cuckoo – Brood parasite that lays eggs in other birds’ nests.
Cucumber Beetle – Striped garden beetle that damages cucurbits.
Curly Coated Retriever – Water-loving retriever with tight curls.
Curly Hair Tarantula – Gentle brown tarantula with curly setae.
Cuttlefish – Smart cephalopod that flashes patterns and camouflages.
Czechoslovakian Wolfdog – Wolf–German Shepherd hybrid breed: athletic and alert.