Animals
Articles about animal species, behavior and classification.
Classification
Claw
Cleaner fish
Cleaner fish: mutualistic cleaners of reefs and freshwater habitats
Cleaner shrimp
Clever Hans
Clever Hans — the horse that revealed the observer-expectancy effect
Click beetle
Click beetle (Elateridae): appearance, behavior and human relevance
Climacoceratidae
Climacoceratidae — extinct giraffoid artiodactyls of the Miocene
Clouded leopard
Clouded leopard (Neofelis nebulosa): description, behavior, and conservation
Clownfish
Clupeidae
Clupeidae: herrings, shads, sardines and related fishes
Cnidaria
Cnidaria: overview of jellyfish, corals, sea anemones and related animals
Coastal Range newt
Coat (dog)
Dog coat
Cobra
Cobra: hooded venomous snakes, biology, behaviour and human interactions
Coccinella septempunctata
Coccinella septempunctata — the seven-spot ladybird
Cockapoo
Cockapoo: origin, traits, care, and commonly seen varieties
Cockatiel
Cockatiel (Nymphicus hollandicus): Overview, Care, and Behavior
Cockatoo
Cockatoo — overview, characteristics, taxonomy, and human interactions
Cockatoos are a group of parrots (family Cacatuidae) native to Australasia, known for expressive crests, strong curved bills, social behaviour, and long associations with people as
Cocker Spaniel
Cocker Spaniel — English and American breeds
Cockle
Cockroach
Coconut crab
Coconut crab (Birgus latro) — the largest land-dwelling crustacean
Cod
Atlantic cod (Gadus morhua): biology, fisheries, and uses
Coelacanth
Coelacanth: the lobe‑finned 'living fossil' fish
Coelacanths are ancient lobe‑finned fishes with a deep fossil record. Rediscovered alive in 1938, two living species persist in deep waters; they are important to studies of verteb
Coelophysis
Coelurosauria
Coelurus
Coelurus — small Late Jurassic hollow-boned theropod
Coenobitidae
Coenobitidae: family of land hermit crabs
Coleoidea
Coleoidea — the modern shell‑less cephalopods
Coleoidea is the cephalopod subgroup that includes octopuses, squids and cuttlefish, distinguished by reduced or internal shells, advanced nervous systems, and diverse marine ecolo
Collective animal behaviour
Colo (gorilla)
Colo — the first gorilla born in captivity and a zoo icon
Colobinae
Colobinae: the leaf‑eating Old World monkey subfamily
Coloborhynchus
Coloborhynchus — a toothed, crested pterosaur of the Lower Cretaceous
Colobus
Colobus: African leaf-eating monkeys of the genus Colobus
Colorado potato beetle
Colorado potato beetle (Leptinotarsa decemlineata)
Colossal squid
Colossal squid (Mesonychoteuthis hamiltoni)
Colourpoint
Colubrid
Colubrid (Colubridae): overview, traits and significance
Colugo
Columbian mammoth
Columbiformes
Common barn owl
Common basilisk
Common bronzewing
Common bronzewing (Phaps chalcoptera)
Common buzzard
Common buzzard (Buteo buteo)
Common collared lizard
Common collared lizard (Crotaphytus collaris)
Common coquí
Common coquí (Eleutherodactylus coqui)
Common crane
Common crane (Grus grus) — Eurasian crane