- Camelidae
- Canidae
- Canis
- Canis aureus
- Canis domesticus
- Canis latrans
- Canis lupus
- Capra
- Capra aegagrus
- Capra ibex ibex
- Capreolus capreolus
- Caprimulgidae
- Caprimulgiformes
- Caprimulgus
- Caprimulgus aegyptus
- Caprimulgus europaeus
- Caprinae
- Caradriidae
- Carduelis
- Carduelis carduelis
- Carduelis chloris
- Carduelis spinus
- Carnivora
- Castor
- Castor fiber
- Castor canadensisidae
- Castoridae
- Cebidae
- Cebinae
- Cepphus grylle
- Certhia familiaris
- Certhiidae
- Cervidae
- Cervus
- Cervus elaphus
- Cervus nippon
- Cetacea
- Chamaeleonidae
- Chamaäleons
- Charadriidae
- Charadriiformes
- Charadrius
- Charadrius dubius
- Charadrius hiaticula
- Cheirogaleidae
- Chelonia
- Chimaera
- Chimaera monstrosa
- Chimaeriformes
- Chiroptera
- Choeropsis liberiensis
- Chondrichthyes
- Chondrophyton viridis
- Chordata
- Chordatiere
- Ciconia
- Ciconia ciconia
- Ciconia nigra
- Ciconiiformes
- Cinclidae
- Cinclus cinclus
- Circus
- Circus aeruginosus
- Circus cyanaeus
- Circus pygargus
- Citellus citellus
- Clethrionomys glareolus
- Coccothraustes coccothraustes
- Colubridae
- Columba
- Columba livia
- Columba oenas
- Columba palumbus
- Columbidae
- Coracias garrulus
- Coraciidae
- Coraciiformes
- Coronella austriaca
- Coturnix coturnix
- Corvidae
- Corvus corax
- Corvus corone cornix
- Corvus corone corone
- Corvus corone sardonius
- Corvus monedula
- Corvus frugilegus
- Cricetidae
- Cricetus cricetus
- Crocidura
- Crocidura leucon
- Crocidura russula
- Crocidura suaveolens
- Crocolydidae
- Cuculidae
- Cuculiformes
- Cuculus canorus
- Cygninae
- Cygnus
- Cygnus cygnus
- Cygnus bewickii
- Cygnus olor
- Cyclostomata
- Cynocephalidae
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