Calandrella, Genus
Calcarius, Genus
Calidris, Genus
Calonectris, Genus
Caprimulgidae, Familia
Caprimulgiformes, Ordo
Caprimulgus, Genus
Carduelis, Genus
Carpodacus, Genus
Cepphus, Genus
Cercotrichas, Genus
Certhia, Genus
Certhiidae, Familia
Cettia, Genus
Charadriidae, Familia
Charadriiformes, Ordo
Charadrius, Genus
Chersophilus, Genus
Chlidonias, Genus
Chordata, Phylum
Ciconia, Genus
Ciconiidae, Familia
Ciconiiformes, Ordo
Cinclidae, Familia
Cinclus, Genus
Circaetus, Genus
Circus, Genus
Cisticola, Genus
Cisticolidae, Familia
Clamator, Genus
Clangula, Genus
Coccothraustes, Genus
Columba, Genus
Columbidae, Familia
Columbiformes, Ordo
Coracias, Genus
Coraciidae, Familia
Coraciiformes, Ordo
Corvidae, Familia
Corvus, Genus
Coturnix, Genus
Crex, Genus
Cuculidae, Familia
Cuculiformes, Ordo
Cuculus, Genus
Cyanopica, Genus
Cygnus, Genus