- Canada Goose
- Carib Grackle
- Caribbean Elaenia
- Carrion Crow
- Cetti's Warbler
- Cinereous Vulture
- Cirl Bunting
- Coal Tit
- Common Blackbird
- Common Buzzard
- Common Chiffchaff
- Common Crane
- Common Cuckoo
- Common Eider
- Common Firecrest
- Common Gallinule
- Common Goldeneye
- Common Greenshank
- Common Ground Dove
- Common Gull
- Common Kestrel
- Common Kestrel (canariensis)
- Common Kingfisher
- Common Linnet
- Common Loon
- Common Merganser
- Common Moorhen
- Common Murre
- Common Nightingale
- Common Pheasant
- Common Pochard
- Common Redpoll
- Common Redshank
- Common Redstart
- Common Reed Bunting
- Common Reed Warbler
- Common Ringed Plover
- Common Sandpiper
- Common Scoter
- Common Shelduck
- Common Snipe
- Common Starling
- Common Swift
- Common Tern
- Common Waxbill
- Common Whitethroat
- Common Wood Pigeon
- Corn Bunting
- Cory's Shearwater
- Cream-colored Courser
- Crested Lark
- Crested Tit
- Curlew Sandpiper