- Cabanis's Bunting
- Calandra Lark
- Cameroon Greenbul
- Cameroon Olive Pigeon
- Cameroon Sunbird
- Canada Jay
- Carmelite Sunbird
- Carrion Crow
- Caspian Gull
- Caspian Tern
- Cassin's Flycatcher
- Cassin's Hawk-Eagle
- Cassin's Malimbe
- Cassin's Spinetail
- Chattering Cisticola
- Chestnut-sided Warbler
- Chinese Bamboo Partridge
- Chubb's Cisticola (discolor)
- Coal Tit
- Collared Bush Robin
- Collared Pratincole
- Common Blackbird
- Common Bulbul
- Common Chiffchaff
- Common Eider
- Common Goldeneye
- Common Grasshopper Warbler
- Common Greenshank
- Common Gull
- Common Linnet
- Common Redstart
- Common Ringed Plover
- Common Snipe
- Common Tern
- Common Whitethroat
- Common Wood Pigeon
- Compact Weaver
- Congo Pied Hornbill
- Copper Sunbird
- Crested Goshawk
- Crested Honey Buzzard
- Crested Lark
- Crested Tit
- Crowned Eagle
- Curlew Sandpiper