- Cape Crow
- Cape Teal
- Capped Wheatear
- Cardinal Woodpecker
- Carib Grackle
- Caspian Tern
- Chabert Vanga
- Channel-billed Toucan
- Chestnut-bellied Seedeater
- Chestnut Woodpecker
- Cinnamon-breasted Bunting
- Cinnamon-throated Woodcreeper
- Coal Tit
- Cocoi Heron
- Collared Nightjar
- Collared Plover
- Collared Pratincole
- Collared Sunbird
- Common Buzzard
- Common Chiffchaff
- Common Crane
- Common Firecrest
- Common Greenshank
- Common Ground Dove
- Common Kestrel
- Common Newtonia
- Common Ostrich
- Common Reed Bunting
- Common Reed Warbler
- Common Ringed Plover
- Common Sandpiper
- Common Shelduck
- Common Snipe
- Common Starling
- Common Tern
- Common Tody-Flycatcher
- Comoro Blue Pigeon
- Comoro Fody
- Comoro Olive Pigeon
- Coquerel's Coua
- Corn Bunting
- Crab-plover
- Crane Hawk
- Cream-colored Woodpecker
- Crested Caracara
- Crested Coua
- Crested Drongo
- Crested Francolin
- Crested Oropendola
- Crested Tit
- Crimson-crested Woodpecker
- Crowned Lapwing
- Cuckoo-roller