- Canada Goose
- Cape Crow
- Cape Gannet
- Cape Robin-Chat
- Cape Sparrow
- Cape Starling
- Cape Teal
- Cape Vulture
- Cape Wagtail
- Capped Wheatear
- Cardinal Woodpecker
- Cetti's Warbler
- Chat Flycatcher
- Chestnut-vented Warbler
- Chiloe Wigeon
- Chinspot Batis
- Cinnamon-breasted Bunting
- Collared Pratincole
- Collared Sunbird
- Common Chaffinch
- Common Crane
- Common Goldeneye
- Common Linnet
- Common Murre
- Common Nightingale
- Common Ostrich
- Common Pochard
- Common Scimitarbill
- Common Snipe
- Coqui Francolin
- Corn Bunting
- Crested Barbet
- Crested Francolin
- Crested Guineafowl
- Crested Lark
- Crimson-breasted Shrike
- Crowned Hornbill
- Crowned Lapwing
- Cut-throat Finch