- California Quail
- Canada Goose
- Cape Barren Goose
- Cape Bulbul
- Cape Gannet
- Cape Starling
- Cardinal Quelea
- Cardinal Woodpecker
- Chestnut-banded Plover
- Chestnut-bellied Sandgrouse
- Chestnut-fronted Helmetshrike
- Chestnut-sided Warbler
- Chestnut-vented Warbler
- Chilean Skua
- Chilean Swallow
- Chilean Tinamou
- Chiloe Wigeon
- Chimango Caracara
- Chinspot Batis
- Cinnamon-chested Bee-eater
- Cirl Bunting
- Clay-colored Thrush
- Coconut Lorikeet
- Collared Aracari
- Collared Trogon
- Collared Whitestart
- Common Blackbird
- Common Cactus Finch
- Common Cuckoo
- Common Eider
- Common Greenshank
- Common Gull
- Common Kestrel
- Common Linnet
- Common Merganser
- Common Moorhen
- Common Murre
- Common Ostrich
- Common Potoo
- Common Ringed Plover
- Common Sandpiper
- Common Scimitarbill
- Common Tern
- Common Waxbill
- Coppery-headed Emerald
- Crested Duck
- Crested Francolin
- Crimson-breasted Shrike
- Crimson Rosella
- Crowned Lapwing
- Curlew Sandpiper