- Canada Goose
- Cape Barren Goose
- Cape Teal
- Capuchinbird
- Carmiol's Tanager
- Channel-billed Toucan (ariel)
- Chattering Lory
- Chestnut-backed Scimitar Babbler
- Chestnut-tailed Starling
- Chestnut Teal
- Chiloe Wigeon
- Chinese Hwamei
- Chinese Pond Heron
- Cinnamon Teal
- Cockatiel
- Collared Kingfisher
- Collared Whitestart
- Common Buzzard
- Common Chaffinch
- Common Chiffchaff
- Common Eider
- Common Emerald Dove
- Common Goldeneye
- Common Greenshank
- Common Ground Dove
- Common Hill Myna
- Common Iora
- Common Kestrel
- Common Kingfisher
- Common Linnet
- Common Moorhen
- Common Pheasant
- Common Pochard
- Common Ringed Plover
- Common Shelduck
- Common Starling
- Common Tody-Flycatcher
- Copper Sunbird
- Coppery-headed Emerald
- Coscoroba Swan
- Crested Duck
- Crested Fireback
- Crested Guineafowl
- Crested Myna
- Crested Partridge
- Crested Pigeon
- Crestless Fireback
- Crimson Rosella
- Croaking Ground Dove
- Crow-billed Drongo
- Curl-crested Aracari