- Calandra Lark
- California Quail
- Canada Goose
- Canada Warbler
- Canary Islands Stonechat
- Cape Barren Goose
- Cape Crow
- Cape Eagle-Owl
- Cape May Warbler
- Cape Teal
- Carrion Crow
- Caspian Tern
- Cedar Waxwing
- Cetti's Warbler
- Chestnut-breasted Mannikin
- Chestnut-naped Francolin
- Chestnut-sided Warbler
- Chestnut Sparrow
- Chestnut Teal
- Chipping Sparrow
- Cinereous Vulture
- Cinnamon-breasted Bunting
- Cirl Bunting
- Citril Finch
- Cloven-feathered Dove
- Coal Tit
- Coconut Lorikeet
- Collared Pratincole
- Common Blackbird
- Common Bulbul
- Common Buzzard
- Common Chaffinch
- Common Chiffchaff
- Common Crane
- Common Cuckoo
- Common Eider
- Common Firecrest
- Common Goldeneye
- Common Grackle
- Common Greenshank
- Common House Martin
- Common Kestrel
- Common Kingfisher
- Common Linnet
- Common Loon
- Common Merganser
- Common Moorhen
- Common Murre
- Common Myna
- Common Nightingale
- Common Pochard
- Common Redpoll
- Common Redshank
- Common Redstart
- Common Reed Bunting
- Common Ringed Plover
- Common Rock Thrush
- Common Sandpiper
- Common Shelduck
- Common Snipe
- Common Starling
- Common Swift
- Common Tern
- Common Waxbill
- Common Whitethroat
- Common Wood Pigeon
- Common Yellowthroat
- Corn Bunting
- Cream-colored Courser
- Crescent Honeyeater
- Crested Francolin
- Crested Lark
- Crowned Lapwing
- Curlew Sandpiper
- Cut-throat Finch