- California Quail
- California Scrub Jay
- Canada Goose
- Canada Jay
- Carib Grackle
- Caribbean Martin
- Carrion Crow
- Caspian Tern
- Cassin's Finch
- Cedar Waxwing
- Chestnut-backed Chickadee
- Chestnut-breasted Mannikin
- Chimney Swift
- Chipping Sparrow
- Chukar Partridge
- Cinnamon Teal
- Cirl Bunting
- Clark's Grebe
- Clark's Nutcracker
- Coal Tit
- Common Blackbird
- Common Bulbul
- Common Buzzard
- Common Crane
- Common Cuckoo
- Common Eider
- Common Firecrest
- Common Goldeneye
- Common Grackle
- Common Gull
- Common Kestrel
- Common Kingfisher
- Common Linnet
- Common Loon
- Common Merganser
- Common Moorhen
- Common Murre
- Common Myna
- Common Nighthawk
- Common Pheasant
- Common Pochard
- Common Redpoll
- Common Redshank
- Common Redstart
- Common Reed Bunting
- Common Ringed Plover
- Common Sandpiper
- Common Scoter
- Common Shelduck
- Common Snipe
- Common Starling
- Common Swift
- Common Tern
- Common Waxbill
- Common Whitethroat
- Common Yellowthroat
- Corn Bunting
- Crested Tit
- Curlew Sandpiper