- Calandra Lark
- Canada Goose
- Carrion Crow
- Caspian Gull
- Cetti's Warbler
- Citrine Wagtail
- Coal Tit
- Collared Inca
- Collared Pratincole
- Common Buzzard
- Common Chiffchaff
- Common Cuckoo
- Common Eider
- Common Goldeneye
- Common Gull
- Common Kestrel
- Common Kingfisher
- Common Linnet
- Common Loon
- Common Merganser
- Common Moorhen
- Common Murre
- Common Nightingale
- Common Pochard
- Common Redshank
- Common Redstart
- Common Reed Bunting
- Common Ringed Plover
- Common Sandpiper
- Common Snipe
- Common Starling
- Common Tern
- Common Whitethroat
- Corn Bunting
- Cream-winged Cinclodes
- Curlew Sandpiper