- Carrion Crow
- Caspian Gull
- Caspian Tern
- Chestnut-sided Warbler
- Cirl Bunting
- Citril Finch
- Citrine Wagtail
- Coal Tit
- Common Chiffchaff
- Common Chiffchaff (tristis)
- Common Crane
- Common Firecrest
- Common Goldeneye
- Common Gull
- Common Kingfisher
- Common Linnet
- Common Moorhen
- Common Redshank
- Common Redstart
- Common Ringed Plover
- Common Snipe
- Common Starling
- Common Swift
- Common Tern
- Common Wood Pigeon
- Corn Bunting
- Corsican Finch
- Crested Tit