- Calandra Lark
- Cetti's Warbler
- Cinereous Bunting
- Cinereous Vulture
- Cirl Bunting
- Citrine Wagtail
- Common Blackbird
- Common Buzzard (vulpinus)
- Common Crane
- Common Cuckoo
- Common Kestrel
- Common Kingfisher
- Common Pheasant
- Common Quail
- Common Reed Bunting
- Common Ringed Plover
- Common Rock Thrush
- Common Shelduck
- Common Snipe
- Common Starling
- Common Whitethroat
- Common Wood Pigeon
- Corn Bunting
- Cream-colored Courser
- Crested Tit
- Cretzschmar's Bunting
- Curlew Sandpiper