- Campo Flicker
- Canada Goose
- Capped Heron
- Chaco Chachalaca
- Changeable Hawk-Eagle
- Chinstrap Penguin
- Cinereous Vulture
- Citrine Wagtail
- Cocoi Heron
- Collared Pratincole
- Common Crane
- Common Goldeneye
- Common Kestrel
- Common Linnet
- Common Myna
- Common Ostrich
- Common Pochard
- Common Redshank
- Common Redstart
- Common Ringed Plover
- Common Sandpiper
- Common Shelduck
- Common Snipe
- Common Starling
- Common Tern
- Common Whitethroat
- Common Wood Pigeon
- Coppersmith Barbet
- Coppery-tailed Coucal
- Coqui Francolin
- Corn Bunting
- Cory's Shearwater
- Crested Caracara
- Crested Duck
- Crested Lark
- Crested Serpent Eagle
- Crowned Lapwing