- Canada Goose
- Canada Jay
- Canada Warbler
- Canivet's Emerald
- Cape Barren Goose
- Cape Cormorant
- Cape Grassbird
- Cape Sparrow
- Cape Starling
- Cape Wagtail
- Cape White-eye
- Carrion Crow
- Cave Swallow
- Chami Antpitta
- Chestnut-capped Brushfinch
- Chestnut-crowned Antpitta
- Chestnut-naped Antpitta
- Chinspot Batis
- Chipping Sparrow
- Chivi Vireo
- Choco Brushfinch
- Cinereous Vulture
- Cinnamon-bellied Saltator
- Cinnamon Attila
- Cinnamon Flycatcher
- Cirl Bunting
- Citril Finch
- Clay-colored Thrush
- Cocoa Thrush
- Cocoa Woodcreeper
- Cocoi Heron
- Coconut Lorikeet
- Collared Aracari
- Collared Inca
- Collared Sunbird
- Colombian Chachalaca
- Common Blackbird
- Common Bulbul (tricolor)
- Common Buzzard
- Common Cactus Finch
- Common Chiffchaff
- Common Chlorospingus
- Common Crane
- Common Eider
- Common Gallinule
- Common Greenshank
- Common Gull
- Common Kestrel
- Common Kingfisher
- Common Linnet
- Common Moorhen
- Common Myna
- Common Nightingale
- Common Ostrich
- Common Pheasant
- Common Pochard
- Common Potoo
- Common Redshank
- Common Redstart
- Common Reed Bunting
- Common Reed Warbler
- Common Ringed Plover
- Common Sandpiper
- Common Shelduck
- Common Snipe
- Common Starling
- Common Swift
- Common Tern
- Common Tody-Flycatcher
- Common Waxbill
- Common Whitethroat
- Coppery-headed Emerald
- Corn Bunting
- Crescent-faced Antpitta
- Crested Barbet
- Crested Caracara (cheriway)
- Crested Francolin
- Crested Guan
- Crested Lark
- Crested Pigeon
- Crimson-backed Tanager
- Crimson-breasted Shrike
- Crimson-crested Woodpecker
- Crimson-mantled Woodpecker
- Crimson-rumped Toucanet
- Crimson Rosella
- Crowned Lapwing
- Crowned Woodnymph