- Campo Flicker
- Canada Goose
- Canada Jay
- Capped Heron
- Cardinal Woodpecker
- Cauca Guan
- Cetti's Warbler
- Chabert Vanga
- Chaco Chachalaca
- Chalk-browed Mockingbird
- Changeable Hawk-Eagle
- Chestnut-backed Antbird
- Chestnut-backed Chickadee
- Chestnut-backed Owlet
- Chestnut-bellied Flowerpiercer
- Chestnut-bellied Nuthatch
- Chestnut-bellied Rock Thrush
- Chestnut-capped Brushfinch
- Chestnut-capped Warbler
- Chestnut-crowned Antpitta
- Chestnut-eared Aracari
- Chestnut-headed Bee-eater
- Chestnut-headed Oropendola
- Chestnut-sided Warbler
- Chestnut-tailed Starling
- Chestnut Wood Quail
- Cinereous Tit
- Cinereous Vulture
- Cinnamon Becard
- Cinnamon Flycatcher
- Cinnamon Woodpecker
- Cirl Bunting
- Citrine Wagtail
- Clark's Nutcracker
- Clay-colored Thrush
- Coal Tit
- Cocoa Woodcreeper
- Cocoi Heron
- Collared Aracari
- Collared Inca
- Collared Pratincole
- Collared Trogon
- Colombian Chachalaca
- Common Black Hawk
- Common Blackbird
- Common Chiffchaff
- Common Chlorospingus
- Common Crane
- Common Eider
- Common Emerald Dove
- Common Gallinule
- Common Goldeneye
- Common Greenshank
- Common Hill Myna
- Common Iora
- Common Jery
- Common Kingfisher
- Common Linnet
- Common Moorhen
- Common Myna
- Common Newtonia
- Common Nightingale
- Common Ostrich
- Common Pheasant
- Common Potoo
- Common Redshank
- Common Redstart
- Common Reed Bunting
- Common Reed Warbler
- Common Rosefinch
- Common Sandpiper
- Common Snipe
- Common Tailorbird
- Common Tern
- Common Tody-Flycatcher
- Common Whitethroat
- Common Woodshrike
- Coppersmith Barbet
- Coqui Francolin
- Corn Bunting
- Crane Hawk
- Crescent-faced Antpitta
- Crested Barbet
- Crested Black Tyrant
- Crested Caracara
- Crested Caracara (cheriway)
- Crested Coua
- Crested Drongo
- Crested Oropendola
- Crested Owl
- Crested Serpent Eagle
- Crested Tit
- Crested Treeswift
- Crimson-backed Tanager
- Crimson-crested Woodpecker
- Crimson-rumped Toucanet
- Crimson Sunbird
- Crowned Hornbill
- Crowned Lapwing
- Crowned Slaty Flycatcher
- Crowned Woodnymph
- Cryptic Warbler
- Cuckoo-finch
- Curl-crested Jay
- Curlew Sandpiper
- Cut-throat Finch