- Campo Flicker
- Canada Goose
- Capped Heron
- Cardinal Woodpecker
- Cetti's Warbler
- Chaco Chachalaca
- Chalk-browed Mockingbird
- Changeable Hawk-Eagle
- Chestnut-backed Antbird
- Chestnut-backed Chickadee
- Chestnut-backed Owlet
- Chestnut-bellied Nuthatch
- Chestnut-bellied Rock Thrush
- Chestnut-bellied Seed Finch
- Chestnut-eared Aracari
- Chestnut-headed Bee-eater
- Chestnut-headed Oropendola
- Chestnut-tailed Starling
- Cinereous Tit
- Cinereous Vulture
- Cinnamon Becard
- Cinnamon Woodpecker
- Cirl Bunting
- Citrine Wagtail
- Clark's Nutcracker
- Clay-colored Thrush
- Coal Tit
- Cocoa Woodcreeper
- Cocoi Heron
- Collared Aracari
- Collared Pratincole
- Collared Trogon
- Common Black Hawk
- Common Blackbird
- Common Chaffinch
- Common Chiffchaff
- Common Crane
- Common Eider
- Common Emerald Dove
- Common Gallinule
- Common Goldeneye
- Common Greenshank
- Common Hill Myna
- Common Iora
- Common Kingfisher
- Common Linnet
- Common Moorhen
- Common Myna
- Common Nightingale
- Common Pheasant
- Common Redpoll
- Common Redshank
- Common Reed Bunting
- Common Rosefinch
- Common Sandpiper
- Common Snipe
- Common Tailorbird
- Common Tern
- Common Tody-Flycatcher
- Common Whitethroat
- Common Woodshrike
- Coppersmith Barbet
- Corn Bunting
- Crane Hawk
- Crested Barbet
- Crested Black Tyrant
- Crested Oropendola
- Crested Owl
- Crested Serpent Eagle
- Crested Treeswift
- Crimson-backed Tanager
- Crimson-crested Woodpecker
- Crimson Sunbird
- Crowned Hornbill
- Crowned Lapwing
- Crowned Slaty Flycatcher
- Crowned Woodnymph
- Curl-crested Jay
- Curlew Sandpiper
- Cut-throat Finch