- Caatinga Cacholote
- Caica Parrot
- Campo Flicker
- Canada Goose
- Capped Heron
- Carib Grackle
- Carmelite Sunbird
- Carrion Crow
- Chaco Chachalaca
- Chalk-browed Mockingbird
- Channel-billed Toucan (ariel)
- Chestnut-bellied Guan
- Chestnut-bellied Seedeater
- Chestnut-belted Gnateater
- Chestnut-eared Aracari
- Chestnut-rumped Woodcreeper
- Chestnut-vented Conebill
- Chestnut Woodpecker
- Chopi Blackbird
- Cinereous Antshrike
- Cinereous Becard
- Cinereous Mourner
- Cinnamon Attila
- Cocoi Heron
- Collared Gnatwren
- Collared Plover
- Collared Puffbird
- Collared Trogon
- Common Blackbird
- Common Bulbul
- Common Chaffinch
- Common Chiffchaff
- Common Goldeneye
- Common Ground Dove
- Common Kestrel
- Common Kingfisher
- Common Moorhen
- Common Myna
- Common Pochard
- Common Potoo
- Common Redshank
- Common Reed Bunting
- Common Sandpiper
- Common Scale-backed Antbird
- Common Starling
- Common Tern
- Common Tody-Flycatcher
- Common Waxbill
- Common Wood Pigeon
- Copper Sunbird
- Coraya Wren
- Crane Hawk
- Cream-colored Woodpecker
- Crested Lark
- Crested Oropendola
- Crimson-crested Woodpecker
- Crimson-hooded Manakin
- Crimson Topaz
- Curve-billed Scythebill