- Caatinga Puffbird
- Campo Flicker
- Canada Goose
- Canada Warbler
- Cape Wagtail
- Capped Conebill
- Capped Heron
- Cardinal Quelea
- Cardinal Woodpecker
- Carrion Crow
- Carruthers's Cisticola
- Caspian Tern
- Cassin's Flycatcher
- Cattle Tyrant
- Cetti's Warbler
- Chaco Chachalaca
- Chalk-browed Mockingbird
- Chestnut-bellied Guan
- Chestnut-bellied Sandgrouse
- Chestnut-bellied Seed Finch
- Chestnut-bellied Starling
- Chestnut-breasted Coronet
- Chestnut-capped Brushfinch
- Chestnut-colored Woodpecker
- Chestnut-eared Aracari
- Chestnut-throated Apalis
- Chestnut-vented Conebill
- Chestnut Wattle-eye
- Chestnut Weaver
- Chiguanco Thrush
- Chinspot Batis
- Choco Brushfinch
- Choco Toucan
- Choco Warbler
- Chotoy Spinetail
- Chubb's Cisticola
- Cinereous-breasted Spinetail
- Cinnamon-chested Bee-eater
- Cinnamon Flycatcher
- Cirl Bunting
- Clay-colored Thrush
- Cliff Flycatcher
- Coal Tit
- Cocoi Heron
- Collared Forest Falcon
- Collared Inca
- Collared Plover
- Collared Pratincole
- Collared Whitestart
- Common Blackbird
- Common Bulbul
- Common Buttonquail
- Common Buzzard
- Common Chiffchaff
- Common Crane
- Common Cuckoo
- Common Firecrest
- Common Grasshopper Warbler
- Common Greenshank
- Common Kestrel
- Common Kingfisher
- Common Linnet
- Common Moorhen
- 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 Whitethroat
- Compact Weaver
- Corn Bunting
- Crane Hawk
- Cream-colored Woodpecker
- Creamy-bellied Thrush
- Crested Caracara
- Crested Francolin
- Crested Guan
- Crested Lark
- Crested Oropendola
- Crested Tit
- Crimson-crested Woodpecker
- Crimson-mantled Woodpecker
- Crimson-rumped Toucanet
- Crimson-rumped Waxbill
- Croaking Cisticola
- Crowned Lapwing
- Crowned Slaty Flycatcher
- Crowned Woodnymph
- Curlew Sandpiper
- Cut-throat Finch