- Cactus Wren
- Canyon Wren
- Cape Bulbul
- Cape Cormorant
- Cape Robin-Chat
- Cape Rock Thrush
- Cape Starling
- Cape Sugarbird
- Cape Wagtail
- Cape Weaver
- Cape White-eye
- Capped Heron
- Capped Wheatear
- Cardinal Woodpecker
- Cattle Tyrant
- Chaco Chachalaca
- Changeable Hawk-Eagle
- Chestnut-backed Antbird
- Chestnut-breasted Coronet
- Chestnut-eared Aracari
- Chestnut-headed Oropendola
- Chestnut-sided Warbler
- Chestnut-winged Cinclodes
- Chinese Blue Flycatcher
- Chinspot Batis
- Chipping Sparrow
- Choco Brushfinch
- Choco Toucan
- Cinnamon Becard
- Cinnamon Flycatcher
- Citrine Wagtail
- Clamorous Reed Warbler
- Clay-colored Thrush
- Cliff Flycatcher
- Cocoa Woodcreeper
- Cocoi Heron
- Coconut Lorikeet
- Collared Aracari
- Collared Inca
- Collared Scops Owl
- Collared Sunbird
- Colombian Chachalaca
- Comb-crested Jacana
- Common Black Hawk
- Common Bronzewing
- Common Bulbul
- Common Cactus Finch
- Common Chiffchaff
- Common Chlorospingus
- Common Greenshank
- Common Hawk-Cuckoo
- Common Moorhen
- Common Murre
- Common Myna
- Common Ostrich
- Common Sandpiper
- Common Scimitarbill
- Common Smoky Honeyeater
- Common Starling
- Common Tody-Flycatcher
- Coppersmith Barbet
- Costa's Hummingbird
- Crested Barbet
- Crested Black Tyrant
- Crested Caracara
- Crested Francolin
- Crested Honey Buzzard
- Crested Oropendola
- Crimson-backed Tanager
- Crimson-breasted Shrike
- Crimson-collared Tanager
- Crimson-crested Woodpecker
- Crimson Rosella
- Crowned Hornbill
- Crowned Lapwing
- Crowned Woodnymph
- Curve-billed Thrasher