Cactus Wren
California Condor
California Gnatcatcher
California Gull
California Quail
California Thrasher
California Towhee
Calliope Hummingbird
Canada Goose
Canada Warbler
Canvasback
Canyon Towhee
Canyon Wren
Cape May Warbler
Carolina Chickadee
Carolina Parakeet
Carolina Wren
Caspian Tern
Cassin's Auklet
Cassin's Finch
Cassin's Kingbird
Cassin's Sparrow
Cassin's Vireo
Cattle Egret
Cave Swallow
Cedar Waxwing
Cerulean Warbler
Chestnut-Backed Chickadee
Chestnut-Collared Longspur
Chestnut-Sided Warbler
Chihuahuan Raven
Chimney Swift
Chipping Sparrow
Christmas Shearwater
Chuck-Will's-Widow
Chukar
Cinnamon Teal
Clapper Rail
Clark's Grebe
Clark's Nutcracker
Clay-Colored Sparrow
Cliff Swallow
Colima Warbler
Common Black-Hawk
Common Eider
Common Gallinule
Common Goldeneye
Common Grackle
Common Ground Dove
Common Loon
Common Merganser
Common Murre
Common Myna
Common Nighthawk
Common Pauraque
Common Poorwill
Common Raven
Common Redpolls
Common Tern
Common Yellowthroat
Connecticut Warbler
Cooper's Hawk
Cordilleran Flycatcher
Costa's Hummingbird
Couch's Kingbird
Crested Auklet
Crested Caracara
Crested Myna
Crissal Thrasher
Curve-Billed Thrasher