- Canada Goose
- Canada Jay
- Canada Warbler
- Canvasback
- Cape May Warbler
- Carolina Wren
- Caspian Tern
- Cedar Waxwing
- Cerulean Warbler
- Chestnut-sided Warbler
- Chipping Sparrow
- Clark's Nutcracker
- Clay-colored Sparrow
- Common Eider
- Common Gallinule
- Common Goldeneye
- Common Grackle
- Common Kestrel
- Common Loon
- Common Merganser
- Common Moorhen
- Common Murre
- Common Nighthawk
- Common Redpoll
- Common Scoter
- Common Starling
- Common Tern
- Common Yellowthroat
- Cooper's Hawk
- Cory's Shearwater
- Crested Caracara
- Crested Caracara (cheriway)