- Baird's Sandpiper
- Bald Eagle
- Baltimore Oriole
- Barn Swallow
- Barred Owl
- Bay-breasted Warbler
- Belted Kingfisher
- Black-and-white Warbler
- Black-bellied Whistling Duck
- Black-capped Chickadee
- Black-crowned Night Heron
- Black-legged Kittiwake
- Black-necked Grebe
- Black-necked Stilt
- Black-throated Blue Warbler
- Black-throated Green Warbler
- Black-throated Grey Warbler
- Black Guillemot
- Black Scoter
- Black Skimmer
- Black Tern
- Black Vulture
- Blackburnian Warbler
- Blackpoll Warbler
- Blue-grey Gnatcatcher
- Blue-headed Vireo
- Blue-winged Teal
- Blue-winged Warbler
- Blue Jay
- Boat-tailed Grackle
- Bobolink
- Bohemian Waxwing
- Bonaparte's Gull
- Boreal Chickadee
- Boreal Owl
- Brant Goose
- Brazilian Tanager
- Brown-headed Cowbird
- Brown Creeper
- Brown Pelican
- Brown Thrasher
- Bufflehead
- Burrowing Owl