- Baillon's Crake
- Baird's Sandpiper
- Bald Eagle
- Bar-breasted Honeyeater
- Bar-headed Goose
- Bar-shouldered Dove
- Bar-tailed Godwit
- Barking Owl
- Barn Swallow
- Barnacle Goose
- Barred Antshrike
- Barred Warbler
- Barrow's Goldeneye
- Beach Stone-curlew
- Bearded Vulture
- Bimaculated Lark
- Black-bellied Sandgrouse
- Black-bellied Whistling Duck
- Black-cheeked Woodpecker
- Black-crowned Night Heron
- Black-crowned Sparrow-Lark
- Black-crowned Tityra
- Black-faced Bunting
- Black-faced Woodswallow
- Black-fronted Dotterel
- Black-headed Bunting
- Black-headed Gull
- Black-legged Kittiwake
- Black-naped Tern
- Black-necked Grebe
- Black-necked Stilt
- Black-tailed Godwit
- Black-tailed Gull
- Black-throated Accentor
- Black-throated Loon
- Black-winged Pratincole
- Black-winged Stilt
- Black Butcherbird
- Black Grouse
- Black Kite
- Black Kite (lineatus)
- Black Noddy
- Black Redstart
- Black Scoter
- Black Skimmer
- Black Swan
- Black Tern
- Black Turnstone
- Black Woodpecker
- Blackpoll Warbler
- Blackstart
- Blakiston's Fish Owl
- Blue-and-white Flycatcher
- Blue-cheeked Bee-eater
- Blue-faced Honeyeater
- Blue-grey Gnatcatcher
- Blue-vented Hummingbird
- Blue-winged Kookaburra
- Blue-winged Teal
- Blue Jay
- Blue Rock Thrush
- Bluethroat
- Bluethroat (cyanecula)
- Blyth's Pipit
- Bohemian Waxwing
- Bonaparte's Gull
- Booted Eagle
- Booted Warbler
- Brambling
- Brandt's Cormorant
- Brant Goose
- Bridled Tern
- Bristle-thighed Curlew
- Broad-billed Sandpiper
- Brolga
- Brown-backed Honeyeater
- Brown-eared Bulbul
- Brown-headed Cowbird
- Brown-headed Nuthatch
- Brown-headed Thrush
- Brown-hooded Parrot
- Brown Accentor
- Brown Booby
- Brown Dipper
- Brown Noddy
- Brown Pelican
- Brown Shrike
- Bruce's Green Pigeon
- Buff-banded Rail
- Buff-bellied Hummingbird
- Buff-breasted Sandpiper
- Bufflehead
- Bull-headed Shrike
- Burrowing Owl
- Bush Stone-curlew