| Common Name | Scientific name |
|---|---|
| Bee Hummingbird | Mellisuga helenae |
| Belcher's Gull | Larus belcheri |
| Belding's Yellowthroat | Geothlypis beldingi |
| Bell's Sparrow | Artemisiospiza belli |
| Bell's Vireo | Vireo bellii |
| Belted Flycatcher | Xenotriccus callizonus |
| Belted Kingfisher | Megaceryle alcyon |
| Bendire's Thrasher | Toxostoma bendirei |
| Bermuda Petrel | Pterodroma cahow |
| Berylline Hummingbird | Amazilia beryllina |
| Bewick's Swan | Cygnus bewickii |
| Bewick's Wren | Thryomanes bewickii |
| Bicknell's Thrush | Catharus bicknelli |
| Bicolored Antbird | Gymnopithys bicolor |
| Bicolored Hawk | Accipiter bicolor |
| Bicolored Wren | Campylorhynchus griseus |
| Billia rosea | Billia rosea |
| Bishop's Oo | Moho bishopi |
| Black Antshrike | Thamnophilus nigriceps |
| Black Bishop | Euplectes gierowii |
| Black Brant | Branta nigricans |
| Black Catbird | Melanoptila glabrirostris |
| Black Francolin | Francolinus francolinus |
| Black Grouse | Lyrurus tetrix |
| Black Guan | Chamaepetes unicolor |
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