| Common Name | Scientific name |
|---|---|
| Blue-winged Teal | Spatula discors |
| Blue-winged Warbler | Vermivora cyanoptera |
| Bluethroat | Luscinia svecica |
| Blyth's Pipit | Anthus godlewskii |
| Blyth's Reed Warbler | Acrocephalus dumetorum |
| Boat-billed Flycatcher | Megarynchus pitangua |
| Boat-billed Heron | Cochlearius cochlearius |
| Boat-tailed Grackle | Quiscalus major |
| Bobolink | Dolichonyx oryzivorus |
| Bohemian Waxwing | Bombycilla garrulus |
| Bonaparte's Gull | Chroicocephalus philadelphia |
| Bonelli's Eagle | Aquila fasciata |
| Bonelli's Warbler | Phylloscopus bonelli |
| Bonin Petrel | Pterodroma hypoleuca |
| Booted Eagle | Hieraaetus pennatus |
| Booted Warbler | Iduna caligata |
| Boreal Chickadee | Poecile hudsonicus |
| Boreal Owl | Aegolius funereus |
| Botteri's Sparrow | Peucaea botterii |
| Boucard's Wren | Campylorhynchus jocosus |
| Brace's Emerald | Chlorostilbon bracei |
| Brahminy Starling | Sturnia pagodarum |
| Brambling | Fringilla montifringilla |
| Bran-colored Flycatcher | Myiophobus fasciatus |
| Brandt's Cormorant | Phalacrocorax penicillatus |
RingBase adheres to EURING codes.
