| Common Name | Scientific name |
|---|---|
| Brown Jay | Psilorhinus morio |
| Brown Noddy | Anous stolidus |
| Brown Pelican | Pelecanus occidentalis |
| Brown Shrike | Lanius cristatus |
| Brown Thrasher | Toxostoma rufum |
| Brown Trembler | Cinclocerthia ruficauda |
| Brown Violetear | Colibri delphinae |
| Brown-backed Solitaire | Myadestes occidentalis |
| Brown-billed Scythebill | Campylorhamphus pusillus |
| Brown-capped Rosy-Finch | Leucosticte australis |
| Brown-capped Tyrannulet | Ornithion brunneicapillus |
| Brown-capped Vireo | Vireo leucophrys |
| Brown-chested Martin | Progne tapera |
| Brown-crested Flycatcher | Myiarchus tyrannulus |
| Brown-headed Cowbird | Molothrus ater |
| Brown-headed Nuthatch | Sitta pusilla |
| Brown-hooded Parrot | Pyrilia haematotis |
| Brown-throated Parakeet | Eupsittula pertinax |
| Brownish Twistwing | Cnipodectes subbrunneus |
| Bryan's Shearwater | Puffinus bryani |
| Brünnich's Murre | Uria lomvia |
| Budgerigar | Melopsittacus undulatus |
| Buff-bellied Hummingbird | Amazilia yucatanensis |
| Buff-breasted Flycatcher | Empidonax fulvifrons |
| Buff-breasted Sandpiper | Calidris subruficollis |
RingBase adheres to EURING codes.
