| Common Name | Scientific name |
|---|---|
| Warbling Vireo | Vireo gilvus |
| Water Pipit | Anthus spinoletta |
| Water Rail | Rallus aquaticus |
| Wattled Jacana | Jacana jacana |
| Waved Albatross | Phoebastria irrorata |
| Wedge-billed Woodcreeper | Glyphorynchus spirurus |
| Wedge-rumped Storm-Petrel | Oceanodroma tethys |
| Wedge-tailed Grass-Finch | Emberizoides herbicola |
| Wedge-tailed Sabrewing | Campylopterus curvipennis |
| Wedge-tailed Shearwater | Ardenna pacifica |
| West Indian Whistling Duck | Dendrocygna arborea |
| West Indian Woodpecker | Melanerpes superciliaris |
| West Mexican Chachalaca | Ortalis poliocephala |
| Western Barn Owl | Tyto alba |
| Western Bluebird | Sialia mexicana |
| Western Cattle Egret | Bubulcus ibis |
| Western Chat-Tanager | Calyptophilus tertius |
| Western Grebe | Aechmophorus occidentalis |
| Western Gull | Larus occidentalis |
| Western Jackdaw | Coloeus monedula |
| Western Kingbird | Tyrannus verticalis |
| Western Marsh Harrier | Circus aeruginosus |
| Western Meadowlark | Sturnella neglecta |
| Western Orphean Warbler | Sylvia hortensis |
| Western Reef Heron | Egretta gularis |
RingBase adheres to EURING codes.
