| English | Spanish |
| Association for the Protection of the Environment of Western Attica | Asociación para la protección del medio ambiente en la zona oeste del Ática |
| short-necked swamp turtle, western swamp turtle | tortuga occidental de cuello de serpiente |
| Western Asia | Asia occidental |
| Western Asia A geographic region of Asia that includes Turkey, Iran and other countries of the Middle East and the Arabian peninsula | Asia occidental |
| Western barred bandicoot | bandicot de Bouganville (Perameles bougainville) |
| Western bristlebird | papamoscas piquilargo (Dasyornis longirostris) |
| Western Europe | Europa occidental |
| Western Europe A geographic region of the European continent surrounded by the North Sea, Atlantic Ocean and the Mediterranean Sea, including Belgium, France, Germany, Great Britain, Greece, Italy, Luxembourg, Netherlands, Portugal, Spain and other member countries of the Western European Union | Europa occidental |
| Western hare-wallaby | wallabi rojo (Lagorchestes hirsutus) |
| Western horned tragopan | tragopan occidental (Tragopan melanocephalus) |
| Western Pontic beech forests | hayedo póntico occidental |
| Western Pontic Paeonian steppes | estepas pónticas occidentales |
| Western Pontic steppes | estepas pónticas occidentales |
| Western rufous bristlebird | papamoscus rosa occidental (Dasyornis broadbenti litoralis) |
| Western rufous bristlebird, lesser rufous bristlebird, rufous-headed bristlebird | papamoscas rosa occidental (Dayornis broadbenti litoralis p.e.) |
| Western scrub-bird | pájaro de los matorrales (Atrichornis clamosus) |
| western swamp turtle | tortuga occidental de cuello de serpiente (Pseudemydura umbrina) |
| Western taiga | taiga occidental |
| western tragopan | tragopan occidental (Tragopan melanocephalus) |
