| English | Spanish |
| brown-banded bamboo shark | bamboa estriada (Chiloscyllium punctatum) |
| brown-black carpenter ant | hormiga carpintera (Camponotus ligniperdus) |
| brown flycatcher | papamoscas pardo (Muscicapa latirostris) |
| brown garden snail | caracol de las viñas (Cornu aspersum, Helix aspersa) |
| brown garden snail | caracol (Cornu aspersum, Helix aspersa) |
| brown hare | liebre común (Lepus capensis, Lepus europaeus) |
| brown heart disease | mal del corazón pardo |
| Brown needle blight:pine, Needle blight:pine, Red band needle blight:pine, Blight:pine | estriado rojo de las acículas del pino (Cytosporina septospora, Dothistroma pini, Dothistroma septospora, Scirrhia pini) |
| brown noddy | charrán pardelo (Anous stolidus) |
| brown rat | rata norvega (Epimys norvegicus, Rattus norvegicus) |
| brown rat | rata comun (Epimys norvegicus, Rattus norvegicus) |
| brown rat | rata (Rattus norvegicus) |
| brown rayed knapweed | cártamo silvestre (Centaurea jacea) |
| brown rayed knapweed | jacea (Centaurea jacea) |
| brown rayed knapweed | alazor silvestre (Centaurea jacea) |
| brown sarsaparilla | zarzaparrilla de Honduras (Smilax regelii) |
| brown seaweed | alga parda |
| brown seaweeds | algas pardas (Phaeophyceae) |
| brown vole | ratilla campestre (Microtus agrestis) |
| northern brown shrimp | langostino mejicano (Penaeus aztecus) |
| northern brown shrimp | camarón café norteño (Penaeus aztecus) |
