| English | Spanish |
| blue grey fly | mosca negra de la naranja (Aleurocanthus woglumi) |
| blue grey fly | mosca prieta (Aleurocanthus woglumi) |
| dapple-grey horse | caballo tordo rodado |
| dapple-grey horse | caballo tordillo |
| grey alder | aliso gris (Alnus incana) |
| grey-cheeked thrush | zorzal carigrís (Catharus minimus) |
| grey club-rush | juncia estrecha (Schonoplectus tabernaemontani Palla, Scirpus tabernaemontani Gmel.) |
| grey club-rush | junco de laguna (Schonoplectus tabernaemontani Palla, Scirpus tabernaemontani Gmel.) |
| grey club-rush | junco (Schonoplectus tabernaemontani Palla, Scirpus tabernaemontani Gmel.) |
| grey club-rush | cirpo lacustre (Schonoplectus tabernaemontani Palla, Scirpus tabernaemontani Gmel.) |
| grey garden slug | pequena babosa gris (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| grey garden slug | limacido reticulado (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| grey garden slug | limacido gris (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| grey garden slug | babosa pequena (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| grey garden slug | babosa gris (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| grey gurnard | cuco americano (Eutrigla gurnardus, Trigla gurnardus) |
| grey gurnard | perlón (Eutrigla gurnardus, Trigla gurnardus) |
| grey gurnard | cuco de altura (Eutrigla gurnardus, Trigla gurnardus) |
| grey gurnard | crego (Eutrigla gurnardus, Trigla gurnardus) |
| grey gurnard | clérigo (Eutrigla gurnardus, Trigla gurnardus) |
| grey-headed woodpecker | pito cano (Picus canus) |
| grey horse | caballo rodado |
| grey leaf spot | manchas de las hojas del tomate (Septoria lycopersici) |
| grey leaf spot | niebla seca del tomate (Septoria lycopersici) |
| grey mullets | lisas (Mugilidae) |
| grey mullets | mugílidos (Mugilidae) |
| grey mullets | corcones (Mugilidae) |
| grey poplar | álamo gris de Picardía (Populus canescens) |
| grey poplar | álamo cano (Populus canescens) |
| grey speck disease of cats | enfermedad de manchas grises de la avena |
| grey spot disease of cats | enfermedad de manchas grises de la avena |
| neutral grey filter | filtro neutro |
