| English | Spanish |
| blue-gray carpet shark | tiburón ciego gris (Heteroscyllium colcloughi) |
| dapple-gray horse | caballo tordo rodado |
| dapple-gray horse | caballo tordillo |
| gray alder | aliso cano (Alnus incana) |
| gray alder | aliso gris (Alnus incana) |
| gray alder | aliso blanco (Alnus incana) |
| gray garden slug | limacido reticulado (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| gray garden slug | babosa pequena (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| gray garden slug | babosa gris (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| gray garden slug | pequena babosa gris (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| gray garden slug | limacido gris (Agriolimax agrestis reticulatus, Agriolimax reticulatus, Deroceras reticulatum) |
| gray horse | caballo rodado |
| gray poplar | álamo gris de Picardía (Populus canescens) |
| gray poplar | álamo cano (Populus canescens) |
| Gray's grasshopper warbler | buscarla de Gray (Locustella fasciolata) |
| gray spot | manchas grisáceas (Mycogone perniciosa Magn.s.i.) |
