| Subject | English | Portuguese |
| nat.res. | common eider | êider-edredão (Somateria mollissima) |
| gen. | eider down | edredão plumas |
| nat.res. | eider duck | êider (Somateria mollissima) |
| nat.res. | king eider | êider-real (Somateria spectabilis) |
| nat.sc. | spectacled eider | êider-de-lunetas (Somateria fischeri) |
| nat.res. | Steller's eider | êider-de-steller (Polysticta stelleri) |