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| eider à duvet (Somateria mollissima); eider m (Somateria mollissima) | |||
| canard eider (Somateria mollissima); eider à duvet (Somateria mollissima); eider m (Somateria) | |||
| eider à duvet (Somateria mollissima, Somateria mollissima mollissima) | |||
| eider: 20 phrases in 6 subjects |
| General | 1 |
| Ichthyology | 3 |
| Natural resourses and wildlife conservation | 4 |
| Natural sciences | 2 |
| Ornithology | 8 |
| Zoology | 2 |