COMMON EIDER

Couple of common eider (Somateria mollissima), Shetland Islands, Scotland.
On this image, we can see a female betwen two males.

Among common eiders, there is an important sexual dimorphism between male and female. In fact, the female has a dull plumage, in the brown tones, whereas the male is usually white and black.

Somateria mollissima > Common eider > Eider > Duck > Anatid > Palmiped > Bird