The Common Eider (Somateria mollissima) is a sea-duck found on the seas around northern Europe, America and Siberia. It breeds in the Arctic, but comes south in the winter. When I lived in the North of England, the arrival of this duck was a sure sign that winter was coming.
The bird has a couple of other common names, including St. Cuthbert's Duck and Cuddy's Duck. The famous Eider down is (or at least was) harvested from the nests of these birds. The scientific name of this bird refers to the warmth and softness of its feathers.
These pictures may not be the best I have ever taken, but they were taken in very gloomy conditions in Bergen in Norway in the winter. While not being north of the Arctic Circle it was close! I have used some new software to reduce the noise in the pictures caused by the need to use a high ISO rating - the result seem pretty good.