King eider

The king eider (pronounced /ˈaɪ.dər/) (Somateria spectabilis) is a large sea duck that breeds along Northern Hemisphere Arctic coasts of northeast Europe, North America and Asia. The birds spend most of the year in coastal marine ecosystems at high latitudes, and migrate to Arctic tundra to breed in June and July. They lay four to seven eggs in a scrape on the ground lined with grass and down.

Taxonomy and etymology

When he first described the king eider in 1758, in the 10th edition of his opus Systema Naturae, Carl Linnaeus assigned it to the genus Anas, along with the rest of the ducks. In 1819, William Elford Leach moved it and the other large eiders to the genus Somateria, where it has remained since. It is very closely related to the other members of its genus, and is known to hybridise with the common eider. Despite its very large range, it is monotypic.

The genus name Somateria is a combination of the Greek words sōma or sōmatos, meaning "body", and erion, meaning "wool"; the combination (i.e. "wooly body") is a reference to the eider's famously thick, soft down. The specific name spectabilis is Latin for "showy", "remarkable" or "worth seeing", a reference to the handsomeness of the adult male's plumage. The bird's common name, king eider, is a direct translation of its Icelandic name. It is called "king" because of the orange, crown-like knob above the male's bill; the male's multicoloured plumage also suggests royal robes. "Eider" is a Dutch, German or Swedish word derived from the Icelandic word æður (meaning eider), itself derived from the Old Norse æthr.