The king eider (Somateria spectabilis) is a large sea duck that breeds along Northern Hemisphere Arctic coasts of northeast Europe, North America and Asia.

Diet: Feeds mostly on mollusks, but depending on season and location, they will also feed on crustaceans, aquatic insects and larvae, and occasionally plant material.
Behavior: King Eiders are excellent divers, and obtain most of their food by diving underwater, sometimes to depths of up to 100 feet or more.