Range / Habitat: Breeds in ponds, streams, and other wetlands in the circumpolar Arctic. Winters on open ocean or on large freshwater lakes in northern latitudes.
Field Notes: Medium-sized diving duck. Mostly black-and-white plumage, varying throughout year in a series of complicated moults. Black wings in all plumages. Male has long central tail feathers and often a pink band near tip of black bill.
Personal Notes: Seen on Lake Myvatn in Iceland. Colloquially known as Oldsquaw.