The goldeneye is a duck that visits the United States in winter, but breeds only in Canada. In the male goldeneye,
Glaucionetta clangula americana, the head is glossy green, with a slight crest and white cheek patches; the front and sides of the body are mostly white and the back and tail black. An allied species,
G. islandica, is abundant in Iceland and North America, and is known as Barrow's goldeneye.