Barrow`s goldeneye (Bucephala islandica) is a medium-sized sea duck of the genus Bucephala, the goldeneyes. This bird was named after Sir John Barrow. Adults are similar in appearance to the common goldeneye. Adult males have a dark head with a purplish gloss and a white crescent at the front of the face. Adult females have a mostly yellow bill. .... Found on http://en.wikipedia.org/wiki/Barrow`s_goldeneye
(from the article `goldeneye`) ...a characteristic whistling sound with their rapidly beating wings. The common goldeneye (Bucephala clangula) breeds throughout the Northern ... Found on http://www.britannica.com/eb/a-z/b/25