Histrionicus histrionicus
The Harlequin Duck drake is blue-gray with white streaks and patches rimmed with black. It has a white crescent on its face, a white spot behind the eyes and a white oval behind that. It has a reddish stripe on the crown and the same color on its flanks. The hen has a brown head and body, a white spot behind the eye and a whitish patch at the base of the bill. (source: Flyways.us)