The Canvasback (Aythya valisineria) is a wild duck that is found only in North America. The adult male, or drake, is a large white-bellied, grey-backed duck with a black chest, sloping forehead, and ruddy chestnut head and neck. The adult female is about the same size and has the same sloping forehead and long bill. Less colourful, she is more able to blend into her surroundings when on the nest or rearing her young. She is white-bellied with a pale brown back and reddish brown head, neck, and chest. Male and female Canvasbacks resemble Redheads and Ring-necked Ducks of the corresponding sex, but can be distinguished from them by their longer black bills and less abrupt foreheads.
