National Geographic : 1950 Mar
'415 Canvasbacks and Lesser Seaups Swarm over San Francisco Bay on a Crisp Winter Day Distinctly an American bird, the colorful canvasback is one of the most familiar of North American ducks. The drake is a regal creature with its big white body, slender-shaped head, and long, thick neck. Both the canvasback and scaup are diving ducks, characterized by their huge paddles of feet, heavy bodies, and rather small wings. In the western United States the lesser scaup is called "bluebill," but in the East it is commonly known as "blackhead."