The canvasback is a species of diving duck, the largest found in North America.
Image: Aythya valisineria at Las Gallinas Wildlife Ponds
Image: Aythya valisineria 2
Drake canvasback stretching wings
Tubers of Sago Pondweed (Stuckenia pectinata), a favorite food of the canvasback
The diving ducks, commonly called pochards or scaups, are a category of duck which feed by diving beneath the surface of the water. They are part of Anatidae, the diverse and very large family that includes ducks, geese, and swans.
Diving duck
Female A. australis, the only Australian representative of Aythyinae