A Species of duck (Aythya vallisneria), esteemed for the delicacy of its flesh. It visits the United States in autumn; particularly Chesapeake Bay and adjoining waters; -- so named from the markings of the plumage on its back.

North American wild duck valued for sport and food

The Canvasback (Aythya valisineria) is a large diving duck, 48-60 cm long and weighing 1270 g.