Found 1 items, similar to Aythya vallisneria.
English → English (gcide) Definition: Aythya vallisneria Canvasback \Can"vas*back`\, n. (Zo["o]l.) 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. [1913 Webster]