can·vas·back /ˈkænvəsˌbæk/
野鴨的一種[北美產]
Can·vas·back n. Zool. 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.
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canvasback
n : North American wild duck valued for sport and food [syn: canvasback
duck, Aythya valisineria]