aythya vallisneria

1 definition found

aythya vallisneria - Collaborative International Dictionary of English v.0.48 :

  Canvasback \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.
     [1913 Webster]