The Collaborative International Dictionary of English v.0.48:
Widgeon \Widg"eon\, n. [Probably from an old French form of F.
vigeon, vingeon, gingeon; of uncertain origin; cf. L. vipio,
-onis, a kind of small crane.] (Zool.)
Any one of several species of fresh-water ducks, especially
those belonging to the subgenus Mareca, of the genus
Anas. The common European widgeon (Anas penelope) and the
American widgeon (Anas Americana) are the most important
species. The latter is called also baldhead, baldpate,
baldface, baldcrown, smoking duck, wheat, duck, and
Bald-faced widgeon, or Green-headed widgeon, the American
Black widgeon, the European tufted duck.
(a) The gadwall.
(b) The pintail duck.
Great headed widgeon, the poachard.
(a) The poachard.
(b) The goosander.
Saw-billed widgeon, the merganser.
Sea widgeon. See in the Vocabulary.
Spear widgeon, the goosander. [Prov. Eng.]
Spoonbilled widgeon, the shoveler.
White widgeon, the smew.
Wood widgeon, the wood duck.