noun, plural widgeons (especially collectively) widgeon for 1.
any of several common freshwater ducks related to the mallards and teals in the genus Anas, having metallic green flight feathers, a white wing patch, and a buff or white forehead, including A. penelope of Eurasia and North Africa, A. sibilatrix of South America, and the baldpate, A. americana, of North America.
migratory wild duck, 1513, perhaps from some variant of Fr. vigeon, which some trace to L. vipionem (nom. vipio), "a kind of small crane," a Balearic word, perhaps imitative. OED, however, finds this all "very dubious."