Duck

Any of several genera of relatively small, short-necked, large-billed waterfowl that belong to the subfamily Anatinae, family Anatidae (q.v.), order Anseriformes. In true ducks, i.e., those classified in Anatinae, the legs are placed rearward, as in swans, resulting in a waddling gait. Most true ducks, including a few inaccurately called geese by reason of size and build, differ