<skos:note xml:lang="en">General term for members of various species of relatively small, short-necked, large-billed waterfowl. They differ from geese in being smaller in size and having legs that are placed rearward, and the result is a distinctive waddling gait. Males, known as drakes, and females, known as hens, exhibit some degree of differentiation in plumage and in call.</skos:note>