Netta Kaup, Skizz. Entwick. Nat. Syst., p. 122 (1829).
Type by mon., Anas rufina Pallas.
In this genus the bill is long, slightly tapering and very little raised at the base, the culmen being nearly straight; the nostrils are placed rather less than one-third the length of the bill from the base; the lamellae are broad, prominent and set rather far apart; the feathering of the forehead is cut straight across, almost at right angles to the commissure; the feet are large and powerful, the hind toe broadly lobed; the wing is comparatively short and pointed; the tail of sixteen feathers is also short and cuneate; the sexes differ in colour and the male has a very full bushy crest.
In the genus Netta, as in all other genera of this subfamily, the wings appear to be set rather farther back than in the surface-feeding ducks, their position and their small size giving an action which at once distinguishes any member of the group when in flight.
There is only one species which occurs over most of temperate Europe, North Africa and Asia.