Nettapus Brandt, Descr. Icon. Anim. Boss., p. 5 (1836).
Type by mon., Anas aurita Bodd.
This genus is distinguished by its short goose-like beak and small size. The bill is high at the base and narrows gradually in front; the small, oval nostrils are situated near the base; the legs are placed far back ; there is a hind toe with a narrow but distinct lobe; the wings are pointed; the tail of twelve feathers is rounded. Sexes different.