Tadorna Fleming, Philos. Zool., ii, p. 260 (1822).
Type by taut., Anas tadorna Linn.
In the genus Tadorna the bill is short, high at the base, concave above, the tip flattened and turned up, the nail small and abruptly turned downwards and inwards; the males have a fleshy knob at the base of the bill which is larger in the breeding-season; the nostrils are less than one-third the length of the bill from the base; the tarsus is scutellated in front near the foot; the wings are long and pointed ; the tail of fourteen feathers is rounded.
Sexes alike, the female slightly duller only.