The only Australian species of
Ardeotis, a genus occurring in the African, Indian and Australasian regions, this bustard is a large terrestrial bird that resembles an American
turkey in its form and behaviour. It is readily distinguished by its large size, long legs and habits while slowly striding across open plains. The general coloration of
A. australis is black at the crown and nape, the long neck is pale grey at the front, and brown plumage cover the wings and upper body. The sexes are similar in appearance, females are smaller in stature, wingspan and weight than the males. The abdomen is white and separated from the light grey of the neck by a black band of feathers. The
wing coverts are patchily coloured with black and white patterning, which is visible while at rest or especially in flight. The iris is white, and their beak is variously whitish to brown in colour. The legs are long and yellow to cream coloured. Males are up to tall with a wingspan. The average weight for males is , with a range of . The female is quite a bit smaller at tall, with a wingspan and an average body mass of in a range of but is similarly coloured. The largest male recorded was 14.5 kg (32 lb), a specimen obtained in Victoria. Reports of large birds, presumably males, were given by
Tom Carter in the west (16 lb), a recorded range of 16–18 lb by
E. F. Boehm in South Australia was exceeded in some specimens (28 lb). The smaller specimens in records are of an unwell adult weighing 9 lb, shot by Carter at
Broomehill, and a healthy but small specimen of 7½ lb captured and weighed by
Dominic Serventy and
Hubert Whittell at
Bridgetown in 1949. Although it is the largest extant flying land bird in Australia, this long-legged bird is the smallest species in the genus
Ardeotis. ==Behaviour==