The kori bustard (Ardeotis kori) is the largest flying bird native to Africa. It is a member of the bustard family, which all belong to the order Gruiformes and are restricted in distribution to the Old World. It is one of the four species (ranging from Africa to India to Australia) in the large-bodied Ardeotis genus. In fact, the male kori bustard may be the heaviest living animal capable of flight. This species, like most bustards, is a ground-dwelling bird and an opportunistic omnivore. Male kori bustards, which can be more than twice as heavy than the female, attempt to breed with as many females as possible and then take no part in the raising of the young. The nest is a shallow hollow in the earth, often disguised by nearby obstructive objects such as trees. The specific epithet kori is derived from the Tswana name for this bird – Kgori.
This species occurs in open grassy areas, often characterized by sandy soil, especially Kalahari sands, and short grass usually near the cover of isolated clumps of trees or bushes. It may be found in plains, arid plateaus, highveld grassland, arid scrub, lightly wooded savanna, open dry bushveld and semi-desert. Where this species occurs, annual rainfall is quite low, at between 100 and 600 mm (3.9 and 23.6 in). Breeding habitat is savanna in areas with sparse grass cover and scattered trees and shrubs. When nesting they sometimes use hilly areas. They follow fires or herds of foraging ungulates, in order to pick their various foods out of the short grasses. They may also be found in cultivated areas, especially wheat fields with a few scattered trees. This bustard is not found in well-wooded and forested areas due to the fact that it needs a lot of open space in which to take off. In arid grassland areas it is found along dry watercourses where patches of trees offer shade during the heat of the day. source