Great Bustard
Otis tarda
The adult male great bustard is amongst the heaviest living flying birds. A male is typically 90–105 cm (2 ft 11 in – 3 ft 5 in) tall, with a length of around 115 cm (3 ft 9 in) and has a 2.1–2.7 m (6 ft 11 in – 8 ft 10 in) wingspan. The male can range in weight from 5.8 to 18 kg (13 to 40 lb). The heaviest verified specimen, collected in Manchuria, was about 21 kg (46 lb), a world record for heaviest flying bird. In a study in Spain, one male weighed as much as 19 kg (42 lb). Larger specimens have been reported but remain unverified.
ID text from Wikipedia, CC BY-SA 4.0
Kori Bustard
Ardeotis kori
The kori bustard is cryptically coloured, being mostly grey and brown, finely patterned with black and white coloring. The upper parts and neck are a vermiculated black and greyish-buff colour. The ventral plumage is more boldly colored, with white, black and buff. The crest on its head is blackish in coloration, with less black on the female's crest. There is a white eye stripe above the eye. The chin, throat and neck are whitish with thin, fine black barring. A black collar at the base of the hind-neck extends onto the sides of the breast. Voice: Less vocal than other bustards, the kori bustard is generally silent but, when alarmed, both sexes emit a loud growling bark. This is described as a ca-caa-ca call, repeated several times for up to 10 minutes. This call carries long distances. This call is most often given by females with young and males during agonistic encounters.
ID text from Wikipedia, CC BY-SA 4.0
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