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
Red-crested Korhaan
Lophotis ruficrista
The red-crested korhaan grows up to 50 cm (1.6 ft) in length with a maximal weight of 680 g (1.5 lb). The feathering of the wings folded on the back is marked by V-formed patterns of a light cream color with some white at the sides. Breast feathers are black. Legs are pale yellow and feet gray. Voice: The red-crested korhaan has a very distinct call. See The call of the red-crested korhaan.
ID text from Wikipedia, CC BY-SA 4.0
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