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A male ostrich can reach a height of 2.8 metres (9.2 feet) and weigh over 156.8 kg (346 lb), [1] A mass of 200 kg (440 lb) has been cited for the ostrich but no wild ostriches of this weight have been verified. [2] Ostrich eggs are the largest of any bird, averaging 1.4 kg (3.1 lb). [3]
The common ostrich is the largest and heaviest living bird. Males stand 2.1 to 2.75 m (6 ft 11 in to 9 ft 0 in) tall and weigh 100 to 130 kg (220 to 290 lb), whereas females are about 1.75 to 1.9 m (5 ft 9 in to 6 ft 3 in) tall and weigh 90 to 120 kg (200 to 260 lb). [20]
Ostrich leather is a lucrative commodity, and the large feathers are used as plumes for the decoration of ceremonial headgear. Ostrich eggs and meat have been used by humans for millennia. Ostrich oil is another product that is made using ostrich fat.
Some birds, like the sanderling, have only the forward-facing toes; these are called tridactyl feet while the ostrich have only two toes (didactyl feet). [2] [4] The first digit, called the hallux, is homologous to the human big toe. [7] [10] The claws are located on the extreme phalanx of each toe. [4]
The ostrich has two toes on each foot. Top right: Emu head and upper neck. Top right: Emu head and upper neck. Bottom left: Size comparison between a human, mainland emu (centre), and extinct King Island subspecies (right).
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Ostrich eggs are the largest of all eggs, [4] though they are actually the smallest eggs relative to the size of the adult bird — on average they are 15 cm (5.9 in) long, 13 cm (5.1 in) wide, and weigh 1.4 kilograms (3.1 lb), over 20 times the weight of a chicken's egg and only 1 to 4% the size of the female. [5]
The pair disappeared on June 8, 1924, 800 feet below Everest’s summit, as they set off to complete the first documented ascent of the world’s tallest mountain.