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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]
Two living species are recognised, the common ostrich, native to large areas of sub-Saharan Africa, and the Somali ostrich, native to the Horn of Africa. They are the heaviest and largest living birds, with adult common ostriches weighing anywhere between 63.5 and 145 kilograms and laying the largest eggs of any living land animal. [ 3 ]
The largest extant species of bird measured by mass is the common ostrich (Struthio camelus), closely followed by the Somali ostrich (Struthio molybdophanes). 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 ...
The African bush elephant (foreground), Earth's largest extant land animal, and the Masai ostrich ... A size comparison between a human and 4 moa species: 1.
A comparison of a kiwi (l), ostrich (c), and Dinornis (r), each with its egg The moa's closest relatives are small terrestrial South American birds called the tinamous , which can fly. [ 9 ] [ 14 ] [ 15 ] [ 16 ] Previously, the kiwi , the Australian emu , and cassowary [ 17 ] were thought to be most closely related to moa.
The ostrich has two toes on each foot. Top right: Emu head and upper neck. Bottom left: Size comparison between a human, mainland emu (centre), and extinct King Island subspecies (right). Bottom right: Adult in South Eastern Australia.
A millimeter-sized sea animal could hold clues to the evolution of the human nervous system. While placozoans are simple animals only as big as a grain of sand, the blobs have unique cells that ...
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]