2. Aerospace. See extravehicular mobility unit.
* * *Ratite of Australia.After the ostrich, the emu is the second-largest living bird. They stand more than 5 ft (1.5 m) tall and often weigh more than 100 lbs (45 kg). The common emu (Dromaius novaehollandiae, family Dromaiidae), the only survivor of several forms exterminated by settlers, has a stout body and long legs. Both sexes are brownish, with a dark-gray head and neck. Emus can run up to 30 mph (50 kph); if cornered, they kick with their large feet. They mate for life and forage in small flocks for fruits and insects but sometimes damage crops. See also cassowary.Emu (Dromaius novaehollandiae)V. ServentyBruce Coleman Inc./EB Inc.
* * *▪ birdflightless bird of Australia and second largest living bird: the emu is more than 1.5 m (5 feet) tall and may weigh more than 45 kilograms (100 pounds). The emu is the sole living member of the family Dromaiidae (or Dromiceiidae) of the order Casuariiformes, which also includes the cassowaries.The common emu, Dromaius (or Dromiceius) novaehollandiae (see photograph—>), the only survivor of several forms exterminated by settlers, is stout bodied and long legged, like its relative the cassowary. Both sexes are brownish, with dark-gray head and neck. Emus can dash away at nearly 50 kilometres per hour (30 mph); if cornered they kick with their big, three-toed feet. Emus mate for life; the male incubates from 7 to 10 dark-green eggs, 13 centimetres (5 inches) long, in a ground nest for about 60 days. The striped young soon run with the adults. In small flocks emus forage for fruits and insects but may also damage crops. The peculiar structure of the trachea of the emu is correlated with the loud booming note of the bird during the breeding season. Three subspecies are recognized, inhabiting northern, southeastern, and southwestern Australia; a fourth, now extinct, lived on Tasmania.
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