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The Emu or Dromaius novaehollandiae is the second-tallest living bird after the ostrich, its ratite relative. It is endemic to Australia, where it is the largest native bird and the only extant member of the genus Dromaius.
Dromaius novaehollandiae or Emus are soft-feathered, brown, flightless birds with long necks and legs, and can reach up to 6 ft 3 in. in height.
Emus can travel great distances, and when necessary can sprint at 30 mph.
They forage for a variety of plants and insects, but have been known to go for weeks without eating. They drink infrequently, but take in copious amounts of water when the opportunity arises.
Breeding takes place in May and June, and fighting among females for a mate is common. Females can mate several times and lay several clutches of eggs in one season.
The male Dromaius novaehollandiae or Emu does the incubation. During this process he hardly eats or drinks and loses a significant amount of weight. The eggs hatch after around eight weeks, and the young are nurtured by their fathers.
They reach full size after around six months, but can remain as a family unit until the next breeding season.
The bird is sufficiently common for it to be rated as a least-concern species by the International Union for Conservation of Nature. Threats to their survival include predation of their eggs, roadkills, and fragmentation of their habitats.
Although flightless, emus have vestigial wings, the wing chord measures around 8 in. and each wing having a small claw at the tip. Emus flap their wings when running, perhaps as a means of stabilising themselves when moving fast.
Dromaius novaehollandiae or Emus have long necks and legs, and can run at speeds of 30 mph. Due to their highly specialised pelvic limb musculature. Their feet have only three toes and a similarly reduced number of bones and associated foot muscles.
Emus are unique among birds in that their gastrocnemius muscles in the back of the lower legs have four bellies instead of the usual three.
