The emu is the largest bird in Australia and the second-largest extant bird in the world by height, after its ratite relative, the ostrich. The Emu is common over most of mainland Australia, although it avoids heavily populated areas, dense forest, and arid areas.
The largest emus can reach up to 150 to 190 cm in height, 1 to 1.3 m at the shoulder. Emus weigh between 18 and 55 kg. Females are usually larger than males by a small amount.
Emus predominately travel in pairs, and while they can form enormous flocks, this is an atypical social behavior that arises from the common need to move towards food sources. Emus have been shown to travel long distances to reach abundant feeding areas. In Western Australia, Emu movements follow a distinct seasonal pattern—north in summer and south in winter.
Emus eat vegetables like roots, grass, seeds, fruit, flowers, and feed on invertebrates.
Emus form breeding pairs during the summer months and may remain together for about five months.
During the mating season, the female lays on average 11 eggs every second or third day. The egg is very large weighing 600. Its thick and dark-green shell is around 1 mm.