from the inside edge of the eye to the outside edge. They function as visors to protect the eyes from the dust that is prevalent in windy arid regions. Emus have a tracheal pouch, which becomes more prominent during the mating season. At more than 30 cm in length, it is quite spacious; it has a thin wall, and an opening 8 cm long.

Distribution and habitat

Once common on the east coast of Australia, emus are now uncommon there; by contrast, the development of agriculture and the provision of water

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