This wild cousin of a horse, is adapted for cold nights and extreme hot desert days. There are only about 600 Persian onagers left in the Iranian desert they call home.
The Persian onager has a weight of 440 to 575 pounds and a height of approximately 50 inches at the shoulder. Their legs and belly are usually light beige or tan with darker markings on the neck and sides. There is a dark brown stripe along the back. They have a short (2 to 3 inch) mane, and have tails with a small tuft of hair at the end.
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Onagers can withstand temperature extremes from 120 degrees to bitter cold.
Onagers are most active at dawn and dusk. They get most of their water from food but live near water if possible. A territorial system is common, with males guarding prime territories and females moving among guarded territories depending on habitat and male preference. Immature males sometimes form all male groups.
Reproduction is seasonal with births between April and September in North America. Males and females reach sexual maturity at about 2 years. Males do no usually breed until about 4 years of age.