Their range is two protected areas of Iran.
They inhabit harsh semi-arid desert with hot days and cool nights.
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.
They eat mainly grasses. In the dry season, they break woody plants with their hooves for succulent portions and seed pods. They also may dig up to 2 feet deep for water
Herbivore pellet and hay