O. leucoryx feed on diverse types of grasses and shrubs found in their arid habitat. They go to streams and water holes to drink. When free water is not available, they can obtain moisture from sources such as melons and succulent bulbs which is sufficient for lengthy periods of time.
An introduced herd of O. leucoryx in Jordan was observed to have become active just after dawn, they grazed until about 1000hrs, rested from 1400hrs to 1500hrs, grazed again, then began to move toward a sleeping area around sunset (Nowak, 1999).
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