Wild Ass in Wikipedia

Corresponds in the Old Testament to two words, péré' and 'arôdh. Whether these two names refer to different species, or are, the one, the genuine Hebrew name, the other, the Aramaic equivalent for the same animal, is uncertain. Both signify one of the wildest and most untamable animals. The wild ass is larger and more shapely than the domestic one, and outruns the fleetest horse. Its untamableness joined to its nimbleness made it a fit symbol for the wild and plunder-loving Ismael (Genesis 16:12). The wild ass, extinct in western Asia, still exists in central Asia and the deserts of Africa.