The Syrian wild ass (Equus hemionus hemippus), less commonly known as a hemippe, is an extinct subspecies of onager native to the Arabian peninsula. It ranged across present-day Syria, Israel, Jordan, Saudi Arabia and Iraq.
The Syrian wild ass, only one metre high at its shoulder, was the smallest form of Equidae and could not be domesticated. Its coloring changed with the seasons—a tawny olive coat for the summer months and pale sandy yellow for the winter. It was known, like other onagers, to be untameable, and was compared to a thoroughbred horse for its beauty and strength.
The Syrian wild ass lived in deserts, semideserts, arid grasslands and mountain steppes. Native to West Asia, they were found in Israel, Jordan, Syria, Saudi Arabia and Iraq.
After the extinction of the Syrian wild ass, the Persian onager from Iran was chosen as the appropriate subspecies to replace the extinct onagers in the Middle East. The Persian onager was then introduced to the protected areas of Saudi Arabia and Jordan. It was also reintroduced, along with the Turkmenian kulan, to Israel, where they both reproduce wild ass hybrids in the Negev Mountains and the Yotvata Hai-Bar Nature Reserve.