Cases of fertile union are recorded between the horse and the quagga, the horse and the bonte-quagga or Burchell's zebra, the horse and the onager and kiang or Asiatic wild asses, the common ass and the zebra, the ass and bontequagga, the ass and the onager, the onager and the zebra, and the onager and the bonte-quagga.
The wild ass, Gorkhar of Persia (Equus onager), is frequent on the sandy tracts in the south-west.
A larger catapult called an onager fired stone shots weighing about 50kg and could hit a target 270 meters away!
The Romans adopted these weapons during the Punic Wars and further developed them, before introducing the new arrow-firing ballista and stone-throwing onager.