Perhaps best known are the "ballista", the "onager", and the "scorpio". Asiatic cheetahs may have preyed on onager foals. The dorsal stripes of the onager and kiang are dark brown and especially vivid. Deer, gazelle and onager were also hunted. The onager is preyed upon by apex predators such as Persian leopard and striped hyenas. An attack by a leopard on an onager ("Equus hemionus") was also recorded. The oldest divergence of "Equus" was the onager followed by the zebras and onwards. The Roman version was called an "onager". A few cases of onager deaths due to predation by leopards were recorded in Iran. This habitat overlaps to 61% with wild sheep, 36% with onager, and 30% with gazelle. Debates over the taxonomic identity of the onager occurred until 1980. The Persian onager is found in two subpopulations in southern and northern Iran. They also made use of a one armed torsion stone-projector named the onager. It houses takins and the zoo's bison, and an onager. Sometimes, the term "onager" is reserved specifically for this subspecies.