Horse outward similarity is an unreliable measure of relatedness. Besides the horse, there are six other species of genus "Equus" in the Equidae family. These are the ass or donkey, "Equus asinus"; the mountain zebra, "Equus zebra"; plains zebra, "Equus quagga"; Grévy's zebra, "Equus grevyi"; the kiang, "Equus kiang"; and the onager, "Equus hemionus". Horses can crossbreed with other members of their genus. The most common hybrid is the mule, a cross between a "jack" (male donkey) and a mare. A related hybrid, a hinny, is a cross between a stallion and a jenny (female donkey). Other hybrids include the zorse,
Equus (comics) him and leaving him without an arm. The arm is retrieved for attachment, and Orr sets the Legionnaires on Buddy Blank's tracks. In the 2008 "Cyborg" miniseries, the Titans are forced to fight numerous clones of Equus and the Wildebeest to prevent them from helping Victor Stone battle Mr. Orr's "Cyborg Revenge Squad". Equus is a human being who has undergone extensive genetic engineering, cybernetic enhancements, hormone therapy, and trans-species implantation as part of the One Man Army Corps (OMAC) project, which selected cancer patients as its subjects. Equus was the project's third version (or V3), immediately preceding his successor,