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,
Axworthy (horse) New York at an auction in Madison Square Garden, New York. From there he was sent to Parkville Farms. Ones more in the sale ring 1906 he was sold to William Simpson and sent to Lexington, Kentucky. Axworthy was a tall studhorse of impressive conformation, with a grand slashing stroke. He was of a light chestnut color. Gait and early speed was transmitted to his offspring. Tail-male pedigree: Axtell - William L. - George Wilkes - Hambletonian.<br> Tail-female pedigree: Marguerite by Kentucky Prince - Young Daisy by Strideaway - Daisy. Axworthy (horse) Axworthy (1892–1917) was an American Standardbred horse. A