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,
The Adventures of a Donkey is transferred to the care of Mr Staples. Jemmy's new home is an old shed he shares with Balaam and another donkey named Juba. Jemmy and Balaam reminisce and Jemmy tells Balaam of his travels since he left Mr Howel's farm. Later, Jemmy is sent out to work where he and other donkeys give rides to children on a hill side. His first passenger is a young lady named Lady Harriet; they ride to Lady Harriet's home where her mother and father see how fond she is of Jemmy and decide to buy him. Jemmy is thrilled by the news