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,
Donkey options over the other, and so would never make a decision. Italy has several phrases regarding donkeys, including "put your money in the ass of a donkey and they'll call him sir" (meaning, if you're rich, you'll get respect) and "women, donkeys and goats all have heads" (meaning, women are as stubborn as donkeys and goats). The United States developed its own expressions, including "better a donkey that carries me than a horse that throws me", "a donkey looks beautiful to a donkey", and "a donkey is but a donkey though laden with gold", among others. From Afghanistan, we find