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,
Male and Female two famous scenes, indicative of de Mille's predilections as a filmmaker. The film is recognized by American Film Institute in these lists: "Male and Female" was released on Region 0 DVD-R by Alpha Video on January 28, 2014. Male and Female Male and Female is a 1919 American silent adventure/drama film directed by Cecil B. DeMille and starring Gloria Swanson and Thomas Meighan. Its main themes are gender relations and social class. The film is based on the J. M. Barrie play "The Admirable Crichton". A previous version was filmed the year before in England as "The Admirable Crichton". The