Equus (genus) a female horse. With rare exceptions, these hybrids are sterile and cannot reproduce. A related hybrid, a hinny, is a cross between a male horse and a female donkey. Other hybrids include the zorse, a cross between a zebra and a horse and a zonkey or zedonk, a hybrid of a zebra and a donkey. In areas where Grévy's zebras are sympatric with plains zebras, fertile hybrids do occur. Equines have significant differences in size, though all are characterized by long heads and necks. Their slender legs support their weight on one digit (which evolved from the middle digits). Grévy's
Tourist (horse) was a late developing horse who won back-to-back Breeders' Cup Classics, and is known for siring offspring that also tend to develop later in their career and are best at a distance of a mile and up. Tiznow is the most important modern descendant of Man o' War in the direct male line – the sire line traces back to the Godolphin Arabian. Tourist's dam, Unbridled Melody by Unbridled's Song, comes from a strong female family that has produced multiple stakes winners in recent generations. Unbridled Melody produced five named foals, four of them stakes winners. Tourist has been described