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
Peter the Great (horse) white star on his forehead and on the left hind leg a white sock. Peter the Great established the American Standardbred bloodline through the Hambletonian 10 offspring Happy Medium. During his life, Peter the Great covered thousands of mares. His tail-male pedigree was Pilot Medium/Happy Medium/Hambletonian. His tail-female pedigree was Santos by Grand Sentinel/Swallow by Joe Hooker/Dixie by Sam Johnson's horse/Dam by Cumberland. Peter the Great (horse) Peter The Great (1895–1923) was an American Standardbred horse. A descendant of Hambletonian 10, he is considered one of the most important sires in the development of the modern Standardbred breed. Peter the