The tarpan (Equus ferus ferus), also known as Eurasian wild horse, is an extinct subspecies of wild horse. The last individual believed to be of this subspecies died in captivity in Russia in 1909, although some sources claim that it was not a genuine wild horse due to its resemblance to domesticated horses.Beginning in the 1930s, several attempts were made to develop horses that looked like tarpans through selective breeding, called "breeding back" by advocates.