The Przewalski Horse is the last true wild horse and the only surviving ancestor of the common horse. It is named after Russian Explorer Nikolai Przewalski who discovered the species in the 1870’s. The last wild Przewalski Horse was found in Mongolia in 1960. It is considered almost extinct in the wild . The population of these horses breed in captivity have been released into the wild in protected areas in Mongolia. The total population is about of a thousand specimens worldwide. The Nature Reserve of San Cebrian is home of two specimens of this species, which may be visited along with the bison of the park. They arrived at San Cebrian on October 24th, 2012.