The grasslands, plateau and deserts of northern and western China are home to several species of antelope. The Mongolian gazelle, also known as the Zeren or yellow sheep, can run at speeds of up to 90 km/h and gather in herds by the thousands. They used to be spread over much of northern China but are now confined largely to Inner Mongolia. The Tibetan gazelle or goa antelope, is slightly smaller than the Mongolian gazelle, and lives on the Tibetan Plateau. The Przewalski's gazelle, whose males have distinctive horns that curl outward and then inward at the top, are extremely rare and endemic to a small region around Qinghai Lake on the northeastern part of the Tibetan Plateau. The goitered gazelle is about the same size as the Mongolian gazelle and is found throughout the Gobi Desert.