The bharal or blue sheep is the most abundant mountain ungulate in the Ladakh region, although it is not found in some parts of Zangskar and Sham areas. The Asiatic ibex is a very elegant mountain goat that is distributed in the western part of Ladakh. It is the second most abundant mountain ungulate in the region with a population of about 6000 individuals. It is adapted to rugged areas where it easily climbs when threatened. The Ladakhi Urial is another unique mountain sheep that inhabits the mountains of Ladakh. The population is declining, however, and there are not more than 3000 individuals left in Ladakh. The urial is endemic to Ladakh, where it is distributed only along two major river valleys: the Indus and Shayok. The animal is often persecuted by farmers whose crops are allegedly damaged by it. Its population declined precipitously in the last century due to indiscriminate shooting by hunters along the Leh-Srinagar highway. The Tibetan argali or Nyan is the largest wild sheep in the world, standing at the shoulder with the horn measuring . It is distributed on the Tibetan plateau and its marginal mountains encompassing a total area of . There is only a small population of about 400 animals in Ladakh. The animal prefers open and rolling terrain as it runs, unlike wild goats that climb into steep cliffs, to escape from predators. The endangered Tibetan antelope, known as "chiru" in Indian English, or Ladakhi "tsos", has traditionally been hunted for its wool ("shahtoosh") which is a natural fibre of the finest quality and thus valued for its light weight and warmth and as a status symbol. The wool of chiru must be pulled out by hand, a process done after the animal is killed. The fibre is smuggled into Kashmir and woven into exquisite shawls by Kashmiri workers. Ladakh is also home to the Tibetan gazelle, which inhabits the vast rangelands in eastern Ladakh bordering Tibet.