Blue sheep, or pseudois nayaur, at the Gahai-Zecha National Nature Reserve in Northwest China’s Gansu Province, March 3, 2016. Nearly 2,000 blue sheep now live in the nature reserve due to enhanced protection in recent years. They live on mountains 3,500 to 5,000 meters above sea level and excel at maneuvering on cliffs. (Photo: China News Service/Zhang Yong)
