Wildlife paradise: Changtang National Nature Reserve in Tibet

A ruddy shelduck and a flock of barhead geese fly over a wetland in Nyima County, southwest China's Tibet Autonomous Region, Sept. 19, 2017. Changtang National Nature Reserve is a wildlife paradise and home to a variety of wildlife species such as Tibetan antelopes, wild yaks, Tibetan wild donkeys and black-necked cranes. [Photo: Xinhua/Zhang Rufeng]

Two Tibetan wild donkeys gallop on a pasture in Nyima County, southwest China's Tibet Autonomous Region, Sept. 19, 2017. Changtang National Nature Reserve is a wildlife paradise and home to a variety of wildlife species such as Tibetan antelopes, wild yaks, Tibetan wild donkeys and black-necked cranes. [Photo: Xinhua/Zhang Rufeng]

Tibetan antelopes gallop on a pasture in Nyima County, southwest China's Tibet Autonomous Region, Sept. 19, 2017. Changtang National Nature Reserve is a wildlife paradise and home to a variety of wildlife species such as Tibetan antelopes, wild yaks, Tibetan wild donkeys and black-necked cranes.  [Photo: Xinhua/Zhang Rufeng]

Black-necked cranes are seen on a wetland in Nyima County, southwest China's Tibet Autonomous Region, Sept. 19, 2017. Changtang National Nature Reserve is a wildlife paradise and home to a variety of wildlife species such as Tibetan antelopes, wild yaks, Tibetan wild donkeys and black-necked cranes. [Photo: Xinhua/Zhang Rufeng]