In the black-necked crane reserve of Lhunzhub County, Lhasa City, the Xizang Autonomous Region, a large number of wintering black-necked cranes are foraging and playing at the Hutoushan Reservoir. Lhunzhub County, located in the upstream of the Lhasa River, has an average altitude of about 4,200 meters and is one of the main wintering habitats for black-necked cranes.