Villagers feed black-necked cranes in their village in Lhundrub county of the Xizang autonomous region. [Photo by Tadon/For chinadaily.com.cn]

Black-necked cranes in a river in the Sandrubtse district of Shigatse, Xizang autonomous region. [Photo by Tadon/For chinadaily.com.cn]

Black-necked cranes along the Kyichu River in Lhasa, capital of the Xizang autonomous region. [Photo by Tadon/For chinadaily.com.cn]

Black-necked cranes in a reservoir in Lhundrub county, Xizang autonomous region. [Photo by Tadon/For chinadaily.com.cn]

Wildlife rangers feed black-necked cranes in Lhundrub county, Xizang autonomous region. [Photo by Tadon/For chinadaily.com.cn]