Caohai lake: overwintering habitat for migratory birds in SW China

A flock of black-necked cranes are pictured in the Caohai lake in Weining County, southwest China's Guizhou Province, March 9, 2018. A state-level natural reserve, the Caohai lake in Guizhou is a major overwintering habitat for many migratory birds, most notably the black-necked cranes (Grus nigricollis). (Xinhua/Yang Wenbin)