Black-necked cranes hover over Caohai National Nature Reserve in SW China

A flock of black-necked cranes are pictured at the Caohai National Nature Reserve, a popular destination among migratory birds, in Weining Yi-Hui-Miao Autonomous County, Bijie, southwest China's Guizhou Province, Nov. 16, 2020. (Photo by He Huan/Xinhua)