Grey cranes fly over a wetland by the Guanting reservoir in suburban Beijing, capital of China, March 11, 2017. Migratory birds passed by here and took a rest on their flyway to the north. (Xinhua/Li Xin)
Grey cranes fly over a wetland by the Guanting reservoir in suburban Beijing, capital of China, March 11, 2017. Migratory birds passed by here and took a rest on their flyway to the north. (Xinhua/Li Xin)