Mallards fly over the lakeside of 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)
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Mallards fly over the lakeside of 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)
