Mallards search for food at a wetland in Qinhuangdao, a coastal city in north China's Hebei Province, Feb. 1, 2016. The coastal wetland attracts lots of migrant birds to spend winter. (Xinhua/Yang Shiyao)
Mallards search for food at a wetland in Qinhuangdao, a coastal city in north China's Hebei Province, Feb. 1, 2016. The coastal wetland attracts lots of migrant birds to spend winter.
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