A migrant bird looks for food in the Dongzhaigang National Nature Reserve in south China's Hainan Provine, Dec. 21, 2016. About 7,000 migrant birds arrived here to pass the winter recently. (Photo: Xinhua/Yang Guanyu)
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A migrant bird looks for food in the Dongzhaigang National Nature Reserve in south China's Hainan Provine, Dec. 21, 2016. About 7,000 migrant birds arrived here to pass the winter recently. (Photo: Xinhua/Yang Guanyu)
