Habitat for Swans: Heihe Wetland in Gansu
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Swans are seen on Heihe River of Gaotai County in Zhangye City, northwest China's Gansu Province, December 10, 2009. [Xinhua]
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Swans are seen on Heihe River of Gaotai County in Zhangye City, northwest China's Gansu Province, December 10, 2009. [Xinhua]
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