Poyang Lake, in Jiangxi Province, is the largest freshwater lake in China. It provides habitat for half a million migratory birds and during the winter, the lake is home to a large number of migrating Siberian cranes. The lake's volume fluctuates between the wet and dry seasons, but drought, sand quarrying, and the upriver Three Gorges Dam have substantially reduced the lake's size from around 3,500 square kilometres to to a low of about 200 square kilometres.
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