Increasing number of migratory birds seen in Yellow River wetland
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Hundreds of thousands of birds have flocked to a wetland in the Yellow River in Zhengzhou, Central China's Henan Province. There're black storks, little swans, anas platyrhynchos, bean geese, and many more. These migratory birds come from the north. The wetland has seen an increase in the number of birds during the annual migration season every year.