A group of swans forage and frolic in the Kaidu River in Bohu County, Bayingolin Mongol Autonomous Prefecture, northwest China's Xinjiang Uygur Autonomous Region.

The swans are under second-class state protection and are picky about the environment, including the water and air quality. Their appearance indicates the improved local environment. The swans will fly further southwards for the winter.

(Cover image via screenshot. Video provided by Nian Lei and Zhang Jia.)

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