Migratory birds fly over wetlands of Yalu River in China's Dandong
Flocks of migratory birds fly in the sky over the wetlands of the Yalu River in Dandong, northeast China's Liaoning Province, April 4, 2016. (Xinhua/Wang Hua)
Flocks of migratory birds fly in the sky over the wetlands of the Yalu River in Dandong, northeast China's Liaoning Province, April 4, 2016. (Xinhua/Wang Hua)
Flocks of migratory birds fly in the sky over the wetlands of the Yalu River in Dandong, northeast China's Liaoning Province, April 4, 2016. (Xinhua/Wang Hua)
Flocks of migratory birds fly in the sky over the wetlands of the Yalu River in Dandong, northeast China's Liaoning Province, April 4, 2016. (Xinhua/Wang Hua)
Flocks of migratory birds fly in the sky over the wetlands of the Yalu River in Dandong, northeast China's Liaoning Province, April 4, 2016. (Xinhua/Wang Hua)