
A crested ibis, an endangered bird species once believed to be extinct in China, is seen flying over a riverside in Ankang City, northwest China's Shaanxi Province, Aug. 21, 2017. (Xinhua/Xue Qinxue)

A crested ibis, an endangered bird species once believed to be extinct in China, is seen flying over a riverside in Ankang City, northwest China's Shaanxi Province, Aug. 21, 2017. (Xinhua/Xue Qinxue)