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

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