Black storks seen at Beichuan river wetland park in Qinghai

A black stork flies over the Beichuan river wetland park in Xining City, northwest China's Qinghai Province, Dec. 6, 2020. Recently, the wetland park saw two black storks, a migratory bird species under first-class protection in China. There are only around 3,000 black storks now worldwide. (Xinhua/Wu Gang)