An egret is seen on a tree at Xihu park in Fuzhou, southeast China's Fujian Province, March 18, 2018. (Xinhua/Mei Yongcun)

A kingfisher is seen on a tree at Xihu park in Fuzhou, southeast China's Fujian Province, March 18, 2018. (Xinhua/Mei Yongcun)

A european blackbird is seen on a tree at Xihu park in Fuzhou, southeast China's Fujian Province, March 18, 2018. (Xinhua/Mei Yongcun)