Chinese crested terns rest at the Minjiang River estuary wetlands in Fuzhou, southeast China's Fujian Province, April 7, 2020. (Xinhua/Mei Yongcun)

Wild ducks fly over the Minjiang River estuary wetlands in Fuzhou, southeast China's Fujian Province, April 7, 2020. (Xinhua/Mei Yongcun)

Little ringed plovers rest at the Minjiang River estuary wetlands in Fuzhou, southeast China's Fujian Province, April 8, 2020. (Xinhua/Mei Yongcun)

Black-faced spoonbills rest at the Minjiang River estuary wetlands in Fuzhou, southeast China's Fujian Province, April 7, 2020. (Xinhua/Mei Yongcun)

Black-faced spoonbills rest at the Minjiang River estuary wetlands in Fuzhou, southeast China's Fujian Province, April 7, 2020. (Xinhua/Mei Yongcun)