Photo taken on May 27, 2021 shows the Yellow River Wetland Reserve in Mengjin District, Luoyang City, central China's Henan Province. Many herons forage and perch there, forming a beautiful scenery. (Jia Fangwen/Guangming Picture)

Photo taken on May 27, 2021 shows the Yellow River Wetland Reserve in Mengjin District, Luoyang City, central China's Henan Province. Many herons forage and perch there, forming a beautiful scenery. (Jia Fangwen/Guangming Picture)

Photo taken on May 27, 2021 shows the Yellow River Wetland Reserve in Mengjin District, Luoyang City, central China's Henan Province. Many herons forage and perch there, forming a beautiful scenery. (Jia Fangwen/Guangming Picture)

来源：GMW.cn