Photo taken on April 9, 2020 shows migrant birds at a heron protection base in Duchang County, east China's Jiangxi Province. In 2012, the county's forestry bureau set up a heron protection base to provide a better place to migrant birds to inhabit and breed. There are now nearly 7,000 migrant birds at the protection base. Photo:Xinhua

Photo taken on April 9, 2020 shows migrant birds at a heron protection base in Duchang County, east China's Jiangxi Province. In 2012, the county's forestry bureau set up a heron protection base to provide a better place to migrant birds to inhabit and breed. There are now nearly 7,000 migrant birds at the protection base. Photo:Xinhua

Photo taken on April 9, 2020 shows migrant birds at a heron protection base in Duchang County, east China's Jiangxi Province. In 2012, the county's forestry bureau set up a heron protection base to provide a better place to migrant birds to inhabit and breed. There are now nearly 7,000 migrant birds at the protection base. Photo:Xinhua

Photo taken on April 9, 2020 shows migrant birds at a heron protection base in Duchang County, east China's Jiangxi Province. In 2012, the county's forestry bureau set up a heron protection base to provide a better place to migrant birds to inhabit and breed. There are now nearly 7,000 migrant birds at the protection base. Photo:Xinhua