A heron is seen at Shahu scenic area in Shizuishan, Northwest China's Ningxia Hui autonomous region, on April 24, 2020. Many migratory birds gather here for rest and reproduction from March to October every year. A bird-watching festival to be held here during the upcoming Labor Day holiday will be broadcast live online. [Photo/Xinhua]
Avocets search for food at Shahu scenic area in Shizuishan, Northwest China's Ningxia Hui autonomous region, on April 25, 2020. [Photo/Xinhua]
Migratory birds are seen at Shahu scenic area in Shizuishan, Northwest China's Ningxia Hui autonomous region, on April 25, 2020. [Photo/Xinhua]
A migratory bird is seen at Shahu scenic area in Shizuishan, Northwest China's Ningxia Hui autonomous region, on April 25, 2020. [Photo/Xinhua]
A migratory bird flies over Shahu scenic area in Shizuishan, Northwest China's Ningxia Hui autonomous region, on April 25, 2020. [Photo/Xinhua]
