Migratory birds are seen at the Heihe River Wetland Natural Reserve in Zhangye City, Northwest China’s Gansu Province. The wetland is an important refuelling stop for birds during their migration. (Photo: China News Service/Wang Jiang)
Migratory birds are seen at the Heihe River Wetland Natural Reserve in Zhangye City, Northwest China’s Gansu Province. The wetland is an important refuelling stop for birds during their migration. (Photo: China News Service/Wang Jiang)
Migratory birds are seen at the Heihe River Wetland Natural Reserve in Zhangye City, Northwest China’s Gansu Province. The wetland is an important refuelling stop for birds during their migration. (Photo: China News Service/Wang Jiang)
Migratory birds are seen at the Heihe River Wetland Natural Reserve in Zhangye City, Northwest China’s Gansu Province. The wetland is an important refuelling stop for birds during their migration. (Photo: China News Service/Wang Jiang)