In pics: migratory birds in NE China's Heilongjiang

A drone photo taken on Oct. 10, 2026 shows swans at sunset in the Greater Khingan range in northeast China's Heilongjiang Province. (Photo by Zhuang Yu/Xinhua)

This photo taken on Oct. 11, 2026 shows migratory birds flying at sunset in Qiqihar City, northeast China's Heilongjiang Province. (Photo by Wang Yonggang/Xinhua)

A drone photo taken on Oct. 4, 2026 shows migratory birds flying over the Naolihe National Natural Reserve in northeast China's Heilongjiang Province. (Photo by Gao Xiangtong/Xinhua)

An aerial drone photo taken on Oct. 11, 2026 shows migratory birds at the Harbin section of Songhua River in northeast China's Heilongjiang Province. (Photo by Zhang Shu/Xinhua)

A drone photo taken on Oct. 7, 2026 shows oriental white storks at a wetland in Daqing City, northeast China's Heilongjiang Province. (Photo by Chi Shiyong/Xinhua)

A drone photo taken on Oct. 11, 2026 shows swans at a water area in Daqing City, northeast China's Heilongjiang Province. (Photo by Chi Shiyong/Xinhua)

A drone photo taken on Oct. 11, 2026 shows migratory birds at a national wetland park in Shuangyashan City, northeast China's Heilongjiang Province. (Photo by Han Yang/Xinhua)

This photo taken on Oct. 11, 2026 shows herons in Qiqihar City, northeast China's Heilongjiang Province. (Photo by Wang Yonggang/Xinhua)

A drone photo taken on Oct. 11, 2026 shows migratory birds at the Fujin National Wetland Park in Fujin City, northeast China's Heilongjiang Province. (Photo by Chen Zhiguo/Xinhua)

A drone photo taken on Oct. 11, 2026 shows migratory birds at the Fujin National Wetland Park in Fujin City, northeast China's Heilongjiang Province. (Photo by Qu Yubao/Xinhua)

A drone photo taken on Oct. 11, 2026 shows swans at sunrise in the Greater Khingan range in northeast China's Heilongjiang Province. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on Oct. 7, 2026 shows red-crowned cranes at the Sanhuanpao National Nature Reserve in northeast China's Heilongjiang Province. (Photo by Qu Yubao/Xinhua)

This photo taken on Oct. 8, 2026 shows oriental white storks in Daqing City, northeast China's Heilongjiang Province. (Photo by Liu Chengshan/Xinhua)

This photo taken on Oct. 10, 2026 shows migratory birds resting on a tree at an island in Tongjiang City, northeast China's Heilongjiang Province. (Photo by Liu Wanping/Xinhua)

A drone photo taken on Oct. 8, 2026 shows migratory birds at a wetland in Daqing City, northeast China's Heilongjiang Province. (Photo by Chi Shiyong/Xinhua)

A drone photo taken on Oct. 11, 2026 shows swans at a water area in Daqing City, northeast China's Heilongjiang Province. (Photo by Chi Shiyong/Xinhua)