Migrant birds winter at Chongming Dongtan National Nature Reserve in Shanghai

Migrant birds are pictured at Chongming Dongtan National Nature Reserve in east China's Shanghai, Nov. 12, 2024. A large number of migrant birds winter at the reserve. (Xinhua/Wang Xiang)

This photo taken on Nov. 12, 2024 shows an egret flying at Chongming Dongtan National Nature Reserve in east China's Shanghai. A large number of migrant birds winter at the reserve. (Xinhua/Wang Xiang)

Migrant birds are pictured at Chongming Dongtan National Nature Reserve in east China's Shanghai, Nov. 12, 2024. A large number of migrant birds winter at the reserve. (Xinhua/Wang Xiang)

Migrant birds are seen at Chongming Dongtan National Nature Reserve in east China's Shanghai, Nov. 12, 2024. A large number of migrant birds winter at the reserve. (Xinhua/Li Bo)

A heron flies at Chongming Dongtan National Nature Reserve in east China's Shanghai, Nov. 12, 2024. A large number of migrant birds winter at the reserve. (Xinhua/Li Bo)

Tundra swans fly over Chongming Dongtan National Nature Reserve at sunset in east China's Shanghai, Nov. 12, 2024. A large number of migrant birds winter at the reserve. (Xinhua/Li Bo)

An egret flies at Chongming Dongtan National Nature Reserve in east China's Shanghai, Nov. 12, 2024. A large number of migrant birds winter at the reserve. (Xinhua/Li Bo)

Tundra swans fly over Chongming Dongtan National Nature Reserve at sunset in east China's Shanghai, Nov. 12, 2024. A large number of migrant birds winter at the reserve. (Xinhua/Wang Xiang)

This photo taken on Nov. 12, 2024 shows an egret flying at Chongming Dongtan National Nature Reserve in east China's Shanghai. A large number of migrant birds winter at the reserve. (Xinhua/Dai Qiaochu)

Trundra swans fly over Chongming Dongtan National Nature Reserve in east China's Shanghai, Nov. 12, 2024. A large number of migrant birds winter at the reserve. (Xinhua/Li Bo)

Migrant birds are pictured at Chongming Dongtan National Nature Reserve in east China's Shanghai, Nov. 12, 2024. A large number of migrant birds winter at the reserve. (Xinhua/Wang Xiang)

This photo taken on Nov. 12, 2024 shows an egret flying at Chongming Dongtan National Nature Reserve in east China's Shanghai. A large number of migrant birds winter at the reserve. (Xinhua/Fang Xin)