Whooper swans are seen in their winter habitat at the Rongcheng Swan National Nature Reserve in Weihai, Shandong province, on Nov 18. [Photos by Li Xinjun/For chinadaily.com.cn]

Whooper swans are spending the winter in Rongcheng, a county-level city under Weihai, Shandong province. They stay for around five months at the national nature reserve, with its bay and wetlands, making it one of the largest wintering grounds for whooper swans in the world.

Whooper swans are seen in their winter habitat at the Rongcheng Swan National Nature Reserve in Weihai, Shandong province, on Nov 18. [Photos by Li Xinjun/For chinadaily.com.cn]

Whooper swans are seen in their winter habitat at the Rongcheng Swan National Nature Reserve in Weihai, Shandong province, on Nov 18. [Photos by Li Xinjun/For chinadaily.com.cn]

Whooper swans are seen in their winter habitat at the Rongcheng Swan National Nature Reserve in Weihai, Shandong province, on Nov 18. [Photos by Li Xinjun/For chinadaily.com.cn]

Whooper swans are seen in their winter habitat at the Rongcheng Swan National Nature Reserve in Weihai, Shandong province, on Nov 18. [Photos by Li Xinjun/For chinadaily.com.cn]