Swans gather at a wetland in Sanmenxia, central China's Henan Province, Nov. 25, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Lyu Guoqing)
A staff member feeds swans at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Lyu Guoqing)
Swans gather at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Lyu Guoqing)
A swan is seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Lyu Guoqing)
Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 25, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Zhu Xiang)
Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 25, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Lyu Guoqing)
Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Zhu Xiang)
Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 25, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Lyu Guoqing)
Swans gather at a wetland in Sanmenxia, central China's Henan Province, Nov. 25, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Lyu Guoqing)
Swans gather at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Zhu Xiang)
A swan hovers over a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Zhu Xiang)
Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Zhu Xiang)
Swans gather at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Zhu Xiang)
Swans gather at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Lyu Guoqing)
Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Zhu Xiang)
Swans gather at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Zhu Xiang)
Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 26, 2021. A large number of wintering swans have flocked to the wetland from Siberia. (Xinhua/Lyu Guoqing)