Migratory swans fly to C China's Yellow River wetland to spend winter

Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan)

Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

A swan flies over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

A swan is seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan)

Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan)

Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan)

Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan)

Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)

Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan)

A swan is seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan)

Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)