In pics: swans at Caofeidian wetland in N China

Swans are seen at the Caofeidian wetland in Tangshan, north China's Hebei Province, Feb. 25, 2023. (Xinhua/Yang Shiyao)

The Caofeidian wetland, located in the city of Tangshan, is an important habitat for the migratory birds. 

Swans fly over the Caofeidian wetland in Tangshan, north China's Hebei Province, Feb. 25, 2023. (Xinhua/Yang Shiyao)

Swans are seen at the Caofeidian wetland in Tangshan, north China's Hebei Province, Feb. 25, 2023. (Xinhua/Yang Shiyao)

Swans are seen at the Caofeidian wetland in Tangshan, north China's Hebei Province, Feb. 25, 2023. (Xinhua/Yang Shiyao)

Swans are seen at the Caofeidian wetland in Tangshan, north China's Hebei Province, Feb. 26, 2023. (Xinhua/Yang Shiyao)