Swans swim in the Caofeidian Wetland of Tangshan, Hebei province. (Photo by Nie Yongli/For chinadaily.com.cn)

As temperatures in North China pick up, hundreds of swans flock to the Caofeidian Wetland in Tangshan, Hebei province, to roost and forage for food.

Each year in early spring, the sleek guests come, bringing vitality to the wetland and creating picturesque views.

According to local authorities, Caofeidian district in Tangshan has strengthened ecological protection in recent years, which helped improve the local ecological environment and increase the number of rare migratory birds.