With temperatures rising, wild ducks fly back from South China to the Gaya River in Tianqiaoling town, Yanbian Korean autonomous prefecture, Northeast China's Jilin province. [Photo provided by Jilin Tianqiaoling Forest Public Security Sub-bureau]

A goshawk flies over the Gaya River, which is unthawing as the weather gets warmer. [Photo provided by Jilin Tianqiaoling Forest Public Security Sub-bureau]

The white wagtail, a species under State protection, walks along the Gaya River. [Photo provided by Jilin Tianqiaoling Forest Public Security Sub-bureau]