乐彼之园： 北京永定河畔鸟类已达147种

Core Viewpoint - The article highlights the revival of the Yongding River in Beijing, which has become a significant ecological and cultural asset, supporting biodiversity and hosting major events in the city [1] Group 1: Ecological Restoration - The Yongding River, once nearly dried up, has undergone extensive ecological restoration efforts, including ecological replenishment and habitat recovery [1] - The river now supports a diverse range of bird species, with a total of 147 species recorded [1] Group 2: Cultural and Recreational Significance - The revitalized Yongding River has become an important venue for major events in Beijing, enhancing its role as a cultural landmark [1] - Key locations along the river, such as Shougang Park and the Garden Expo Park, contribute to the recreational and aesthetic value of the area [1]