![Thousands of migrant birds gather at wetland for rest in Tianjin(4/6)](http://www.ecns.cn/hd/2017/11/16/ae46c077167f49cd943183acbd49518f.jpg)
Migrant birds fly over the Beidagang Wetland in Tianjin, north China, Nov. 15, 2017. Thousands of migrant birds gathered at the wetland for rest. (Xinhua/Yue Yuewei)
Migrant birds fly over the Beidagang Wetland in Tianjin, north China, Nov. 15, 2017. Thousands of migrant birds gathered at the wetland for rest. (Xinhua/Yue Yuewei)