CHONGQING (CQNEWS) -- May 9 is the World Migratory Bird Day, during which the spring migrating birds of prey (commonly known as “eagles”) comes to Chongqing as promised. Due to mountainous landform, Chongqing has many species of birds of prey. In every migration season, a large number of birds pass by, and spectacular “river of eagles” and “column of eagles” can be seen. Therefore, Chongqing has become the “city of flying eagles” on the bird migration passage.