How Do Birds Migrate? 

　　Many birds migrate to different places to spend winter or to produce their young in different seasons. Birdman usually divides them into the following types.

　　Resident birds: refers to birds that live in a certain place all year around and will not migrate as the seasons change.

　　Winter birds: refers to birds that fly to a certain place to spend winter in autumn and go back to the north to produce their young in the next spring.

　　Summer birds: refers to birds that come to produce their young during spring and fly back to the South to spend winter in autumn. 

　　Traveling birds: refers to birds, which, after a short stay in a certain place, will continue to migrate to the South or go back to the north.