Birds flap their wings and rise into the air. Science explains how a bird can travel in the air. How Birds Fly explains how a bird's body lets it fly high as well as the forces at work to keep it in the sky. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards.