Question

Name Two adaptations that allow birds to fly.

Answer 1

Sample Response: Several adaptations make it possible for many birds to fly. First, birds have wings. Flying birds have large chest muscles to move their wings. Contour feathers help birds balance and steer as they fly. Because a bird’s bones are mostly hollow, they are very lightweight.

Answer 2

The bodies of birds are adapted for flying. Many of a bird's bones are less dense than human bones, which makes birds' bodies lightweight. Flying birds have large chest muscles that move the wings. Birds have feathers that help them fly.