True Flight

What is true flight? True flight is to fly with muscle power. Insects, birds and bats use muscle power to flap their wings. These animals flap their wings up and down. Insects, birds, and bats are the only true fliers.

A butterfly is an insect.

A hummingbird is a type of bird.

And a bat is a mammal.

Animals that fly have special body parts to help them move through the air. These animals all have wings and are lightweight.

This is an ancient flyer named Pterosaur. The Pterosaurs lived millions of years ago. Some of these had wings as big as airplane wings. Look at the Pterosaur's body.

Look at the body of an airplane. Compare them. Both their bodies are made for flying. They can fly.

A long time ago people wanted to fly like birds. People tried to fly like a super hero. People can not fly like insects, birds, bats or super heroes.

Man invented the airplane. People can fly on airplanes.

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Last modified: Mon Jul 7 11:16:22 PDT 1997