Birds stay light in the air because of how they fly. Their wings are like special flaps that help them push up against the air, and their bodies are made for flying, not just walking around on land. When birds flap their wings, it's like they're swimming through the sky! They use less energy than you do when you run or jump.
Examples
- A hawk flies in circles without flapping, it's just gliding.
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Categories: Science · birds,flight,aerodynamics