How do bird wings work?

how do bird wings work?also how do they fly?
Asked Feb 05, 2010
Well for starters, birds bones are hollow, making them much lighter. So when a bird flaps its wings, it displaces air below it, and that air is proportional to the size and weight of the bird itself. By pushing air down, a bird is literally lifting it's own body into the air. I can get more technical if you need me to.
Answered Feb 05, 2010
well they flap ther wings to get up more speed then they speed off!
Answered Feb 06, 2010
This is highly inaccurate. Please read my answer to understand how it works. What you described is how a plane works, minus the flapping.

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