I am in first grade.Can you please tell me how can birds
moving their wings?
GI'm a naturalist, an engineer or ornithologist could give you a more
technical answer (maybe someone has), but simply put, the shape of the wings
creates lift when air moves over them in certain ways, just as a mechanical
glider's wings do. Also birds will find updrafts of rising air that will
help them soar for longer times without flapping.
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Update: June 2012