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Answer on Other Biology Question for dure shahwar

Question #66052
how do birds fly easily in air?
Expert's answer
Birds are flying by flapping their wings up and down as well as forward through the air. Vertical motion of the wing is greatest farther away from the body.Closer to the body, wing movement is primarily horizontal.

Apart from that, birds have a number of other body specifics allowing an easy flight: empty tube bones, quick metabolism without agglomeration of fecal masses.

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