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Why running birds can’t fly but flying birds can?short answer

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Answer: I hope this helps you out

Step-by-step explanation:

Running birds, such as ostriches and emus, have heavily-built bodies and relatively small wings that are not well-suited for flight. Flying birds, on the other hand, have evolved for efficient flight with lightweight bodies and large, aerodynamic wings.

User Fasseg
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Answer:

running birds are heavy

User Pizzae
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