How can a bird fly ?

July 5, 2007 3:18am CST
I really wounder why hen cannot fly but birds can fly since they are same speieces.
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2 responses
@karis1980 (577)
• India
5 Jul 07
Birds body is proportionate with their wings size. In case of hen the wings are smaller than the body's weight, so they can't fly.
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@Lydia1901 (16354)
• United States
8 Jul 07
I think the bones stracture beneath the wings that is able to make them fly and I think that isn't the same for every bird out there. And that is why some of them can fly and others can't.