why is an ostrich not able to fly
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The primary reason why an ostrich can't fly actually has to do with their feathers as such. The individual barbules are not inter-locked like a flying bird's feather. This means the feathers offer no wind resistance for them to get of the ground. These are the two main reasons why ostriches can't fly.
The largest and heaviest living bird, the ostrich is flightless and instead is built for running. With its powerful legs, the ostrich can sprint in short bursts up to 43 mph (70 kph), and can maintain a steady speed of 31 mph (50 kph). ... So suggests new research into the DNA of the birds.
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an ostrich cannot fly because there body is not hollow it is heavy.
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