which of these is not needed by birds to fly
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Explanation:
Flying birds have large chest muscles that move the wings. Birds have feathers that help them fly. The long flight feathers on the wings and tail help birds balance and steer. In addition, birds have a system of air sacs in their body that connect to the lungs.
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Answer:
During flying in air birds usually fly in V shape because it's help in saving energy ,in measuring long distance .
Explanation:
The feather of birds in V shape during fly .
I hope it's helpful.
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