Question

Explain the different features that help birds to fly.( any 3)​

Answer 1

Physical features

Flying birds have:

• lightweight, smooth feathers – this reduces the forces of weight and drag
• a beak, instead of heavy, bony jaws and teeth – this reduces the force of weight
• an enlarged breastbone called a sternum for flight muscle attachment – this helps with the force of thrust
• light bones – a bird’s bones are basically hollow with air sacs and thin, tiny cross pieces to make bones stronger – this reduces the force of weight
• a rigid skeleton to provide firm attachments for powerful flight muscles – this helps with the force of thrust
• a streamlined body – this helps reduce the force of drag
• wings – these enable the force of lift.

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Answer 2

Answer:

lightweight, smooth feathers – this reduces the forces of weight and drag.

a beak, instead of heavy, bony jaws and teeth – this reduces the force of weight.

an enlarged breastbone called a sternum for flight muscle attachment – this helps with the force of thrust.