List two adaptations that help a bird to fly

1] They have streamlined body which help them to fly.
2]Their body is flightless to fly easily.
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the birds have sreamlined body which cuts the air current and helps them to fly. their bones are hollow and light, helping them to fly.
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  1. THEY HAVE STREAMLINED BODY SHAPE WHICH REDUCES AIR RESISTANCE.
  2. THEY HAVE HOLLOW BONES THAT MAKE THEM LIGHT WEIGHT.
  3. THE HAVE WINGS MADE UP OF FEATHERS
  4. THEY HAVE VERY STRONG CHEST MUSCLES.
  5. THEY HAVE A LARGE LUNGS.
  6. THEY ARE HIGHLY ADAPTED FOR FLIGHT.
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1.They have streamlined bodies which helps them to fly .
2.Their bones are hollow which make them light to fly in air.
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they have hollow bones which help them to fly easy.
they have strong wings & chest muscles.
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List two adaptation in birds which help them to fly
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