What are the modifications observed in birds that help them to fly?
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Flight adaptations found in birds
(i) Body is streamlined to reduce air resistance during
flight.
(ii) Forelimbs are modified into wings,
(iii) Wings have long quill feathers to increase the
efficiency of beating of wings.
(iv) Pneumatic bones are present to reduce the body weight.
(v) High metabolic rate to provide energy for flight.
(vi) Air sacs present in lungs help in double respiration.