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2015-11-19T13:54:31+05:30

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1.The forelimbs of all the birds are modified in to wings which is useful for them to fly. 2.The bones of birds are hollow which decrises the weight hence it's help to fly. 3.there shap is like streamlined and spindle. this reduces the resistance while flying. 4.The exoskeleton is of feathers which make them lighter. 5.There are air sacsin their body which give buoyancy.
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2015-11-19T14:04:24+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
1: forelimbs of bird are modified in to life .  
2: shape is streamlined . 
3: exoskeleton is lighter .
4: they have wings for flight .
5: bones are hollow which decrease there weight .

i hope it helps..............................^_^

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