List a fer'flight adaptations in birds.

Fight adaptations of the birds are the following:

(1) Forelimbs are modified into wings for flying.

(2) Body is light as they have hollow (pneumatic) bones.

(3) Body is streamlined to reduce air resistance during flight.

(4) Flights muscles are well developed.

(5) Body is covered with exoskeleton of water-proof and light-weight feathers.

(6) They have actue vision.