Write adaptations for the flight of birds.

Most birds are adapted to flight. They have special body parts and internal devices for this. Birds have wings. Their body is covered with feathers of various types. Feathers are stiff. For example, the feathers on the wings and tail are hard. Birds have a lightweight and sturdy skeleton. They also have several air sacs. They are also important for flying. The digestive system of birds has a small intestine to reduce the weight of stored food in the body. Because of this, metabolism in birds is accelerated.