*The bird’ body is perfectly adapted for aerial life. Various aerial adaptations found in birds are:**
1. Body shape: The body of birds is streamlined. Necks stretched forward with the head pointed in front and a narrowed tail at the end provide them a sleek shape. The body surface is smooth to minimize resistance against air.
2. Wings: The forelimbs are modified into wings. The fingers are very much reduced. The whole length of the forelimb carries long flight feathers.
3. Steering and brakes: The feathers on the tail help to slow down the speed and also help in steering (changing direction).
4. Wing muscles: These are the much strong, active and enlarged ** muscles.
5. Cutting down the body weight: Except for the most necessary bulky heavy wing muscles, the rest of the bird’* body tends to be light to facilitate flight.
Bones have air cavities.
Much less water is required in the body. The birds excrete solid ***** (formed of uric acid instead of urea which otherwise requires much water to be excreted out).
Right ovaiy and oviduct are greatly reduced.
