Question

Write a note on aves.

Answer 1

1. Birds are homeothermic (warm-blooded) animals with several adaptations to fly.
2. The spindle or boat-shaped body is divisible into the head, neck, trunk, and tail.
3. The body is covered with feathers. Forelimbs are modified into wings for flight.
4. Hindlimbs are adapted for walking, perching, or swimming.
5. The respiration is through the lungs, which have air sacs.
6. Bones are filled with air (pneumatic bones), which reduces body weight.
7. They lay large yolk-laden eggs.
8. They are covered by hard calcareous shells,
9. e.g. Parrot, Crow, Eagle, Pigeon, Ostrich.