What are the differences between animals belonging the Aves group and those in the Mammalia group.

Aves includes the birds which have the following differences with mammals.
Aves:-
1. They are oviparous, i.e., lay eggs.
2. Do not have mammary glands.
3. Their bodies are covered with feathers.
4. Cutaneous glands are absents.
5. Teeth are absent.
6. Diaphragm is absent.
Mnmmslia:-
1. Most of them are viviparous, i.e., lay young babies.
2. Have mammary glands for the production of milk to nourish their young.
4. Their bodies are covered with hairs. Cutaneous glands such as sweat glands, scent glands and sebaceous (oil) glands are present in skin.
Teeth are present.
5. A muscular diaphragm separates thoracic and
6. abdominal cavities.