What are the differences between animals belonging the Aves group and those in the Mammalia group.
Differences between Aves and Mammalia:
Aves | Mammalia |
Body is covered with feathers. | Body is covered with hairs. |
Bones are hollow with air cavity for flying. | Bone is not hollow. |
They are oviparous. | They are viviparous with few exceptions |
Mammary glands are absent | Mammary glands are present for nourish their young ones. |
Teeth are absent | Teeth are present. |
Diaphragm absent. | A muscular diaphragm separates thoracic and abdominal cavities. |