What are the differences between animals belonging to the Aves group and those in the mammalia group?
|
Aves |
Mammals |
| Most birds have feathers and they possess a beak. | They do not have feathers and the beak is also absent. |
| They lay eggs. Hence, they are oviparous. | Some of them lay eggs and some give birth to young ones. Hence, they are both oviparous and viviparous. |
