Because it has fur and feeds its young with milk. Those are two characteristics every mammal has.
two chains
Many of the theropod dinosaurs (the two-legged predators) were birdlike to varying degrees. Many if not all of them had feathers of some sort.
Warm blooded, has live birth.
Rats give birth to live young and suckle them.
The two definitive characteristics that make the platypus a mammal are: 1. It nurtures its young on mothers' milk. 2. It has fur. No other group of animals both these characteristics.
It produces milk for its young and has the many characteristics of a mammal
it means person with birdlike faetures it means person with birdlike faetures
eveloment of Placenta .
Alar and avian are birdlike qualities. They begin with the letter a.
Yes they are mammals.Yes, a leopard is a mammal.
billy joel