Mammals can give birth,where few animals cant
Bats can fly.
Its fur
Hair and milk.
Reptiles are cold blooded whilst mammals are warm blooded. Mammals have also developed fur.
A lot of characteristics that it has makes it an animal. For example it is a living organism, I responds to changes, reproduces etc. If you had asked me what makes a pig a mammals, I would certainly have more things to tell you. ;)
It lays its young in eggs.
genetics
Seals, whales, dolphins,walruses, and playpi! They are all mammals.
No. Platypi are different from other mammals because they lay eggs instead of giving birth to live young.
Dolphins, human beings, and chimpanzees are all mammals who have unusually high intelligence, compared to most other mammals. We are smart.
Little skin-like flaps in mammals skins help them glide. I think it is the same for insects.
the animals group is night animals specially bats