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Quite simply, there are three species of mammals which lay eggs rather than giving birth to live young. These are the platypus, the short-beaked achidna and the long-beaked echidna. These mammals are still classified as mammals because they have fur, breathe using lungs and feed their young on mothers' milk. The last characteristic is the defining characteristic of all mammals, regardless of whether they are placental mammals, marsupials or monotremes (egg-laying mammals).

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Q: Not all mammals give birth to their young. Why?
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Animals that give birth to young?

All animals that give birth to live young are viviparous and are mammals.


What gives birth to live young?

All mammals, with the exception of monotremes (egg-laying mammals) give birth to live young.


What mammals give birth to their young alive?

All mammals give birth to live young, except those in the Monotreme order (echidnas and platypus), which lay eggs.


Does the walrus give birth birth to live young?

Yes they do, like all aquatic mammals they give birth to and nurse live young.


Do cheetahs lay eggs or give birth?

they give LIVE birthgive birth.Cheetahs are mammals, just like you. Their young are born alive and helpless, just as all we mammals were, and are suckled on their mother's milk, in the same way that all their fellow mammals are, including people.They give live birth, duhhh!They give birth to young.All mammals do except the duck billed platypus and echidna.they are mammals and so have live young almost all mammals have live young apart from 1 or 2 exceptions


Do dolphins give birth to live baby?

Yes they are Mammals so give birth to baby dolphins, like other mammals give birth.Yes, dolphins give birth to live young. They are mammals, belonging to the cetacean family (which includes whales) and all cetaceans give birth to live young.


Are dolphins and dogs mammals?

Yes. All mammals give birth to their young alive. The babies are not born from eggs. Mammals only give birth to alive babies.


Do hares lay eggs?

Hares are mammals. All mammals give birth to live young.


Do vertabrates give birth to live young?

A vertebrae is a life form with a spine. Humans are vertebraes as are all mammals, monotremes and amphibians..however not all of these give birth to live young, monotremes are mammals that lay eggs (there are only 2, platypus and echidna)...except for these, all other mammals give birth to live young. Some amphibians give birth to live young, but amphibians mostly lay eggs.


Do ponies give birth to eggs?

No! Ponies are mammals. All mammals except the echidna and duck-billed platypus give birth to live young.


What mammals give birth to live young?

All mammals have live birth except the echidna and the platypus, both of which lay eggs.


Why elephants are mammals?

Because they nurse their young, as all mammals do. They share other characteristics most mammals have: they are warm-blooded, vertebrates, have hair or fur, give birth to live young, and feed their young milk.