There are three orders of the class Mammalia: monotremes, marsupials, and placental mammals. Monotremes are the only mammals that lay eggs. There are only two egg-laying mammals on the planet: the duck-billed platypus and the spiny anteater (or echidna).
Besides, what are the 2 mammals that lay eggs?
There are only 2 mammals on earth that lay eggs; one is the platypus and the oth
One may also ask, what mammals lay eggs list? Echidna Platypuses Steropodon Steropodontidae Kollikodon
Also know, what are the 3 mammals that lay eggs?
The Extant (Currently Alive) Species of Egg-laying Mammals Are:
- The Duck-Billed Platypus.
- The Short-Beaked Echidna.
- The Eastern Long-Beaked Echidna.
- Sir David’s Long-Beaked Echidna.
- Western Long-Beaked Echidna.
Why do mammals lay eggs?
The platypus, found only in Australia is one of the five mammal species of that lay eggs instead of giving birth to live young. The other egg-laying mammals are four species of echidna. The reason that odd, egg-laying mammals still exist today may be because their ancestors took to the water, scientists now suggest.
14 Related Question Answers Found
Which animal lay eggs and give milk?
Duck Billed Platypus is the only animal that can give milk as well as eggs. It is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania.
Is a chicken a mammal?
Keeping in mind all the above-given information, it is quite evident that chickens are birds and not a mammal. Chickens like all other birds lay the egg and are covered with feathers. Not just that, mammals have mammary glands that chickens do not have.
Are hedgehogs born in eggs?
Hedgehogs do not lay eggs. Hedgehogs are mammals. But not even mammals like marsupials. They are full mammals who have live births.
Is a bird a mammal?
No, birds are not mammals. Birds do not give birth do live young nor do they feed their young through mammary glands.
Is a penguin a mammal?
Like other birds, penguins have feathers. Penguins are fish, mammals, or amphibians because they live in water, on land, or both. Penguins are birds, even though they spend time on land and in water. Their motion in the water more closely resembles flying than the swimming motion used by other animals.
Are monotremes Ovoviviparous?
A few mammals are also oviparous. These mammals are called monotremes and their most famous member is the duck-billed platypus. Ovoviviparous animals develop in eggs, but the eggs develop inside the mother or the father. Seahorses and some sharks are ovoviviparous.
Do pangolins lay eggs?
Pangolins give birth to live young When it comes to giving birth, however, not all mammals are the same. There are the monotremes, egg-laying mammals like the platypus and the echidna, which branched off from the mammal family tree back when egg-laying was the norm, and never lost that trait.
Which animal give eggs?
platypus
What mammals do not give birth to live babies?
Along with four species of echidna (a mammal that looks a bit like a porcupine), the platypus is one of only five species of monotremes in the world. Monotremes are mammals that lay eggs instead of giving birth to live young.
Do all mammals give birth?
Most mammals give birth to live young, but a few (the monotremes) lay eggs. Live birth also occurs in some non-mammalian species, such as guppies and hammerhead sharks; thus it is not a distinguishing characteristic of mammals.
Which is the smallest mammal?
Etruscan shrew
What classifies a mammal?
Mammal, (class Mammalia), any member of the group of vertebrate animals in which the young are nourished with milk from special mammary glands of the mother. In addition to these characteristic milk glands, mammals are distinguished by several other unique features.
Do monotremes have nipples?
Like other mammals, monotremes are warm-blooded. They have hair on their bodies and produce milk to feed their young. In echidnas, the female lays eggs into a pouch of skin on her stomach, where she carries them until they hatch. Although they have mammary glands, monotremes do not have nipples like other mammals.
What defines a mammal?
Definition of mammal. : any of a class (Mammalia) of warm-blooded higher vertebrates (such as placentals, marsupials, or monotremes) that nourish their young with milk secreted by mammary glands, have the skin usually more or less covered with hair, and include humans.