Do Any Mammals Lay Eggs

The main differentiation within mammal species is between those which grow the fetus inside the body and those which lay eggs. Only two types of mammals lay eggs.

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The duckbill and the spiny anteater.

Do any mammals lay eggs. Egg laying mammals belong to a group called monotremes. Mammals are warm blooded animals that give birth to live young. The spiny anteater of which there are several varieties occur in australia tasmania and new guinea.

Long and short beaked echidna and platypus are the only mammals that lay eggs. Humans are mammals as are elephants lions buffaloes cats dogs sheep goats and many others. Yes there are egg laying mammals and they are known as monotremes.

Monotremes marsupials and placental mammals. There are only two species of mammals that lays eggs. There are only two egg laying mammals on the planet.

It is considered the ancestral state of mammals. The former are known as placental mammals as the baby is fed via placenta in utero. Other mammals evolved the ability to give birth to live young either as marsupial pouch bearing mammals like koalas and kangaroos or placental.

Otherwise no currently living mammals lay eggs. They do not have teats to nurse their young. Beside egg laying monotremes possess other traits that separate them from other mammals.

This article on animalsake discusses some important aspects related to these unique mammals. Mammals also lay eggs. All mammals have a type of sexual reproduction by which a cell from the female of a species is fertilized by a cell from the male.

The duckbill also called platypus is found in southern australia and tasmania. These include the platypus and the short beaked echidna native to australia and the long beaked. Are called monotremes and the only ones that survived today are the echidna and the platypus.

There are exceptions to every rule some reptiles and fish bear live young and some mammals lay eggs. There are only two mammals that lay eggs called monotremes the duck billed platypus ornithorhynchus and the spiny anteater echidna with four species. By definition mammals have live young with the exception of the three species of monotremes.

There are three orders of the class mammalia. Duckbills lay their eggs in nests built in burrows in the banks of streams. The egg is the organic vessel containing the zygote in which an embryo develops until it can survive on its own at which point the animal hatches.

They are named so because of the presence of single cloacal opening in their bodies that serves as a passage for eggs or sperms feces and urine. They are classified under the subclass prototheria and belong to the order monotremata. Monotremes are the only mammals that lay eggs.

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