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There are two egg-laying mammals, and they both lay eggs with leathery shells, rather than hard shells, like birds' eggs. The platypus and the echidna are both egg-laying mammals, or monotremes. They are still classified as mammals because they feed their young on mothers' milk - a characteristic unique to mammals alone.
There are just three known species of egg-laying mammals, or monotremes. They are the platypus and short-beaked echidna (Tachyglossus aculeatus) of Australia, and the long-beaked echidna (Zaglosssus bruijni) of Papua New Guinea. The echidna is sometimes called the spiny anteater, and there are several sub-species of the long-beaked echidna: the Western long-beaked echidna, Sir David's long-beaked echidna and the Eastern long-beaked echidna.
What else can I help you with?
Why are turtles eggs leathery?
Their eggs are leathery so they can get out of their shells easily
What is the function of the leathery shell for a reptile egg?
The leathery shell of a reptile egg is to simply protect the eggs from any predators.
What are the tough leathery eggs of reptile and birds are called?
amnionic eggs
Is a bird's egg leathery?
No, they are usually hard-shelled. Snakes eggs are leathery.
Do penguins lay eggs with hard shells?
Yes. Penguins are birds, and birds reproduce by laying eggs with hard shells. This is different from the eggs of reptiles and monotremes, which have leathery shells.
How do reptile eggs survive on land?
They have waterproof (but soft) shells and the reptile usually buries them.
Are platypus eggs soft or hard?
Platypus eggs are soft and leathery, rather than hard-shelled.
Do reptiles have hard shaped eggs?
No, the shells are leathery and soft, making them easier to bury and cover in dirt.
How does a reptile embryo in an amniotic shell get oxygen?
THe shells of reptile eggs is porous - it absorbs oxygen through the membrane.
Is an alligator a animal?
They are classified as 'Reptilia' as they lay eggs and are not 'live' bearers
What are two reptile-like characteristics in the platypus?
The only reptile-like characteristic which platypuses have is the fact that they reproduce by laying soft-shelled, leathery eggs (and not all reptiles lay eggs, either). Apart from that, these creatures fit all the characteristics of mammals.
What type of eggs do both reptiles and birds lay?
Yes. Bird eggs are similar in structure to reptile eggs with the main difference being that bird eggs have a hard shell while reptiles eggs have a softer, leathery shell.
