Neither one is "poisonous", but an adult male platypus has a venomous spur through which it can deliver a powerful and agonising venom.
The echidna does not have poison. Although it does have spurs on its hind legs (like the platypus) it is not poisonous.
No. The echidna has no venom in its spines or anywhere else. Like a platypus, the male echidna has a spur on its hind leg, but unlike the male platypus, the echidna's spur is not connected to a venom gland.
Platypus Echidna
The Platypus and the Echidna are the only mammals that are Oviparous.
The platypus and the echidna are the world's only two known egg-laying mammals. They are classified as monotremes.
The two monotremes are the platypus and the echidna. There is just one species of platypus, and two species of echidna - the long-beaked echidna, found in New Guinea, and the short-beaked echidna, found only in Australia. The platypus is also found only in Australia.
The two monotremes are the echidna and the platypus.
The platypus and echidna are recognised as egg-laying mammals. They are monotremes, which are egg-laying mammals.
The platypus's spur is sharp and attached to a venom gland in the platypus's thigh. The echidna's spur is blunt, and is not attached to a functional venom gland.
The platypus is a monotreme, which is an egg-laying mammal. The only other animal in this group is the echidna. There are two species of echidna: the short-beaked echidna, which is found in Australia, just like the platypus; and the long-beaked echidna, which is only found on the island of New Guinea.
The platypus is found only in Australia. The common echidna known as the short-beaked echidna lives in Australia, but the long-beaked echidna lives in New Guinea.
No, platypus are not poisonous or venomous.