they are natives of which place?
Eastern Australia, Tasmania
Platypus
The platypus ("Ornithorhynchus anatinus"), sometimes referred to as the duck-billed platypus, is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania.
are platypus the only mammals that lay eggs No - The four extant species of echidnas also lay eggs. what does its name mean? 'Platypus' is the latinisation of the Greek word, 'flat-footed'
wiki:25677052
Platypus [SEP] Introduction
The platypus ("Ornithorhynchus anatinus"), sometimes referred to as the duck-billed platypus, is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania. The platypus is the sole living representative of its family (Ornithorhynchidae) and genus ("Ornithorhynchus"), though a number of related species appear in the fossil record. Together with the four species of echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth to live young. Like other monotremes, it senses prey through electrolocation. It is one of the few species of venomous mammals, as the male platypus has a spur on the hind foot that delivers a venom capable of causing severe pain to humans.