hey guys i just read your article on the front page about the echidna and thought id let you know that the echidna is not the most widespread native mammal in Australia,the most widespread native mammal is the kangaroo, there are more than twice the amount of roos in Oz than there are people. This means there are more than 44 million of them. anway just thought id let you all know. And yes a marsupial is still a mammal. D Atkin.