Approach with caution: the platypus is the only poisonous mammal. It’s such a bizarre animal, that when the first type specimen pelts were sent to natural history museums, they were thought to be hoaxes.
They do not, however, have wings.
It is embarrassing not to know these things. (Although, to be fair, I’ve known this since grade school, and I’ve found plenty of other ways to embarrass myself.)
Ooh, looky: more platypus cartoons here and here. Actually, a google search for “platypus cartoons” turns up quite a few hits….)