There are tame possums around a park near where I used to live... one time I was walking home from a shop at about 1am and this cat wandered up to me and started sniffing my bag, so I said hello to it - then realised it was a possum!
Another time I was eating a pizza on a park bench and a possum jumped right onto my lap.
They're not really the sort of animal you'd want to get too close to, they have super sharp claws and make a pretty nasty hissing sound when they're angry...
I think possums are native to Australia, and we don't have squirrels
