Is There a Possum?

Every so often i hear some sort of animal on my roof through the bathroom fence. It sounds like a possum, but it could also be a giant rat - why do you think that those are mutually exclusive? Anyway, this one time i kept some cooked bacon in my bathroom to lure it to my vents to take a look at what it was. But alas, my experiment was unsuccessful. They're not cu oh, god o go hang wa. That's whrs ruining everything. Ah, they're all over the place. They used to be nowhere, but in the last 30 years they've gotten everywhere,. Of course there is no such thing as an australian possum.