There is a relatively new (last four or five years) population in Bundoora, Melbourne. They are all over the place. You see them all around the Melbourne zoo, including in many of the cages for other animals - gorillas, hippos, even the moats in front of the big cat enclosures, and generally running around all over the place. Many populations in several cities have popped up after animals have escaped (including babies which hatch from eggs in outdoor enclosures), and also after deliberate releases (often when someone buys a little one, catches a big one as a replacement and lets the one they purchased go). What puzzles me is that they haven't been further west under their own steam. I can't understand what has confined them to the east for the last hundred thousand years or so.