Hi @Lisa.Jok, A Possum clearly and not Ring Tailed because it has more signs of its partly carnivorous lifestyle, i.e. stronger canine and premolar teeth and a sagittal crest for better attachment of strong jaw muscles. Great photos for skull ID, thanks, except a side view can often be helpful also as well as the main ones you took from above and below, and sometimes even a view from the back of the skull.