I heard an interview with Bob Brown on the ABC radio yesterday. He is a Tasmanian, former leader of the Australian Green Party, and an erstwhile Thylacine hunter. He reckons it was a spotted tail Quoll - which are common in that area and come out during the day this time of the year to build nests. I find it hard to argue with him, and it kind of makes me a Negative Nelly. But it fits in with the size of the animal and I am kind of inclined to go along with the more likely scenario.