OK, you are probably wondering why I am so certain that the Thylacine is extinct. It's hard to prove something's not there, so I'd be pleased to be wrong, but here's my logic.
First up, the Thylacine was a plains animal. It liked a bit of bush to lay up in, but it did most of its hunting over grassland. From this I draw two conclusions:
- the deep bush sightings are unlikely to be Thylacines
- given Tasmanian patterns of land use we should see a lot more of them, if they were there
So, sorry, I really don't believe there are any ...