The thylacine was Australia's largest predator 3500 years ago when dingoes were introduced by human settlers.The thylacine resembled a large, short-haired dog with a stiff tail which smoothly extended from the body in a way similar to that of a kangaroo.
Despite its official classification as extinct, sightings are still reported, though none has been conclusively proven.
The thylacine has been described as a formidable predator because of its ability to survive and hunt prey in extremely sparsely populated areas.
The thylacine had become extremely rare or extinct on the Australian mainland before British settlement of the continent, but it survived on the island of Tasmania along with several other endemic species, including the Tasmanian devil.
Despite this, it is unrelated to any of the Northern Hemisphere predators.
They are easy to tell from a true dog because of the stripes on the back but the skeleton is harder to distinguish.