The only felines native to Australia are the native cats, also known as wild cats, which are actually small, wild cats introduced by humans. They are not native to Australia.
However, Australia does have a rich history of megafauna, including extinct giant marsupials that filled ecological niches similar to those of large cats in other parts of the world. These include:
* Thylacoleo carnifex (marsupial lion): A large predator with powerful jaws and sharp teeth.
* Diprotodon optatum (giant wombat): A herbivore that was one of the largest marsupials ever.
* Procoptodon goliah (giant kangaroo): A massive kangaroo that could stand up to 3 meters tall.
These animals went extinct thousands of years ago, likely due to a combination of factors including climate change and the arrival of humans.