Thylacoleo co-existed with other megafauna, which included herbivores such as giant kangaroos three metres tall, possums and wombat-like animals up to the size of small rhinos, called diprotodontids.

This Thylacoleo was discovered recently in a remote part of the Western Australian Nullarbor Plain. The bones of several other types of extinct animals, including giant wallabies and kangaroos were also found.

This site is now recognised as one of the most important megafauna sites in Australia.

The undisturbed nature of this Thylacoleo specimen, apparently lying in the exact position in which it died tens or even hundreds of thousands of years ago, allowed scientists to take samples of ancient DNA and other samples for dating and forensic tests while onsite.