Wombats are big. These guys weight up to about 80 LBS and can be longer than a yard _and_ they dig holes - big holes about 2 ft in diameter and up to 60 feet in length! They kill predators that follow them into holes by allow them to get their head between the wombat and the top of the burrow and then they push up and crush or suffocate the predator (usually dingos, the Australian dog).

I have taken great care not to follow one down a hole so all is ok, but sometimes it's hard stopping myself because they are kind of cute.