The Australian Burrowing Animal is the WOMBAT, a 6 letter word. The WOMBAT is a marsupial native to Australia and is one of the few burrowing animals in the world. It is a stocky and muscular quadruped, and is known for its short legs, thick fur and large rear. It is nocturnal and spends most of its time in underground burrows, which it digs with its powerful claws. It is a herbivore and feeds on grasses, roots, and bark.