The common wombat is herbivorous. It feeds mainly on native grass, roots of shrubs and trees, sedges, matrushes, and fungi, using its forefeet to tear and grasp pieces of vegetation. Some individuals forage among refuse along the seashore. Its teeth are very much like those of rodents. Interestingly enough, the common wombat's teeth have adapted to breaking up its tough, highly fibrous food. Because of this, both upper and lower jaws have a single pair of incissors. These incissors are chisel-like and grow continuously, being kept to a reasonable size by constant wear.
Nowak (1983), Angus and Robertson (1983)