Wombats are native Australian or Tasmanian mammals. Like many
       other antipodean animals, they have strange* reproductive
       habits (less so than the platypus which lays green eggs and is
       a monotreme). They also have constantly growing incisors allowing
       (nay, encouraging) them to chew on bark, wood, softer rocks,
       etc. (Wombats are friendly, loyal, nocturnal, and not overly
       intelligent. Sir Everard Home reports, "In captivity it is as
       a rule amiable, the amiability being possibly associated with
       stupidity." He probably woke it from a nap.)

       * strange to us-they wouldn't have it any other way.

       The family Vombatidae is divided into two groups: the naked nosed
       and the hairy nosed wombats. The naked nosed group constitutes
       the genus Vombatuis (or Phascolomis) and includes the Tasmanian
       wombat (V. Ursinus) from Tasmania and Flinders Island and the
       common Wombat (V. hirsutus) from south east Australia. These have
       coarse, harsh, blackish brown fur, a naked area on the muzzle,
       and short ears.

       The hairy nosed group contains Lasiorhinus latifrons from south
       Australia and wombatula gillespiei from southern Queensland.
       These species have silky grizzled gray fur, a hairy muzzle, and
       larger ears. The consequences of all this to wombat society is
       further complicated by the question of who has more ribs.