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INTRODUCTION
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The common
wombat is the largest burrowing herbivorous mammal. Indeed, it is such an
accomplished burrower that
early settlers called it a 'badger', a term that is still heard today.
However, the closest relative of the wombat is, in
fact, the koala. With its short tail and legs, characteristic waddle and
'cuddly' appearance the wombat is one of the
most endearing of Australia's native animals. |
DESCRIPTION
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There are three
subspecies of common wombat -- Vombatus ursinus hirsutus which is found on
the mainland, Vombatus ursinus tasmaniensis which is found in Tasmania and
Vombatus ursinus ursinus which was once found throughout the Bass Strait
islands but is now restricted to Flinders Island. The common wombat
was once found throughout south eastern Australia but now, partly as a result
of European settlement, is restricted further to the south. It occupies
Tasmania, eastern New South Wales and eastern Victoria with scattered
populations in south eastern South Australia and south western Victoria. There
are two other species of wombat, both found on mainland Australia - the
southern hairy-nosed wombat and the threatened northern hairy-nosed wombat. |
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It is a fairly large, solidly
built animal with a squat, round, bear like body, small ears and eyes, and a
large naked nose. Its thick, coarse fur varies in colour from sandy brown to
grey and black, and is sometimes flecked with fawn. Often their true
colour is obscured by the colour of the dirt or clay in which they have been
digging. On the mainland they average 1 m in
length and 27 kg in weight yet can reach up to 1.2 m in length and weights of up
to 35 kg. The Tasmanian Wombat is not as large or bulky, averaging 85 cm in
length and 20 kg in weight, while the Flinders Island wombat is smaller still at
only 75 cm in length.
They have short legs, large paws and long, strong claws which are used in the
excavation of burrows.
The forepaws are used for digging and after pushing the dirt to one side the
wombat will back out,
moving the loose dirt with both the front and back paws. It differs from all
other marsupials by having a
single pair of upper and lower incisors (front teeth).
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These teeth are never
ground away as they are both rootless and never stop growing; which is just
as well as the wombat often uses them for cutting through obstructions, much
like a beaver! Being marsupials, female wombats have a pouch that in their
case
opens backward to prevent dirt and debris entering while burrowing. |
HABITAT
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In Tasmania the wombat is widespread
and found from sea level to alpine areas but shows a preference for
heathland, coastal scrub and open forest, where soils favour their burrowing
habits. Wombats often dig their burrows in the areas above creeks and
gullies. Burrows can be up to 20 m long and more than 2 m below the ground,
and have numerous connecting tunnels and entrances. There may also be more
than one nest in the burrow, which they make from sticks, leaves and
grasses. Wombats are mostly nocturnal, usually coming out at night to graze
when temperatures are lower. However, in cold periods they may sometimes be
seen about during the day either grazing or basking in the sun. They graze
for between 3 and 8 hours a night, during which time they may travel many
kilometres and visit up to four burrows within their home range to rest or
tidy up the burrow. Although they are solitary animals, with only one wombat
inhabiting any one burrow, the overlap of home ranges does occasionally
result in a number of wombats using the same burrow. |
DIET
| The diet of the wombat is composed
entirely of plant material. Its main food is native grasses but shrubs,
roots, sedges, bark and herbs are also eaten, while moss seems to be a
particular delicacy. At times of food shortages they may dig up sections of
dead grass to get at the roots. When feeding, the front feet of wombats are
surprisingly dextrous -- they can pick up vegetation with one foot and
'hand' it to the mouth! |
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BREEDING
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Although the wombat may breed at any time of the year, mating most often
occurs during winter. The female has 2 teats in her pouch yet despite this,
30 days after mating, only one young is born. The juvenile remains in the
pouch for 6 months, after which it stays with the female up until it is 18
months old. From the time the juvenile leaves the pouch it begins to
substitute increasing amounts of plant material for milk until, when about
15 months old, it stops suckling altogether. |
Sexual maturity is reached
at 2 years of age and wombats live for in excess of 5 years in the wild. Due to
the long period of time that the young is dependent on the mother, it is likely
that females only rear one young every two years. However, if the young dies
early, or if conditions are good enough for it to leave the pouch early, she may
raise another. CONCLUSION
| V.u.ursinus is
classified as Vulnerable by the IUCN Red List 2000 and have become extinct
in parts of their former range. Wombats are threatened by habitat clearance
and competition with rabbits. |
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