INDEX
Click to go to the following
HOME
MAMMALS
#1
MAMMALS
#2
TASSIE
DEVILS
BIRDS
of PREY
&
LAND BIRDS
SEA
BIRDS
REPTILES
|
(Click on all images for full pic)
EVOLUTION
The fauna of Tasmania is very ancient
in its origins, and due to this island's geographic isolation is
unique and in many cases rare. Tasmania has been separated for 10,000 yrs
from the Australian mainland since the end of the last Ice Age. This has
meant a quite different evolution from Australia has taken place since
then, in both flora and fauna. The ancient origins are from the super continent
of Gondwanaland - an amalgam of Africa, Australia, Antarctica, India,
South America and Australia during the Late Cambrian period - 570 million
years ago. . Australia is the stronghold of Marsupials (Mammals that carry
their young in pouches after birth) In the case of Tasmania this is exclusively
bar to egg-laying marsupials - Echidna and Platypus.. Several icons
of Australian wildlife are not present namely the Koala Bear, the Dingo
and the Emu. Conversely several Tasmanian icon species are no longer present
either in Australia namely the Tasmanian Devil, the Tasmanian Tiger and
a good number of other species. The factors for this are largely climatic,
but also heavily influenced by man both Aboriginal and European. As Tasmania
emerged from the last ice age it had been heavily glaciated in parts and
other than a few remnant areas of alpine vegetation it was predominantly
arid cold Steppes. Wildlife crossed the landbrige to Australia, but
due to the severely cold and arid climate this restricted the movement
of many species especially the Koala. Except in the cases of the suspected
extinction of the Tasmanian Tiger (last recognized one dying in the 40's)
and the Tasmanian Emu this island has be more fortunate than Australia
where many species have totally disappeared. The Europeans arrival has
had the most massive effect of species extinction and population reduction
THE PRESENT
My own love and knowledge of
Tasmania fauna started as a small child growing up on the sea front surrounded
by native bush teeming with wildlife. An interest in nature, camping and
hiking in latter life further developed this. I ended up working at Tasmania's
largest Wild Life Park for nearly a year - set in a huge natural bush setting.
I developed much first-hand knowledge of these wonderful and often timid
animals. Having since owned a large wilderness block of rainforest in Tasmania's
highlands, I had many of these creatures as neighbors and fellow
citizens of my own domain. I have really learnt to understand their
beauty and place in the environment that I live in. Tasmania has been very
fortunate that it has managed to escape the ravages of the fox, dingo,
and feral cat that have at various stages decimated many species and brought
about their extinction on the Australian continent. This could not be more
the truth than at my own property at Cradle Mtn. Over the 10 years I have
had the place I have tried in vane to plant and grow a few endemic trees,
Invariably these, no matter how well protected have been grazed of by either
roaming wombats (bush bulldozers - some weighting over 150 lbs and solid
ploughing through anything inconveniently put in their path!).
All Tasmanian mammals are nocturnal.....
they only come out at night. On dark a cool days sometimes you will catch
the odd wombat roaming or wallaby grazing - other than bird sounds often
the bush seems quite dead during the day. Strangely this is an adaptation
, many Australian Marsupials have poor defences against heat and thus emerge
in the cool of night. It is in the realm of night that all
becomes alive. Many a night I have sat around the camp fire under the starrs
and heard the blood curdling growl and shriek of the Tasmanian Devil, the
hiss of the wombat, the growl and ticking of a Brushtail Possum or the
thud of a wallaby bounding away or gnoring on the cabin timbers of a marsupial
rat! . Many of these creatures are extremely timid and difficult to see
despite being locally plentiful.
Boobook Owl catching an unwary mouse!
Iti s not till the morning when
one can examine the droppings that you really know which creatures have
been out in the night. Many areas of grass in alpine areas such as mine,
look as if they have been manicured with nail scissors - this is what we
call a "marsupial lawn". My parents whom live some 12 miles out of
the city but next to a large eucalypt forest are completely overrun with
wildlife in the garden.
Between the flocks of brightly coloured
parrots and lorikeets, the bandicoots, wallabies and possums it is a struggle
to grow anything that is not stripped bare especially at fruiting and flowering
times. Possums think that Mum's roses are the most tasty things around!
Many of the grazing marsupials - kangaroos, possums and wallabies in some
areas have done extremely well from whiteman. We have provided them with
a great deal more food! Others not so well with predation from domestic
pets and white man himself! Due to the isolation and different evolution
of much of Tasmania's wildlife it is however highly susceptible to the
introduction of disease and competition from introduced species. This has
happened at times and wild fluctuations in populations have been noted.
The famous Tasmania Devil now has a population estimated in the range
of 400,000 to 1 1/2 million though this has been low as 100,000 due to
disease.
THE FUTURE
Luckily in recent years with a strong
and active conservation movement amongst the general public and also amongst
the government funded Parks and Wildlife the future looks bright for Tasmania's
unique flora. The older attitudes are slowly dying a none-to-soon death
of disrespect for our native wildlife. For so long they have been considered
vermin to be exterminated at any cost. This was particularly the case with
our sealife. During the 1800's Tasmania, especially Hobart was one of the
biggest whaling and sealing towns of the world. Both whales and the fur
seal where hunted to near extinction in Tasmanian waters. In the early
1800's it was reported that it was dangerous to cross the Derwent River
at Hobart due to the number of whales. These wonderful numbers have been
very slow to return. Even still outside Australian territorial waters these
majestic sea creatures are still at risk of Japanese whalers doing "research'!
The Tasmanian Tiger is believe by some to still lurk in the wildest corners
of the state. Out populations of Raptors - Birds of Prey are constantly
at risk due to their small numbers. They are highly vulnerable to fluctuations
in food supply and the barrel of mans gun - widely unloved still be farmers.
Being at the end of the food chain also they are susceptible to long-term
poising by pollution of poison,and pesticides (used in forestry areas
to cull Wallaby/possum numbers and other pollution.) With nearly 20% of
the state now in National Parks and many species protected largely the
future looks brighter for our wildlife than in most parts of the world.
I hope that you enjoy the following pages on Tasmanian Wildlife ........
Click the Eastern Quoll to
E-mail ME!
Tazydevilbear
Updated AUG 2004
|