Tuesday, October 12, 2010

Koala in Australia

I had been to Queensland Australia and you know what's the most amazing thing about it? I had finally seen a real koala! That's really pitiful! 





When we talk of koala, the only country we can possibly think of is of course Australia. And koalas today are found in Queensland, New South Wales, Victoria and South Australia.





One important thing you need to know is that koalas are not bears. The most obvious reason why they are called bears is because they really look like teddy bears but unfortunately they are not. They are actually Marsupials, which means that their young are born immature and will develop further in the safety of a pouch. They are mammals that survive on an only diet of Eucalyptus leaves (or gum leaves).Their digestive system is especially adapted to detoxify the poisonous chemical found in those leaves. The koala gets its name from an ancient Aboriginal word meaning "no drink" because it receives over 90% of its hydration from the Eucalyptus leaves. It almost does not drink water at all, only perhaps when it is ill. 




Koalas spend 78% of their time sleeping. They are nocturnal animals which prefer to move around just after sunset and then spend most of their daytimes asleep in the fork of a tree. They often sleep for up to 18 hours each day. I heard a myth about koalas that the reason they sleep a lot is because they 'get drunk' on gum leaves. Of course this is not true! In fact, koalas spend most of their time sleeping because they require a lot of energy to digest their toxic, fibrous, low-nutrition diet and sleeping is the only best way to conserve energy.


The young koalas are known as joeys. When the joey is born, it is only about 2 centimetres long with its fur and ears as well as its sense of sight still undeveloped. The joey makes its way from birth canal to the pouch completely on its own. It relies on its already well-developed senses of smell and touch, strong forelimbs and claws and an amazing sense of direction. Inside the pouch, it attaches itself to one of the two teats, which swells to fill its mouth. This prevents the joey from being dislodged from its source of food. It will stay in the pouch for six to seven months, drinking its mother's milk, and slowly growing and developing eyes, ears, fur, etc. At about 22 weeks, it starts to open its eyes and peep out of the pouch. Right from then, it makes a transition of its diet from milk to a substance called "pap". Pap is a specialised form of faeces or droppings, which is soft and runny and thought to have come from the mother's caecum (a blind ended pouch at the junction of the small and large intestines). When it starts to venture out of the pouch, the joey rides on its mother's back, although it continues to return to her pouch until it is too big to fit inside.


It is estimated that only about 100,000 koalas are left in Australia today. Most of their habitat has already been lost due to clearing or bushfire. So it is important that we make ourselves aware of this and help to save what  is left so that we can still continue to see this really huggable animal.
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