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1. Koalas have minimal energy needs because they have evolved the smallest relative brain size of any mammal. The Koala’s brain is so small that it doesn’t even fill its skull cavity.
2. The tough leathery eucalypt leaves that Koalas eat appreared in Australia about 30 million years ago. Although Koalas often denude entire tree areas some of the eucalypts can protect themselves against this. The Manna gum (Eucalyptus viminalsi) is one of the Koala’s favourite food and its youngest and smallest leaves are full of prussic acid which deters the Koalas from eating these and stripping the tree.
3. It’s widely believed that Koalas eat nothing but eucalypt leaves. However they do also occassionally eat soil for the trace minerals it holds. Unfortunately soil can cause them the serious fungal disease that so many of them are suffering from now.
4. In most areas of Australia Koalas are difficult to spot as they sit high up snuggled against eucalypt branches. Indiginous people would often spot Koalas by looking for their shadows against thin eucalyptus leaves which turn the narrow edge to the sun so that less moisture is lost. But come to
Otway Coast and you won't have any trouble seeing Koalas in all our townships -
Wye River, Separation Creek, Kennett River and Grey River. Have fun.