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What tree's leaves make up most of the diet of the koala?

Updated: 8/20/2019
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Eucalyptus Leaves make up the main source of the koala's diet. While there are hundreds of different eucalyptus species in Australia, koalas eat from only about 60 of the species, consuming about half a kilogram of eucalyptus leaves every day. Koalas will not eat all types of eucalyptus, feeding on just 14 species as their primary food source, specifically, the subgenus Symphyomyrphus. Preferred eucalyptus species vary depending on their locality, so that the species eaten by Victoria koalas will be different to those eaten by north Queensland koalas. Koalas have been known to also eat the buds, flowers and bark of these particular species, while dirt also seems to supplement mineral deficiencies. Koalas have been seen feeding in eucalypt trees such as Manna Gum, Swamp Gum, Blue Gum, Forest Red Gum and Grey Gum.

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Q: What tree's leaves make up most of the diet of the koala?
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Neither. Koalas typically inhabit open eucalypt woodlands, and the leaves of these trees make up most of their diet.


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Koalas are specially adapted for their diet of tough, fibrous eucalyptus leaves which are low in nutrition. To begin with, the koala has opposable thumbs on its hands, which it uses to reach out and grab gum leaves and flowers. The koala is able to climb tall, straight, smooth-barked gum trees in order to get the tastiest leaves and flowers, rather than being restricted to older growth lower down. Furthermore, the koala's digestive system is capable of removing the toxins in eucalyptus leaves, filtering them out by the liver. The caecum, which comes off the main intestine, has millions of micro-organisms which break down the fibrous eucalyptus leaves, changing them into digestible nutrients and thus making them easier for the koala to absorb.


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