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[11]: 96 Each day, koalas eat up to 400 grams (14 oz) of leaves, spread over four to six feeding periods. [2]: 187 Despite their adaptations to a low-energy lifestyle, they have meagre fat reserves. [2]: 189 Their low-energy diet limits their activity and they sleep 20 hours a day.
In zoology, a folivore is a herbivore that specializes in eating leaves. Mature leaves contain a high proportion of hard-to-digest cellulose, less energy than other types of foods, and often toxic compounds. [1] For this reason, folivorous animals tend to have long digestive tracts and slow metabolisms.
Caterpillars, insects, grasshoppers, termites and hummingbirds are all examples of primary consumers because they only eat autotrophs (plants). There are certain primary consumers that are called specialists because they only eat one type of producers. An example is the koala, because it feeds only on eucalyptus leaves.
The close correlation of these oils with other more potent toxins called formylated phloroglucinol compounds (euglobals, macrocarpals and sideroxylonals) [35] allows koalas and other marsupial species to make food choices based on the smell of the leaves. For koalas, these compounds are the most important factor in leaf choice.
Koalas don't have sweat glands, and during times of high heat and low rainfall, the animals simply can't endure the evaporation caused by panting or licking. Well, no wonder koalas love to hang ...
The tail of koalas is almost absent, an unusual characteristic for a tree climbing mammal, although other anatomical features are well suited to that habitat. They have some resemblance to the wombats , a family of large terrestrial marsupials which are allied with koalas as Vombatiformes .
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