The koala is an iconic Australian marsupial that feeds almost exclusively on the leaves of eucalyptus trees — one of the most nutritionally poor and toxin-laden diets of any mammal. To survive on this challenging food source, koalas have a highly specialized liver that detoxifies the phenolic compounds in eucalyptus, and they sleep up to 22 hours a day to conserve the limited energy their diet provides. Despite their bear-like appearance, koalas are marsupials whose young — called joeys — develop in a rear-opening pouch for six months before graduating to riding on their mother’s back.
About the Koala
Phascolarctos cinereus
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💡 Fun Facts
01
Koalas sleep up to 22 hours per day to conserve the energy needed to digest the toxic eucalyptus leaves they eat.
02
A koala's liver is proportionally much larger than that of most mammals to cope with the volume of eucalyptus toxins it must detoxify daily.
03
Koala fingerprints are virtually indistinguishable from human fingerprints — even under a microscope by forensic experts.
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Joey koalas eat their mother's specialized pap — a nutritious, semi-liquid form of feces — to acquire the gut bacteria needed to digest eucalyptus.
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Each koala has dietary preferences for specific eucalyptus species, and individuals relocated to unfamiliar trees may refuse to eat.
📍 Where to Find This Animal
Habitat Types:
Eucalyptus Forest
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