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The Guardian - AU
The Guardian - AU
Environment
Donna Lu and Lisa Cox

Australia’s koala paradox: why is the beloved marsupial endangered in parts but overabundant in others?

A koala in a gum tree with no foliage
In parts of Victoria and South Australia, overpopulation of koalas is leading to defoliation and starvation. Photograph: Desley Whissen

On French Island in Victoria’s Western Port Bay, koalas are dropping from trees. Eucalypts have been eaten bare by the marsupials, with local reports of some found starving and dead. Multiple koalas – usually solitary animals – can often be seen on a single gum.

Koalas were first introduced to French Island from the mainland in the 1880s, a move that protected the species from extinction in the decades they were extensively hunted for their pelts. In the absence of predators and diseases such as chlamydia, the population thrived.

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