自 2018 年，澳洲的樹熊數量下降了 30%。牠們主要受新南威爾士州及維多利亞州於夏季的叢林大火所威脅。 乾旱、熱浪及砍伐樹木作發展亦對牠們造成影響。

The population of koala in Australia has declined 30% since 2018. One of the major threats was the bushfires occurred during the summers in New South Wales and Victoria. Drought, heatwaves and land clearing for developments also put them in danger. 

https://edition.cnn.com/2021/09/21/australia/koalas-reduce-one-third-intl-hnk/index.html