Tree use by koalas in a chemically complex landscape

Tree use by koalas in a chemically complex landscape

The oils in the leaves of the eucalyptus tree are poisonous to many mammals, presumably as a defence against herbivores. Yet the koala feeds on eucalyptus and little else. The highly specialized nature of the koala's chosen niche — and its vulnerability to environmental change — are made clear by a 10-year study of koalas in the protected colony on Phillip Island. Tree size is the main influence on whether koalas visit a tree to eat the leaves, …

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