An adult koala eats a eucalyptus leaf. Joeys can't break down the toxic, fibrous plants on their own yet. Photograph By David Marks/National Geographic When it’s time to feed the kids, koala moms do ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

Koalas are herbivores (specifically browsing folivores) and feed almost exclusively on the leaves of the eucalyptus plant (gum trees). Sometimes, they will also eat the soft stems, flowers, and ...