David Gallan / Koala (Phascolarctos cinereus) grooming itself in a tree, East Gippsland, Australia, December.

Juergen & Christine Sohns / Koala (Phascolarctos cinereus), Parndana, Kangaroo Island, South Australia, Australia

Suzi Eszterhas / Koala (Phascolarctos cinereus) mother mother cuddling her seven-month-old joey, Queensland, Australia

Suzi Eszterhas / Koala (Phascolarctos cinereus) mother cuddling her seven-month-old joey, Queensland, Australia

Roland Seitre / Koala (Phascolarctos cinereus) in tree, Port Lincoln, South Australia, Australia

Inaki Relanzon / Koala (Phascolarctos cinereus) with young in tree, Great Otway National Park, Victoria State, Australia.

Inaki Relanzon / Koala (Phascolarctos cinereus) curled up sleeping in tree, Great Otway National Park, Victoria State, Australia.

ZSSD / Queensland Koala (Phascolarctos cinereus adustus) eating eucalyptus leaves, native to Australia

ZSSD / Queensland Koala (Phascolarctos cinereus adustus) in eucalyptus tree, native to Queensland

Gerry Ellis / Koala (Phascolarctos cinereus) mother and joey, three month old, Australia

Gerry Ellis / Koala (Phascolarctos cinereus) mother with joey, eastern temperate Australia

Gerry Ellis / Koala (Phascolarctos cinereus) male in tree, Australia