Koala (Phascolarctos cinereus) in a eucalyptus tree, Yanchep National Park, West Australia, Australia, Pacific

Koala bear, Phascolarctos cinereus, among eucalypt leaves, Gorge Wildlife Park, South Australia, Australia, Pacific

Koala with joey on its back, marsupial bear, on a tree of eucalyptus in Great Otway National Park along Great Ocean Road, Victoria, Australia, Pacific

Portrait of adult koala bear eating eucalyptus leaves at Phillip Island in Victoria, Australia, Pacific

Aborigines gather under a eucalyptus tree in the dried up Todd River, Alice Springs, Australia

Eucalyptus tree, Queensland, Australia

A koala bear in the Barmah Forest near Echuca, Victoria, Australia, Pacific

Forest destroyed by bush fires near Michelago in December 2009, New South Wales, Australia, Pacific

Forest destroyed by bush fires near Michelago in December 2009, New South Wales, Australia, Pacific

Koala (Phascolarctos Cinereous), Brisbane, Queensland, Australia

Koala, New South Wales, Australia

Rainbow Eucalyptus tree (Eucalyptus deglupt); Hawaii, United States of America

Rainbow Eucalyptus tree (Eucalyptus deglupt); Hawaii, United States of America

Australia, Koala bear (Phascolarctos cinereus)in a small tree at Featherdale Park.

Hawaii, Maui, Hana, Rainbow eucalyptus tree trunk.

Green foliage, eucalyptus and red berries on white background, Christmas decorations.