A sleeping koala, Phascolarctos cinereus, in a eucalyptus tree, Healseville, Australia. This cute marsupial sleeps for 20 hours a day and is endangered in the wild. Photograph
Koala hand gripping a tree branch. Koalas, Phascolarctos cinereus, have two opposing thumbs to increase grip, as well as long sharp claws. Species endemic to Australia. Photograph