When looking through the 980 "Herb" images at Acclaim Images.com this A Koala in a Tree was a favorite.
All of their pictures are hand picked, availiable in a number of formats, and you can even get custom prints and posters.

Description:
A Koala in a Tree
Stock Photo: A very cute Koala Bear (okay, it's really not a bear) in a eucalyptus tree.

Some related terms for more images:
eucalyptus trees,  mammal,  herbivores,  monkey bears,  fred voetsch,  wildlife,  koala,  australia,  koala bears,  australian animals,  australian wildlife,  marsupials,  cute,  koalas,  adorable,  phascolarctos cinereus,  mammals,