Koala (Phascolarctos cinereus)

Family Phascolarctidae

Koalas are arboreal folivores related to wombats.  They are found in coastal areas of southern and eastern mainland Australia as far north as the base of Cape York.  Their diet is mostly eucalyptus leaves, which contain high concentrations of indigestible lignin, as well as toxic terpenes and phenols. Perhaps because of this poor-quality diet, koalas are usually inactive 20 hours of each day.