It is a mammal * It has grey fur * It has a pouch for its young * It lives in gum trees * It eats gum leaves * Their environment is specifically Australia and New Guinea. Other places have extremes of weather which Koalas would be unlikely to survive, and their diet is only the Eucalyptus leaf. * They are unlikely to adapt to any other environment. * Most Koalas in Southern Australia have chlamydia, and are dying out.