Koalas inhabit the forests of eastern Australia, but there are a few differences between northern and southern subspecies
The Koalas Diet & Digestion. The Koala is the only mammal, other than the Greater Glider and Ringtail Possum, which can survive on a diet of eucalyptus leaves. Eucalyptus leaves are very fibrous and low in nutrition, and to most animals are extremely poisonous.
They range in length from 60-85 cm (2-3 ft.), but northern koalas are on the smaller side, weighing 4-8.5 kg (9-19 lb.), while southern koalas weigh 7-13 kg (15-29 lb.).
For the Koala’s, mating generally occurs between December and March. They don’t see to have the natural instinct for reproducing though at the same level as many other animals. Females and males are ready to mate between 2 and 3 years of age.