That is where their food source is, and due to eucalyptus having so few nutrients they need have it readily available. Also as people encroach more and more pet dogs as well as feral ones tend to tear them up pretty bad. read more
Koalas live in trees because all their needs are met in trees. They rely on certain species of eucalyptus trees for their food, and under normal conditions, they require no further water other than the moisture they obtain from the leaves. read more