Where are brown koalas found?

There is no species known as the "brown koala". There is only one secies of koala, and that is Phascolarctus cinereus. There is some debate over whether or not there are sub-species, but the koalas which are larger and tend to have longer fur, tinged with brown, are found in southern Australia. Koalas in the north are smaller, and their fur is grey, or ash-coloured.