The dingo was, however, almost certainly brought from Asia by the ancestors of the modern natives; while the Papuan pig is also in all probability a human introduction, very likely of much later date.
The main point of interest connected with the dingo relates to its origin; that is to say, whether it is a member of the indigenous Australian fauna (among which it is the only large placental mammal), or whether it has been introduced into the country by man.
On the whole, then, the most probable explanation of the case is that the dingo is an introduced species closely allied to the Indian pariah dog.
And since remains of man have apparently not yet been detected in these deposits, it has been thought by some naturalists that the dingo must be an indigenous species.
A pig (Sus papuensis), a dingo, several species of mice (of which Chiruromys is a peculiar genus), a few squirrels, and a considerable number of Chiroptera (bats) inhabit the country.