They grow in the little water channels.
The ants here, as in nearly the whole of Tropical Australia, build nests from four to six feet high--in some other parts I have known them twenty--to escape, I suppose, from the torrents of rain that at times fall in these regions: the height also protects their eggs and stores from the fires the natives continually keep burning.

This burning, perhaps, accounts for the conspicuous absence of insects and reptiles.

One night, however, I certainly saw glowworms.

These I have only seen in one other region in Australia--near Geelong, in Victoria.
A tree called the native poplar (Codonocarpus cotinifolius) is also found growing in the scrubs and water-channels of this part of the country.

The climate of this region appears very peculiar.