S. swani is the only Australian species that has been described.
The five Australian species are very difficult to tell apart, with the call being the easiest way to do so.
Weston's use of Australian native species was an unusual practice for this period.
However, land management with fire is thought to be a threat to Australian species.
Various Australian species have either been deliberately introduced or accidentally released.
The genus contains Australian two species described as new to science in 1996.
There are a number of Australian species that have become invasive when introduced into other countries.
Some Australian species have very restricted ranges and natural habitats.
This is the only Australian species with black fruit.
The common timber name for the Australian species is the rose mahogany.