Mammals
Southern Brown Bandicoot
Isoodon obesulus · also called southern brown bandicoots
Sheltering deep within dense coastal heathland, a southern brown bandicoot waits for nightfall before emerging to forage, a species increasingly squeezed between introduced predators and the steady loss of the thick vegetation it depends on for survival.
Overview
The southern brown bandicoot, Isoodon obesulus, is a stocky, ground-dwelling marsupial native to forest and coastal habitat across parts of southern Australia. Its heavy dependence on dense heathland cover, significant decline from introduced predators and habitat degradation, and status as one of the more conservation-sensitive bandicoot species make it a clear example of how habitat structure, not just habitat area, can determine a species’ survival.
A species that needs cover, not just space
For the southern brown bandicoot, the difference between suitable and unsuitable habitat often comes down to the density of the vegetation at ground level, a requirement that has made even nominally protected land unsuitable wherever dense shrub cover has thinned or been cleared.
Status
Near Threatened, having declined significantly across parts of southern Australia due to predation by introduced foxes and cats and the loss or degradation of dense coastal heathland habitat.
Southern Brown Bandicoot: common questions
Why has the southern brown bandicoot declined?
This species has suffered significant population declines across parts of its range due to predation by introduced foxes and cats, combined with the clearing or degradation of the dense coastal heathland habitat it relies on for shelter, leading to its classification as Near Threatened.
Why is dense heathland so important to the southern brown bandicoot?
This species depends heavily on dense heathland and shrubby understorey vegetation for shelter from predators, meaning even habitat that remains technically intact can become unsuitable if the dense ground-level vegetation structure it needs is lost or degraded.
How is the southern brown bandicoot different from the northern brown bandicoot?
This species is generally smaller and darker than its close relative the northern brown bandicoot, and the two species occupy largely separate, non-overlapping ranges across southern versus northern and eastern Australia respectively.
What does the southern brown bandicoot eat?
This species feeds on insects, larvae, fungi, and roots, dug up from soil and leaf litter across dense understorey vegetation, leaving distinctive small conical digging pits as evidence of its nightly foraging activity.