“The Wallum Heathland is an evolutionary battle ground for survival. Those life forms that are triumphant represent a finely filtered biodiversity forged from the challenge of extreme adversity.” Wallum, or wallum country, is an Australian ecosystem of coastal south-east Queensland, extending into north-eastern New South Wales. The name Wallum is derived from the Kabi word for the wallum banksia (Banksia aemula). The environment is found close to the sea, behind the second dune. These areas are poorly drained sandy flats interspersed with low sandy ridges. The flats may be rich in decaying organic matter (hummus) however the soil is generally low in mineral particularly nitrates and phosphates and generally acidic, with regular wildfire events.
The plants of the heath land are consistently stunted with some higher ridges supporting eucalypts and the lower swampy areas supporting tea trees.
Species endemic to wallum include some acid frogs – frogs adapted to living and breeding in acidic waters – such as the wallum froglet (Crinia tinnula), wallum rocket frog (Litoria freycineti), and the wallum sedge frog (Litoria olongburensis). In Queensland, the eastern ground parrot appears to be largely restricted to the wallum.