Southwest and South Australia — Human History

Although aboriginal people arrived in Australia at least as far back as 40,000 years ago, European settlement of southwestern Australia did not occur until the early 19th century. Agricultural expansion, grazing, and deforestation over the past century have had profound ecological effects and have fragmented the natural landscape. Introduced animal species such as rabbits, foxes, cats and ferrets have had a dramatic influence on the unique native biota of this region.