The State of Australia?s Birds series presents an overview of the status of Australia?s birds, the major threats they face and the conservation actions needed. This fourth annual report focuses on invasive species.
Australia has hundreds of invasive plants and animals, both native and introduced. Some have been brought purposely, others hitchhiked. The majority simply took the many opportunities offered by human alteration of the landscape. Invasive species are considered to be the greatest threat to biodiversity after habitat loss; they also exact a massive toll on agricultural production. Some of the most abundant invaders compete with or prey upon native birds, or alter their habitat. Introduced predators, plants and competitors are conservatively estimated to contribute to the threatened status of some 95, 12 and 16 bird taxa (species and subspecies), respectively. Yet, invasive plants and animals may provide food and habitat for native birds in already degraded natural systems, and some native birds themselves become invasive.
|Author||Penny Olsen, Andrew Silcocks & Michael Weston|
|Secondary title||Supplement to Wingspan|
|Region||Australia - national|