The Interim Biogeographic Regionalisation for Australia (IBRA) is a biogeographic regionalisation of Australia developed by the Australian government's Department of Sustainability, Environment, Water, Population, and Communities. It was developed for use as a planning tool, for example for the establishment of a national reserve system. The first version of IBRA was developed in 1993–94 and published in 1995.
Geraldton Sandplains is an interim Australian bioregion of Western Australia. It has an area of 3,142,149 hectares. The Geraldton Sandplains is part of the larger Southwest Australia savanna ecoregion, as assessed by the World Wildlife Fund.
The Northern Kimberley, an interim Australian bioregion, is located in the northern Kimberley region of Western Australia, comprising 8,420,100 hectares.
The Victoria Bonaparte, an interim Australian bioregion, is located in the Northern Territory and Western Australia, comprising 7,301,242 hectares.
Yalgoo is an interim Australian bioregion located in Western Australia. It has an area of 5,087,577 hectares. The bioregion, together with the Avon Wheatbelt and Geraldton Sandplains bioregions, is part of the larger Southwest Australia savanna ecoregion as classified by the World Wildlife Fund.
New England Tablelands, an interim Australian bioregion, is located mainly in New South Wales, comprising 3,002,213 hectares, of which 2,860,758 hectares or 95.23 per cent of the bioregion lies within New South Wales; and the residual within Queensland. This bioregion is one of the smaller bioregions in NSW, occupying 3.57 per cent of the state.
New South Wales North Coast or NSW North Coast, an interim Australian bioregion, is located in New South Wales, comprising 3,996,591 hectares.
The Tasmanian South East is an interim Australian bioregion located in the south-eastern region of Tasmania, comprising 1,131,822 hectares.
The Pine Creek biogeographic region, an interim Australian bioregion, is located in the Northern Territory, and comprises 2,851,777 hectares.
The Gulf Fall and Uplands, an interim Australian bioregion, is located in the Northern Territory and Queensland, comprising 11,847,909 hectares.
The Gulf Plains, an interim Australian bioregion (IBRA), is located in the Northern Territory and Queensland, comprising 22,041,825 hectares. It is one of 89 such bioregions defined in Australia, with 419 subregions as of IBRA version 7, compared with the 85 bioregions and 403 subregions described in IBRA6.1.
Burt Plain, an interim Australian bioregion, is located in the Northern Territory, and comprises 7,379,719 hectares.
The Simpson Strzelecki Dunefields, an interim Australian bioregion, comprises 27,984,283 hectares, and is part of four state/territories of Australia: the Northern Territory, South Australia, New South Wales and Queensland
Mount Isa Inlier, an interim Australian bioregion, is located in the Queensland, and comprises 6,778,263 hectares.
The Pacific Subtropical Islands is an interim Australian bioregion which includes Norfolk Island and Lord Howe Island. Its IBRA code is PSI.
Central Mackay Coast, an interim Australian bioregion, is located in Queensland, and comprises 1,464,208 hectares.
Cobar Peneplain, an interim Australian bioregion, is located in New South Wales, and comprises 7,385,346 hectares.
Finke, an interim Australian bioregion, comprises 7,267,416 hectares, and is part of two state/territories of Australia: the Northern Territory and South Australia. It is part of the Central Ranges xeric scrub ecoregion.
Stony Plains, an interim Australian bioregion, comprises 13,166,372 hectares, and is part of two state/territories of Australia: the Northern Territory and South Australia.
Tanami is an interim Australian bioregion, comprising 25,997,277 hectares in the Northern Territory and Western Australia. It is part of the Great Sandy-Tanami desert ecoregion.
