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IBRA
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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.[1]
Within the broadest scale, Australia is a major part of the Australasia biogeographic realm, as developed by the World Wide Fund for Nature. Based on this system, the world is also split into 14 terrestrial habitats, of which eight are shared by Australia. The Australian land mass is divided into 89 bioregions and 419 subregions. Each region is a land area made up of a group of interacting ecosystems that are repeated in similar form across the landscape.
IBRA is updated periodically based on new data, mapping improvements, and review of the existing scheme. The most recent version is IBRA7, developed during 2012, which replaced IBRA6.1.
IBRA regions and subregions
This is a list of region and subregions under IBRA7. Region codes are given in parentheses, followed by area, where known. Images of regions are from IBRA6.1, pending creation of maps for IBRA7.
A
| IBRA regions and subregions: IBRA7 | ||||
|---|---|---|---|---|
| IBRA region / subregion | IBRA code | Area | States | Location in Australia |
| Arnhem Coast | ARC | 3,335,669 hectares (8,242,620 acres) | NT | 
|
| Murgenella | ARC01 | 113,180 ha (279,700 acres) | ||
| Maningrida | ARC02 | 1,741,376 ha (4,303,030 acres) | ||
| Nhulunbuy | ARC03 | 1,159,659 ha (2,865,580 acres) | ||
| Groote | ARC04 | 268,735 ha (664,060 acres) | ||
| Wessels | ARC05 | 52,720 ha (130,300 acres) | ||
| Arnhem Plateau | ARP | 2,306,023 hectares (5,698,310 acres) | NT | 
|
| Alligator | ARP01 | 1,038,621 ha (2,566,490 acres) | ||
| Mainoru | ARP02 | 1,267,401 ha (3,131,820 acres) | ||
| Australian Alps | AUA | 1,232,981 hectares (3,046,760 acres) | NSW, Vic | 
|
| Snowy Mountains | AUA01 | 713,114 ha (1,762,140 acres) | ||
| Victorian Alps | AUA02 | 519,866 ha (1,284,620 acres) | ||
| Avon Wheatbelt | AVW | 9,517,104 hectares (23,517,280 acres) | WA | 
|
| Merredin | AVW01 | 6,524,175 ha (16,121,590 acres) | ||
| Katanning | AVW02 | 2,992,929 ha (7,395,690 acres) | ||
B
| IBRA regions and subregions: IBRA7 | ||||
|---|---|---|---|---|
| IBRA region / subregion | IBRA code | Area | States | Location in Australia |
| Ben Lomond | BEL | 657,500 hectares (1,625,000 acres) | Tas | 
|
| Ben Lomond (subregion) | BEL01 | |||
| Brigalow Belt North | BBN | 33,790,510 hectares (83,498,200 acres) | Qld | 
|
| Townsville Plains | BBN01 | 763,495 ha (1,886,640 acres) | ||
| Bogie River Hills | BBN02 | 1,054,392 ha (2,605,460 acres) | ||
| Cape River Hills | BBN03 | 747,393 ha (1,846,850 acres) | ||
| Beucazon Hills | BBN04 | 95,821 ha (236,780 acres) | ||
| Wyarra Hills | BBN05 | 397,935 ha (983,320 acres) | ||
| Northern Bowen Basin | BBN06 | 1,316,957 ha (3,254,270 acres) | ||
| Belyando Downs | BBN07 | 1,772,127 ha (4,379,020 acres) | ||
| Upper Belyando Floodout | BBN08 | 466,275 ha (1,152,190 acres) | ||
| Anakie Inlier | BBN09 | 382,284 ha (944,640 acres) | ||
| Basalt Downs | BBN10 | 1,274,731 ha (3,149,930 acres) | ||
| Isaac-Comet Downs | BBN11 | 2,693,397 ha (6,655,530 acres) | ||
| Nebo-Connors Ranges | BBN12 | 449,269 ha (1,110,170 acres) | ||
| South Drummond Basin | BBN13 | 1,009,244 ha (2,493,900 acres) | ||
| Marlborough Plains | BBN14 | 1,250,611 ha (3,090,330 acres) | ||
| Brigalow Belt South | BBS | 27,219,776 hectares (67,261,530 acres) | Qld / NSW | 
|
| Claude River Downs | BBS01 | 1,026,214 ha (2,535,830 acres) | ||
| Woorabinda | BBS02 | 749,785 ha (1,852,760 acres) | ||
| Boomer Range | BBS03 | 220,541 ha (544,970 acres) | ||
| Mount Morgan Ranges | BBS04 | 1,275,970 ha (3,153,000 acres) | ||
| Callide Creek Downs | BBS05 | 30,133 ha (74,460 acres) | ||
| Arcadia | BBS06 | 715,288 ha (1,767,520 acres) | ||
| Dawson River Downs | BBS07 | 982,807 ha (2,428,570 acres) | ||
| Banana-Auburn Ranges | BBS08 | 1,547,555 ha (3,824,090 acres) | ||
| Buckland Basalts | BBS09 | 281,306 ha (695,120 acres) | ||
| Carnarvon Ranges | BBS10 | 2,263,686 ha (5,593,690 acres) | ||
| Taroom Downs | BBS11 | 652,005 ha (1,611,140 acres) | ||
| Southern Downs | BBS12 | 4,264,666 ha (10,538,220 acres) | ||
| Barakula | BBS13 | 1,301,712 ha (3,216,600 acres) | ||
| Dulacca Downs | BBS14 | 162,442 ha (401,400 acres) | ||
| Weribone High | BBS15 | 966,510 ha (2,388,300 acres) | ||
| Tara Downs | BBS16 | 511,339 ha (1,263,550 acres) | ||
| Eastern Darling Downs | BBS17 | 1,697,945 ha (4,195,710 acres) | ||
| Inglewood Sandstones | BBS18 | 1,219,008 ha (3,012,230 acres) | ||
| Moonie-Commoron Floodout | BBS19 | 750,661 ha (1,854,920 acres) | ||
| Moonie-Barwon Interfluve | BBS20 | 765,231 ha (1,890,930 acres) | ||
| Northern Basalts | BBS21 | 624,671 ha (1,543,600 acres) | ||
| Northern Outwash | BBS22 | 700,241 ha (1,730,330 acres) | ||
| Pilliga Outwash | BBS23 | 535,392 ha (1,322,980 acres) | ||
| Pilliga | BBS24 | 1,732,137 ha (4,280,200 acres) | ||
| Liverpool Plains | BBS25 | 941,752 ha (2,327,120 acres) | ||
| Liverpool Range | BBS26 | 521,960 ha (1,289,800 acres) | ||
| Talbragar Valley | BBS27 | 203,894 ha (503,830 acres) | ||
| Narrandool | BBS28 | 303,754 ha (750,590 acres) | ||
| Broken Hill Complex | BHC | 5,635,422 hectares (13,925,430 acres) | SA / NSW | 
|
| Barrier Range | BHC01 | 1,802,996 ha (4,455,300 acres) | ||
| Mootwingee Downs | BHC02 | 630,694 ha (1,558,480 acres) | ||
| Scopes Range | BHC03 | 260,806 ha (644,470 acres) | ||
| Barrier Range Outwash | BHC04 | 1,954,973 ha (4,830,840 acres) | ||
| Bimbowrie | BHC05 | 279,258 ha (690,060 acres) | ||
| Curnamona | BHC06 | 706,696 ha (1,746,280 acres) | ||
| Burt Plain | BRT | 7,379,719 hectares (18,235,680 acres) | NT | 
|
| Yuendumu | BRT01 | 2,931,061 ha (7,242,810 acres) | ||
| Atartinga | BRT02 | 3,531,111 ha (8,725,570 acres) | ||
| Mount Chapple | BRT03 | 390,981 ha (966,140 acres) | ||
| Dulcie | BRT04 | 526,567 ha (1,301,180 acres) | ||
C
| IBRA regions and subregions: IBRA7 | ||||
|---|---|---|---|---|
| IBRA region / subregion | IBRA code | Area | States | Location in Australia |
| Cape York Peninsula | CYP | 12,256,457 hectares (30,286,360 acres) | Qld | 
|
| Coen - Yambo Inlier | CYP01 | 2,312,126 hectares (5,713,390 acres) | ||
| Starke Coastal Lowlands | CYP02 | 512,498 hectares (1,266,410 acres) | ||
| Cape York - Torres Strait | CYP03 | 94,367 hectares (233,190 acres) | ||
| Jardine - Pascoe Sandstones | CYP04 | 1,444,223 hectares (3,568,750 acres) | ||
| Battle Camp Sandstones | CYP05 | 504,409 hectares (1,246,420 acres) | ||
| Laura Lowlands | CYP06 | 1,791,228 hectares (4,426,220 acres) | ||
| Weipa Plateau | CYP07 | 2,848,753 hectares (7,039,420 acres) | ||
| (Northern) Holroyd Plain | CYP08 | 2,464,074 hectares (6,088,860 acres) | ||
| Coastal Plains | CYP09 | 284,780 hectares (703,700 acres) | ||
| Carnarvon | CAR | 8,430,172 hectares (20,831,410 acres) | WA | 
|
| Cape Range | CAR01 | 2,380,498 hectares (5,882,340 acres) | ||
| Wooramel | CAR02 | 6,049,674 hectares (14,949,070 acres) | ||
| Central Arnhem | CEA | 3,462,433 hectares (8,555,860 acres) | NT | 
|
| Wilton | CEA01 | 3,137,973 hectares (7,754,100 acres) | ||
| Parson | CEA02 | 324,460 hectares (801,800 acres) | ||
| Central Kimberley | CEK | 7,675,587 hectares (18,966,790 acres) | WA | 
|
| Pentecost | CEK01 | 4,397,260 hectares (10,865,900 acres) | ||
| Hart | CEK02 | 2,324,667 hectares (5,744,380 acres) | ||
| Mount Eliza (Kimberley) | CEK03 | 953,661 hectares (2,356,550 acres) | ||
| Central Mackay Coast | CMC | 1,464,208 hectares (3,618,140 acres) | Qld | 
|
| Whitsunday | CMC01 | 89,179 hectares (220,370 acres) | ||
| Proserpine - Sarina Lowlands | CMC02 | 466,498 hectares (1,152,740 acres) | ||
| Clarke - Connors Ranges | CMC03 | 631,985 hectares (1,561,670 acres) | ||
| Byfield | CMC04 | 127,697 hectares (315,550 acres) | ||
| Manifold | CMC05 | 67,885 hectares (167,750 acres) | ||
| Debella | CMC06 | 80,964 hectares (200,070 acres) | ||
| Central Ranges | CER | 10,164,044 hectares (25,115,900 acres) | WA, NT, SA | 
|
| Mann-Musgrave Block | CER01 | 9,214,685 hectares (22,769,980 acres) | ||
| Wataru | CER02 | 423,360 hectares (1,046,100 acres) | ||
| Everard Block | CER03 | 525,998 hectares (1,299,770 acres) | ||
| Channel Country | CHC | 30,409,437 hectares (75,143,360 acres) | NT, Qld, NSW, SA | 
|
| Toko Plains | CHC01 | 2,825,712 hectares (6,982,490 acres) | ||
| Sturt Stony Desert | CHC02 | 8,945,360 hectares (22,104,500 acres) | ||
| Goneaway Tablelands | CHC03 | 5,182,219 hectares (12,805,540 acres) | ||
| Diamantina-Eyre | CHC04 | 1,456,544 hectares (3,599,200 acres) | ||
| Cooper-Diamantina Plains | CHC05 | 4,136,121 hectares (10,220,580 acres) | ||
| Coongie | CHC06 | 1,736,594 hectares (4,291,220 acres) | ||
| Lake Pure | CHC07 | 1,204,027 hectares (2,975,220 acres) | ||
| Noccundra Slopes | CHC08 | 1,798,759 hectares (4,444,830 acres) | ||
| Tibooburra Downs | CHC09 | |||
| Core Ranges | CHC10 | 139,224 hectares (344,030 acres) | ||
| Bulloo | CHC11 | 1,077,480 hectares (2,662,500 acres) | ||
| Bulloo Dunefields | CHC12 | 1,326,712 hectares (3,278,380 acres) | ||
| Central Depression | CHC13 | 580,685 hectares (1,434,900 acres) | ||
| Cobar Peneplain | COP | 7,385,346 hectares (18,249,590 acres) | NSW | 
|
| Boorindal Plains | COP1 | 400,236 hectares (989,000 acres) | ||
| Barnato Downs | COP2 | 1,773,542 hectares (4,382,520 acres) | ||
| Canbelego Downs | COP3 | 2,001,425 hectares (4,945,630 acres) | ||
| Nymagee | COP4 | 2,070,061 hectares (5,115,230 acres) | ||
| Lachlan Plains | COP5 | 1,140,082 hectares (2,817,200 acres) | ||
| Coolgardie | COO | 12,912,209 hectares (31,906,760 acres) | WA | 
|
| Mardabilla | COO1 | 1,843,125 hectares (4,554,460 acres) | ||
| Southern Cross | COO2 | 6,010,838 hectares (14,853,100 acres) | ||
| Eastern Goldfields | COO3 | 5,058,246 hectares (12,499,200 acres) | ||
| Coral Sea | COS | 17,167 hectares (42,420 acres) | ||
D
| IBRA regions and subregions: IBRA7 | ||||
|---|---|---|---|---|
| IBRA region / subregion | IBRA code | Area | States | Location in Australia |
| Daly Basin | DAB | 2,092,229 hectares (5,170,010 acres) | NT | 
|
| Daly Basin | DAB01 | |||
| Dampierland | DAL | 8,360,871 hectares (20,660,160 acres) | WA | 
|
| Fitzroy Trough | DAL01 | 3,432,084 hectares (8,480,860 acres) | ||
| Pindanland | DAL02 | 4,928,787 hectares (12,179,300 acres) | ||
| Darling Riverine Plains | DRP | 10,699,769 hectares (26,439,710 acres) | Qld / NSW | 
|
| Culgoa-Bokhara | DRP01 | 1,354,799 hectares (3,347,780 acres) | ||
| Warrambool-Moonie | DRP02 | 1,151,637 hectares (2,845,760 acres) | ||
| Castlereagh-Barwon | DRP03 | 4,500,355 hectares (11,120,620 acres) | ||
| Bogan-Macquarie | DRP04 | 1,999,951 hectares (4,941,990 acres) | ||
| Louth Plains | DRP05 | 276,573 hectares (683,430 acres) | ||
| Wilcannia Plains | DRP06 | 504,562 hectares (1,246,800 acres) | ||
| Menindee | DRP07 | 653,935 hectares (1,615,910 acres) | ||
| Great Darling Anabranch | DRP08 | 147,138 hectares (363,590 acres) | ||
| Pooncarie-Darling | DRP09 | 110,819 hectares (273,840 acres) | ||
| Darwin Coastal | DAC | 2,843,199 hectares (7,025,700 acres) | NT | 
|
| Darwin Coastal | DAC01 | |||
| Davenport Murchison Ranges | DMR | 5,805,108 hectares (14,344,730 acres) | NT | 
|
| Ashburton Range | DMR01 | 1,218,621 hectares (3,011,280 acres) | ||
| Davenport | DMR02 | 1,589,590 hectares (3,928,000 acres) | ||
| Barkly | DMR03 | 2,996,897 hectares (7,405,490 acres) | ||
| Desert Uplands | DEU | 6,941,095 hectares (17,151,820 acres) | Qld | 
|
| Prairie-Torrens Creeks Alluvials | DEU01 | 1,580,384 hectares (3,905,210 acres) | ||
| Alice Tableland | DEU02 | 2,866,760 hectares (7,083,900 acres) | ||
| Cape-Campaspe Plains | DEU03 | 1,007,026 hectares (2,488,420 acres) | ||
| Jericho | DEU04 | 1,486,926 hectares (3,674,270 acres) | ||