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)

E

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Einasleigh Uplands	EIU	11,625,726 hectares (28,727,790 acres)	Qld
Georgetown - Croydon	EIU01	1,041,407 hectares (2,573,370 acres)
Kidston	EIU02	2,929,528 hectares (7,239,020 acres)
Hodgkinson Basin	EIU03	1,607,221 hectares (3,971,530 acres)
Broken River	EIU04	3,309,590 hectares (8,178,200 acres)
Undara - Toomba Basalts	EIU05	2,076,208 hectares (5,130,420 acres)
Herberton - Wairuna	EIU06	661,771 hectares (1,635,270 acres)
Esperance Plains	ESP	2,921,327 hectares (7,218,760 acres)	WA
Fitzgerald	ESP01	1,577,938 hectares (3,899,170 acres)
Recherche	ESP02	1,343,390 hectares (3,319,600 acres)
Eyre Yorke Block	EYB	6,120,409 hectares (15,123,860 acres)	SA
Southern Yorke	EYB01	438,470 hectares (1,083,500 acres)
St Vincent	EYB02	1,093,789 hectares (2,702,810 acres)
Eyre Hills	EYB03	1,172,576 hectares (2,897,500 acres)
Talia	EYB04	1,096,175 hectares (2,708,710 acres)
Eyre Mallee	EYB05	2,319,398 hectares (5,731,360 acres)

F

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Finke	FIN	7,267,416 hectares (17,958,180 acres)	NT / SA
Henbury	FIN01	2,257,063 hectares (5,577,320 acres)
Finke River	FIN02	1,601,516 hectares (3,957,430 acres)
Tieyon	FIN03	2,505,610 hectares (6,191,500 acres)
Pedirka	FIN04	903,228 hectares (2,231,920 acres)
Flinders Lofty Block	FLB	6,615,765 hectares (16,347,910 acres)	SA / NSW
Mount Lofty Ranges	FLB01	300,580 hectares (742,700 acres)
Broughton	FLB02	1,032,918 hectares (2,552,400 acres)
Olary Spur	FLB02	1,745,479 hectares (4,313,170 acres)
Southern Flinders	FLB04	728,317 hectares (1,799,710 acres)
Northern Flinders	FLB05	1,846,804 hectares (4,563,550 acres)
Central Flinders	FLB06	961,667 hectares (2,376,330 acres)
Furneaux	FUR	537,543 hectares (1,328,300 acres)	Tas / Vic
Wilsons Promontory	FUR01	41,144 hectares (101,670 acres)
Flinders	FUR02	496,398 hectares (1,226,630 acres)

G

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Gascoyne	GAS	18,075,257 hectares (44,664,930 acres)	WA
Ashburton	GAS01	3,687,030 hectares (9,110,800 acres)
Carnegie	GAS02	4,718,656 hectares (11,660,050 acres)
Augustus	GAS03	9,669,571 hectares (23,894,030 acres)
Gawler	GAW	12,002,883 hectares (29,659,770 acres)	SA
Myall Plains	GAW01	1,088,767 hectares (2,690,400 acres)
Gawler Volcanics	GAW02	1,556,182 hectares (3,845,410 acres)
Gawler Lakes	GAW03	2,049,193 hectares (5,063,670 acres)
Arcoona Plateau	GAW04	1,089,865 hectares (2,693,120 acres)
Kingoonya	GAW05	1,922,414 hectares (4,750,390 acres)
Torrens	GAW06	1,439,093 hectares (3,556,080 acres)
Roxby	GAW07	1,409,305 hectares (3,482,470 acres)
Commonwealth Hill	GAW08	1,448,062 hectares (3,578,240 acres)
Geraldton Sandplains	GES	3,142,149 hectares (7,764,420 acres)	WA
Geraldton Hills	GES01	1,969,997 hectares (4,867,970 acres)
Leseur Sandplain	GES02	1,172,152 hectares (2,896,450 acres)
Gibson Desert	GID	15,628,918 hectares (38,619,900 acres)	WA
Lateritic Plain	GID01	12,714,805 hectares (31,418,970 acres)
Dune Field	GID02	2,914,114 hectares (7,200,930 acres)
Great Sandy Desert	GSD	39,486,135 hectares (97,572,360 acres)	NT / WA
McLarty	GSD01	12,316,754 hectares (30,435,360 acres)
Mackay	GSD02	25,698,395 hectares (63,502,120 acres)
Ehrenberg	GSD03	375,668 hectares (928,300 acres)
Amedeus	GSD04	722,845 hectares (1,786,190 acres)
Lake Bennett	GSD05	289,541 hectares (715,470 acres)
Lake Lewis	GSD06	82,932 hectares (204,930 acres)
Great Victoria Desert	GVD	42,246,564 hectares (104,393,530 acres)	SA / WA
Shield	GVD01	4,741,854 hectares (11,717,380 acres)
Central	GVD02	12,590,867 hectares (31,112,710 acres)
Maralinga	GVD03	11,460,762 hectares (28,320,160 acres)
Kintore	GVD04	4,961,542 hectares (12,260,240 acres)
Tallaringa	GVD05	3,663,149 hectares (9,051,840 acres)
Yellabinna	GVD06	4,828,389 hectares (11,931,210 acres)
Gulf Coastal	GUC	2,711,718 hectares (6,700,800 acres)	NT
Limmen	GUC01	12,714,805 hectares (31,418,970 acres)
Pellews	GUC02	2,914,114 hectares (7,200,930 acres)
Gulf Fall and Uplands	GFU	11,847,909 hectares (29,276,820 acres)	NT / Qld
McArthur	GFU01	9,330,938 hectares (23,057,250 acres)
Nicholson	GFU02	2,516,971 hectares (6,219,570 acres)
Gulf Plains	GUP	22,041,825 hectares (54,466,540 acres)	NT / Qld
Karumba Plains	GUP01	1,057,366 hectares (2,612,810 acres)
Armraynald Plains	GUP02	1,589,437 hectares (3,927,580 acres)
Woondoola Plains	GUP03	2,375,110 hectares (5,869,000 acres)
Mitchell-Gilbert Fans	GUP04	5,262,816 hectares (13,004,700 acres)
Claraville Plains	GUP05	3,738,013 hectares (9,236,830 acres)
Holroyd Plain-Red Plateau	GUP06	2,208,468 hectares (5,457,240 acres)
Doomadgee Plains	GUP07	1,831,823 hectares (4,526,530 acres)
Donors Plateau	GUP08	2,449,964 hectares (6,053,990 acres)
Gilberton Plateau	GUP09	1,403,937 hectares (3,469,200 acres)
Wellesley Islands	GUP10	124,893 hectares (308,620 acres)

H

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Hampton	HAM	1,088,198 hectares (2,689,000 acres)	SA, WA
Hampton	HAM01

I

J

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Jarrah Forest	JAF	4,509,074 hectares (11,142,160 acres)	WA
Northern Jarrah Forest	JAF01	1,898,799 hectares (4,692,030 acres)
Southern Jarrah Forest	JAF02	2,610,275 hectares (6,450,130 acres)

K

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Kanmantoo	KAN	812,415 hectares (2,007,520 acres)	SA
Kangaroo Island	KAN01	441,685 hectares (1,091,430 acres)
Fleurieu	KAN02	370,730 hectares (916,100 acres)
King	KIN	425,567 hectares (1,051,600 acres)	Tas
King	KIN01

L

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Little Sandy Desert	LSD	11,089,857 hectares (27,403,630 acres)	WA
Rudall	LSD01	991,277 hectares (2,449,500 acres)
Trainor	LSD02	10,098,580 hectares (24,954,100 acres)

M

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
MacDonnell Ranges	MAC	3,929,444 hectares (9,709,870 acres)	NT
McDonnell	MAC01	1,483,959 hectares (3,666,940 acres)
Watarrka	MAC02	1,092,782 hectares (2,700,320 acres)
Hartz Range	MAC03	1,352,702 hectares (3,342,600 acres)
Mallee	MAL	7,397,559 hectares (18,279,770 acres)	WA
Eastern Mallee	MAL01	3,415,839 hectares (8,440,720 acres)
Western Mallee	MAL02	3,981,720 hectares (9,839,000 acres)
Mitchell Grass Downs	MGD	33,468,761 hectares (82,703,110 acres)	NT / Qld
Sylvester	MGD01	1,153,283 hectares (2,849,820 acres)
Barkly Tableland	MGD02	9,479,612 hectares (23,424,630 acres)
Georgina Limestone	MGD03	2,292,026 hectares (5,663,720 acres)
Southwestern Downs	MGD04	3,715,454 hectares (9,181,090 acres)
Kynuna Plateau	MGD05	2,293,311 hectares (5,666,890 acres)
Northern Downs	MGD06	435,263 hectares (1,075,560 acres)
Central Downs	MGD07	9,378,817 hectares (23,175,560 acres)
Southern Wooded Downs	MGD08	4,720,995 hectares (11,665,830 acres)
Mount Isa Inlier	MII	6,778,263 hectares (16,749,450 acres)	Qld
Southwestern Plateaus and Floodouts	MII01	1,333,519 hectares (3,295,200 acres)
Thorntonia	MII02	802,892 hectares (1,983,990 acres)
Mount Isa	MII03	4,641,851 hectares (11,470,260 acres)
Mulga Lands	MUL	25,188,333 hectares (62,241,730 acres)	NSW / Qld
West Balonne Plains	MUL01	1,991,194 hectares (4,920,350 acres)
Eastern Mulga Plains	MUL02	1,563,269 hectares (3,862,920 acres)
Nebine Plains, Block Range	MUL03	1,898,731 hectares (4,691,870 acres)
North Eastern Plains	MUL04	660,369 hectares (1,631,810 acres)
Warrego Plains	MUL05	2,492,085 hectares (6,158,080 acres)
Langlo Plains	MUL06	1,290,484 hectares (3,188,860 acres)
Cuttaburra-Paroo	MUL07	1,703,985 hectares (4,210,640 acres)
West Warrego	MUL08	4,790,087 hectares (11,836,560 acres)
Northern Uplands	MUL09	1,147,549 hectares (2,835,660 acres)
West Bulloo	MUL10	2,852,104 hectares (7,047,700 acres)
Urisino Sandplains	MUL11	2,007,350 hectares (4,960,300 acres)
Warrego Sands	MUL12	479,471 hectares (1,184,800 acres)
Kerribree Basin	MUL13	399,576 hectares (987,370 acres)
White Cliffs Plateau	MUL14	1,074,309 hectares (2,654,680 acres)
Paroo Overflow	MUL15	301,217 hectares (744,320 acres)
Paroo-Darling Sands	MUL16	536,556 hectares (1,325,860 acres)
Murchison	MUR	28,120,554 hectares (69,487,400 acres)	WA
Eastern Murchison	MUR01	21,135,040 hectares (52,225,800 acres)
Western Murchison	MUR02	6,985,514 hectares (17,261,580 acres)
Murray Darling Depression	MDD	19,958,349 hectares (49,318,150 acres)	NSW, SA, Vic
South Olary Plain	MDD01	5,439,224 hectares (13,440,620 acres)
Murray Mallee	MDD02	5,037,583 hectares (12,448,140 acres)
Murray Lakes and Coorong	MDD03	249,191 hectares (615,760 acres)
Lowan Mallee	MDD04	2,391,719 hectares (5,910,070 acres)
Wimmera	MDD05	2,145,380 hectares (5,301,300 acres)
Darling Depression	MDD06	3,662,438 hectares (9,050,080 acres)
Braemer	MDD07	1,032,815 hectares (2,552,140 acres)

N

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Nandewar	NAN	2,701,977 hectares (6,676,730 acres)	NSW / Qld
Nandewar Northern Complex	NAN01	962,254 hectares (2,377,780 acres)
Inverell Basalts	NAN02	230,854 hectares (570,450 acres)
Kaputar	NAN03	78,307 hectares (193,500 acres)
Peel	NAN04	1,430,562 hectares (3,535,000 acres)
Naracoorte Coastal Plain	NCP	2,458,215 hectares (6,074,380 acres)	SA / Vic
Bridgewater	NCP01	463,723 hectares (1,145,880 acres)
Glenelg Plain	NCP02	554,775 hectares (1,370,880 acres)
Lucindale	NCP03	731,656 hectares (1,807,960 acres)
Tintinara	NCP04	708,061 hectares (1,749,660 acres)
New England Tablelands	NET	3,002,213 hectares (7,418,630 acres)	NSW
Bundarra Downs	NET01	151,867 hectares (375,270 acres)
Beardy River Hills	NET02	24,625 hectares (60,850 acres)
Walcha Plateau	NET03	473,825 hectares (1,170,850 acres)
Armidale Plateau	NET04	290,577 hectares (718,030 acres)
Wongwibinda Plateau	NET05	106,929 hectares (264,230 acres)
Deepwater Downs	NET06	97,773 hectares (241,600 acres)
Glenn Innes-Guyra Basalts	NET07	277,299 hectares (685,220 acres)
Ebor Basalts	NET08	35,709 hectares (88,240 acres)
Moredun Volcanics	NET09	117,461 hectares (290,250 acres)
Severn River Volcanics	NET10	150,795 hectares (372,620 acres)
Northeast Forest Lands	NET11	206,492 hectares (510,250 acres)
Tenterfield Plateau	NET12	139,242 hectares (344,070 acres)
Yarrowyck-Kentucky Downs	NET13	65,135 hectares (160,950 acres)
Binghi Plateau	NET14	64,555 hectares (159,520 acres)
Stanthorpe Plateau	NET15	267,999 hectares (662,240 acres)
Eastern Nandewars	NET16	319,096 hectares (788,500 acres)
Tingha Plateau	NET17	78,461 hectares (193,880 acres)
Nightcap	NET18	113,767 hectares (281,120 acres)
Round Mountain	NET19	20,606 hectares (50,920 acres)
Northern Kimberley	NOK	8,420,100 hectares (20,807,000 acres)	WA
Mitchell	NOK01	5,970,915 hectares (14,754,450 acres)
Berkeley	NOK02	2,449,185 hectares (6,052,070 acres)
NSW North Coast	NNC	3,996,591 hectares (9,875,790 acres)	NSW
Washpool	NNC01	59,377 hectares (146,720 acres)
Cataract	NNC02	121,338 hectares (299,830 acres)
Dalmorton	NNC03	316,458 hectares (781,980 acres)
Chaelundi	NNC04	188,279 hectares (465,250 acres)
Yuraygir	NNC05	45,815 hectares (113,210 acres)
Coffs Coast and Escarpment	NNC06	308,115 hectares (761,370 acres)
Macleay Hastings	NNC07	729,170 hectares (1,801,800 acres)
Carrai Plateau	NNC08	20,100 hectares (50,000 acres)
Macleay Gorges	NNC09	153,349 hectares (378,930 acres)
Upper Manning	NNC10	83,181 hectares (205,540 acres)
Comboyne Plateau	NNC11	123,315 hectares (304,720 acres)
Mummel Escarpment	NNC12	400,916 hectares (990,690 acres)
Barrington	NNC13	110,903 hectares (274,050 acres)
Tomalla	NNC14	227,615 hectares (562,450 acres)
Ellerston	NNC15	113,183 hectares (279,680 acres)
Upper Hunter	NNC16	232,750 hectares (575,100 acres)
Karuah Manning	NNC17	602,423 hectares (1,488,620 acres)
Rocky River Gorge	NNC18	86,829 hectares (214,560 acres)
Guy Fawkes	NNC19	73,477 hectares (181,570 acres)
NSW South Western Slopes	NSS	8,681,126 hectares (21,451,530 acres)	NSW / Vic
Inland Slopes	NSS01	4,640,857 hectares (11,467,810 acres)
Lower Slopes	NSS02	3,938,809 hectares (9,733,010 acres)
Capertee Valley	NSS03	101,460 hectares (250,700 acres)
Nullarbor	NUL	19,722,774 hectares (48,736,040 acres)	SA / WA
Carlisle	NUL01	5,788,547 hectares (14,303,810 acres)
Nullarbor Plain	NUL02	12,785,260 hectares (31,593,100 acres)
Yalata	NUL03	1,148,966 hectares (2,839,160 acres)

O

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Ord Victoria Plain	OVP	12,540,703 hectares (30,988,750 acres)	NT / WA
Purnululu	OVP01	3,233,873 hectares (7,991,070 acres)
South Kimberley Interzone	OVP02	7,728,296 hectares (19,097,040 acres)
Gregory	OVP03	74,982 hectares (185,280 acres)
Camfield	OVP04	828,712 hectares (2,047,790 acres)

P

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Pacific Subtropical Islands	PSI	5,817 hectares (14,370 acres)
Lord Howe Island	PSI01	1,909 hectares (4,720 acres)
Norfolk Island	PSI02	3,908 hectares (9,660 acres)
Pine Creek	PCK	2,851,777 hectares (7,046,890 acres)	NT
Pine Creek	PCK01
Pilbara	PIL	17,823,126 hectares (44,041,900 acres)	WA
Chichester	PIL01	8,374,728 hectares (20,694,400 acres)
Fortescue	PIL02	1,951,435 hectares (4,822,100 acres)
Hamersley	PIL03	5,634,727 hectares (13,923,710 acres)
Roebourne	PIL04	1,862,236 hectares (4,601,690 acres)

R

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Riverina	RIV	9,704,469 hectares (23,980,270 acres)	NSW, SA, Vic
Lachlan	RIV01	2,377,523 hectares (5,874,990 acres)
Murrumbidgee	RIV02	2,946,813 hectares (7,281,730 acres)
Murray Fans	RIV03	1,952,238 hectares (4,824,090 acres)
Victorian Riverina	RIV04	1,890,627 hectares (4,671,840 acres)
Robinvale Plains	RIV05	162,003 hectares (400,320 acres)
Murray Scroll Belt	RIV06	375,266 hectares (927,300 acres)

S

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Simpson Strzelecki Dunefields	SSD	27,984,283 hectares (69,150,670 acres)	NSW, NT, Qld, SA
Andado	SSD01	1,355,195 hectares (3,348,760 acres)
Simpson Desert	SSD02	12,962,073 hectares (32,029,980 acres)
Dieri	SSD03	5,152,029 hectares (12,730,940 acres)
Warriner	SSD04	1,032,165 hectares (2,550,540 acres)
Strzelecki Desert	SSD05	7,482,821 hectares (18,490,450 acres)
South East Coastal Plain	SCP	1,749,237 hectares (4,322,460 acres)	Vic
Gippsland Plain	SCP01	1,246,995 hectares (3,081,390 acres)
Otway Plain	SCP02	237,799 hectares (587,610 acres)
Warrnambool Plain	SCP03	264,443 hectares (653,450 acres)
South East Corner	SEC	2,532,053 hectares (6,256,840 acres)	NSW / Vic
East Gippsland Lowlands	SEC01	623,515 hectares (1,540,740 acres)
South East Coastal Ranges	SEC02	1,734,517 hectares (4,286,080 acres)
Bateman	SEC03	174,020 hectares (430,000 acres)
South Eastern Highlands	SEH	8,375,961 hectares (20,697,450 acres)	ACT, NSW, Vic
Highlands-Southern Fall	SEH01	1,196,334 hectares (2,956,210 acres)
Highlands-Northern Fall	SEH02	1,415,806 hectares (3,498,530 acres)
Otway Ranges	SEH03	149,857 hectares (370,300 acres)
Strzelecki Ranges	SEH04	342,045 hectares (845,210 acres)
Murrumbateman	SEH06	630,454 hectares (1,557,890 acres)
Bungonia	SEH07	431,185 hectares (1,065,480 acres)
Kanangra	SEH08	131,310 hectares (324,500 acres)
Crookwell	SEH09	466,523 hectares (1,152,800 acres)
Oberon	SEH10	293,164 hectares (724,420 acres)
Bathurst	SEH11	161,486 hectares (399,040 acres)
Orange	SEH12	284,172 hectares (702,200 acres)
Hill End	SEH13	504,377 hectares (1,246,340 acres)
Bondo	SEH14	541,990 hectares (1,339,300 acres)
Kybeyan-Gourock	SEH15	479,221 hectares (1,184,180 acres)
Monaro	SEH16	1,267,543 hectares (3,132,170 acres)
Capertee Uplands	SEH17	80,494 hectares (198,910 acres)
South Eastern Queensland	SEQ	7,804,921 hectares (19,286,380 acres)	NSW / Qld
Burnett-Curtis Hills and Ranges	SEQ01	962,583 hectares (2,378,590 acres)
Moreton Basin	SEQ02	784,969 hectares (1,939,700 acres)
Burringbar-Conondale Ranges	SEQ03	630,616 hectares (1,558,290 acres)
Sunshine Coast-Gold Coast Lowlands	SEQ04	351,123 hectares (867,640 acres)
Brisbane-Barambah Volcanics	SEQ05	806,778 hectares (1,993,590 acres)
South Burnett	SEQ06	563,866 hectares (1,393,340 acres)
Gympie Block	SEQ07	859,020 hectares (2,122,700 acres)
Burnett-Curtis Coastal Lowlands	SEQ08	700,181 hectares (1,730,180 acres)
Great Sandy	SEQ09	356,502 hectares (880,940 acres)
Scenic Rim	SEQ10	614,729 hectares (1,519,030 acres)
Woodenbong	SEQ11	325,603 hectares (804,580 acres)
Clarence Sandstones	SEQ12	327,829 hectares (810,080 acres)
Clarence Lowlands	SEQ13	520,901 hectares (1,287,170 acres)
Southern Volcanic Plain	SVP	2,440,340 hectares (6,030,200 acres)	SA / Vic
Victorian Volcanic Plain	SVP01	2,356,147 hectares (5,822,170 acres)
Mount Gambier	SVP02	84,194 hectares (208,050 acres)
Stony Plains	STP	13,166,372 hectares (32,534,810 acres)	SA
Breakaways	STP01	2,444,385 hectares (6,040,210 acres)
Oodnadatta	STP02	2,593,717 hectares (6,409,210 acres)
Murnpeowie	STP03	2,910,385 hectares (7,191,720 acres)
Peake-Dennison Inlier	STP04	158,623 hectares (391,970 acres)
Macumba	STP05	693,282 hectares (1,713,140 acres)
Witjira	STP06	1,677,111 hectares (4,144,230 acres)
Baltana	STP07	2,688,870 hectares (6,644,300 acres)
Sturt Plateau	STU	9,857,531 hectares (24,358,490 acres)	NT
Renehan	STU01	1,938,959 hectares (4,791,270 acres)
Newcastle	STU02	4,333,836 hectares (10,709,140 acres)
Birdum	STU03	3,584,736 hectares (8,858,080 acres)
Subantarctic Islands	SAI	49,164 hectares (121,490 acres)	NSW / Vic
Heard and McDonald Islands	SAI01	36,764 hectares (90,850 acres)
Macquarie Island	SAI02	12,400 hectares (31,000 acres)
Swan Coastal Plain	SWA	1,525,798 hectares (3,770,330 acres)	WA
Dandarragan Plateau	SWA01	383,465 hectares (947,560 acres)
Perth	SWA02	1,142,334 hectares (2,822,770 acres)
Sydney Basin	SYB	3,629,597 hectares (8,968,930 acres)	NSW
Kerrabee	SYB01	437,384 hectares (1,080,800 acres)
Hunter	SYB02	461,515 hectares (1,140,430 acres)
Wollemi	SYB04	687,622 hectares (1,699,150 acres)
Yengo	SYB05	461,327 hectares (1,139,960 acres)
Wyong	SYB06	211,494 hectares (522,610 acres)
Pittwater	SYB07	148,389 hectares (366,680 acres)
Cumberland	SYB08	275,693 hectares (681,250 acres)
Burragorang	SYB09	257,572 hectares (636,470 acres)
Sydney Cataract	SYB10	153,839 hectares (380,140 acres)
Moss Vale	SYB11	96,903 hectares (239,450 acres)
Illawarra	SYB12	122,752 hectares (303,330 acres)
Ettrema	SYB13	179,126 hectares (442,630 acres)
Jervis	SYB14	135,981 hectares (336,020 acres)

T

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Tanami	TAN	25,997,277 hectares (64,240,670 acres)	NT / WA
Tanami Desert	TAN01	20,769,151 hectares (51,321,690 acres)
Wycliffe	TAN02	1,600,893 hectares (3,955,890 acres)
Sandover	TAN03	3,627,233 hectares (8,963,090 acres)
Tasmanian Central Highlands	TCH	767,849 hectares (1,897,400 acres)	Tas
Central Highlands	TCH01
Tasmanian Northern Midlands	TNM	415,445 hectares (1,026,590 acres)	Tas
Northern Midlands	TNM01
Tasmanian Northern Slopes	TNS	623,103 hectares (1,539,720 acres)	Tas
Northern Slopes	TNS01
Tasmanian South East	TSE	1,131,822 hectares (2,796,790 acres)	Tas
South East	TSE01
Tasmanian Southern Ranges	TSR	757,228 hectares (1,871,150 acres)	Tas
Southern Ranges	TSR01
Tasmanian West	TWE	1,565,077 hectares (3,867,390 acres)	Tas
West	TWE01
Tiwi Cobourg	TIW	1,010,580 hectares (2,497,200 acres)	NT
Tiwi	TIW01	748,927 hectares (1,850,640 acres)
Coburg	TIW02	261,652 hectares (646,560 acres)

V

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Victoria Bonaparte	VIB	7,301,242 hectares (18,041,760 acres)	NT / WA
Keep	VIB01	6,441,592 hectares (15,917,520 acres)
Hermit Creek	VIB02	170,646 hectares (421,680 acres)
Angalarri	VIB03	689,004 hectares (1,702,570 acres)
Victorian Midlands	VIM	3,469,789 hectares (8,574,040 acres)	Vic
Goldfields	VIM01	1,326,133 hectares (3,276,950 acres)
Central Victorian Uplands	VIM02	1,217,922 hectares (3,009,550 acres)
Greater Grampians	VIM03	237,416 hectares (586,670 acres)
Dundas Tablelands	VIM04	688,318 hectares (1,700,870 acres)

W

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Warren	WAR	844,771 hectares (2,087,470 acres)	WA
Warren	WAR01
Wet Tropics	WET	1,989,107 hectares (4,915,190 acres)	Qld
Herbert	WET01	220,920 hectares (545,900 acres)
Tully	WET02	162,958 hectares (402,680 acres)
Innisfail	WET03	195,200 hectares (482,000 acres)
Atherton	WET04	177,037 hectares (437,470 acres)
Paluma-Seaview	WET05	233,751 hectares (577,610 acres)
Kirrama-Hinchinbrook	WET06	257,594 hectares (636,530 acres)
Bellenden Ker-Lamb	WET07	271,062 hectares (669,810 acres)
Macalister	WET08	112,652 hectares (278,370 acres)
Daintree-Bloomfield	WET09	357,932 hectares (884,470 acres)

Y

IBRA regions and subregions: IBRA7
IBRA region / subregion	IBRA code	Area	States	Location in Australia
Yalgoo	YAL	5,087,577 hectares (12,571,680 acres)	WA
Edel	YAL01	1,588,634 hectares (3,925,600 acres)
Tallering	YAL02	3,498,943 hectares (8,646,080 acres)