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The IUCN Red List of Threatened Species™
ISSN 2307-8235 (online)
IUCN 2008: T40553A21966368
Scope: Global
Language: English
Isoodon obesulus, Southern Brown Bandicoot
Assessment by: Burbidge, A.A. & Woinarski, J.
View on www.iucnredlist.org
Citation: Burbidge, A.A. & Woinarski, J. 2016. Isoodon obesulus. The IUCN Red List of Threatened
Species 2016: e.T40553A21966368. http://dx.doi.org/10.2305/IUCN.UK.20163.RLTS.T40553A21966368.en
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THE IUCN RED LIST OF THREATENED SPECIES™
Taxonomy
Kingdom
Phylum
Class
Order
Family
Animalia
Chordata
Mammalia
Peramelemorphia
Peramelidae
Taxon Name: Isoodon obesulus (Shaw, 1797)
Common Name(s):
• English:
• French:
Southern Brown Bandicoot, Nuyts Southern Brown Bandicoot, Quenda
Péramèle Obése À Ventre Sombre
Taxonomic Notes:
The taxonomy of the Isoodon obesulus complex has been unsettled. Westerman et al. (2012) concluded
that the subspecies I. o. peninsulae was more closely related to I. auratus than I. obesulus, and should
be either transferred to that species or raised to a species itself. Following Pope et al. (2001), Zenger et
al. (2005) and Westerman et al. (2012), the formerly recognised subspecies I. o. affinis and I. o. nauticus
are included here in I. o. obesulus, leaving only one other subspecies, I. o. fusciventer from southwestern Australia. We have followed this arrangement. I. o. obesulus (south-eastern Australia) is Near
Threatened; I. o. fusciventer (south-western Australia) is Least Concern.
Assessment Information
Red List Category & Criteria:
Least Concern ver 3.1
Year Published:
2016
Date Assessed:
May 16, 2014
Justification:
The Southern Brown Bandicoot, while having suffered drastic declines in the past, remains relatively
widespread and has recovered in numbers in south-western Australia and parts of south-eastern
Australia following fox control.
Previously Published Red List Assessments
2008 – Least Concern (LC)
http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T40553A10333481.en
1996 – Lower Risk/least concern (LR/lc)
1996 – Lower Risk/least concern (LR/lc)
Geographic Range
Range Description:
The Southern Brown Bandicoot has a fragmented distribution occurring in the south-west of Western
Australia (including Daw Island), small parts of South Australia (including Kangaroo Island and some
islands in the Nuyts Archipelago), southern Victoria, Tasmania (including Bruny, Three Hummock and
© The IUCN Red List of Threatened Species: Isoodon obesulus – published in 2016.
http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
1
West Sister Islands) and southern coastal New South Wales. In South Australia, its range has contracted
substantially due to habitat clearance, but subpopulations remain in the South East (Le Duff and
Stratman 2009), Mt Lofty Ranges (Long 2010) and on Kangaroo Island (Jones et al. 2010).
Country Occurrence:
Native: Australia (New South Wales, South Australia, Tasmania, Victoria, Western Australia)
© The IUCN Red List of Threatened Species: Isoodon obesulus – published in 2016.
http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
2
Population
The Southern Brown Bandicoot is locally abundant in Western Australia where fox control is in place,
and is naturally abundant in Tasmania and on offshore islands. In Victoria it has declined greatly in the
greater Melbourne region but occurs extensively in East Gippsland, Wilsons Promontory, Otway Ranges,
Grampian Range and the south-west coastal plains and has increased in abundance where fox control is
in place. In New South Wales it has also declined greatly but remains common at some localities.
Current Population Trend: Decreasing
Habitat and Ecology (see Appendix for additional information)
The Southern Brown Bandicoot prefers dense vegetation, including wetland fringes and heathland. It
has responded well to fox control, with many populations in public land where fox control occurs now at
greater abundance than previously (Morris et al. 1998). Some subpopulations within fox-proof fences
have reached very high densities. The Southern Brown Bandicoot is omnivorous, eating both plants
and animals. It forages for food mainly by digging in the leaf litter and soil to find insects, fungi, plant
root nodules and bulbs. It also eats fruit, seeds and other plant material found above ground.
Bandicoots prefer to live in areas with thick vegetation and construct nests under plants on the ground.
They do not create their own burrow, but occasionally use the burrows of other species (Paull 2008).
Systems: Terrestrial
Threats (see Appendix for additional information)
The Southern Brown Bandicoot is primarily threatened by introduced predators (mainly foxes and cats),
and by changes to the fire regime. These factors have resulted in a large decline in the species since
European settlement, but the species has also declined due to the clearing of native vegetation and
habitat modification. Maintenance of fox control is essential to prevent a continuing decline.
Conservation Actions (see Appendix for additional information)
The Southern Brown Bandicoot occurs in many protected areas, as well as managed forests and private
land. Conservation objective is to maintain current range and abundance for most subpopulations, and
to improve status of I. o. obesulus in south-eastern Australia. Maintenance of fox control in south west
and south east mainland Australia is required to prevent a continuing decline.
Credits
Assessor(s):
Burbidge, A.A. & Woinarski, J.
Reviewer(s):
Pacifici, M.
Contributor(s):
Comer, S., Copley, P., Maclagan, S., Menkhorst, P., Morris, K., Murray, A. &
Westerman, M.
© The IUCN Red List of Threatened Species: Isoodon obesulus – published in 2016.
http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
3
Bibliography
AnAge. 2012. The animal aging and longevity database. Available at:
http://genomics.senescence.info/species/.
Coates, T. D., and Wright, C. J. 2003. Predation of southern brown bandicoots Isoodon obesulus by the
european red fox Vulpes vulpes in south-east Victoria. Australian Mammalogy 25: 107-110.
DEC (Department of Environment and Conservation). 2012. Quenda Isoodon obesulus (Shaw, 1797).
Available at: http://www.dec.wa.gov.au/content/view/7009/1979/. (Accessed: 26 May 2012).
Dickman, C.R. 1996. Overview of the impacts of feral cats on Australian native fauna. Australian Nature
Conservation Agency, Canberra.
Friend, T., Morris, K., van Weenen, J., Winter, J., and Menkhorst, P. 2008. Isoodon obesulus. In 'The IUCN
Red List of Threatened Species'. Version 2011.2. Available at: www.iucnredlist.org. (Accessed: 12 May
2012).
IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-3. Available at: www.iucnredlist.org.
(Accessed: 07 December 2016).
Jones, S., Mooney, P., Ross, J. and Pisanu, P. 2010. The distribution and ecology of threatened small
mammals on Kangaroo Island. Department for Environment and Heritage, Kingscote.
Le Duff, M. K., and Stratman, B. K. 2009. An assessment of the conservation status of the southern
brown bandicoot (Isoodon obesulus) in the south east of South Australia. Department for Environment
and Heritage, Mount Gambier.
Long, K. 2010. Recovery plan for the southern brown bandicoot in the Mount Lofty Ranges, South
Australia 2010-2015. Department for Environment and Heritage, Adelaide.
Maxwell, S., Burbidge, A.A. and Morris, K. 1996. The 1996 Action Plan for Australian Marsupials and
Monotremes. Australasian Marsupial and Monotreme Specialist Group, IUCN Species Survival
Commission, Gland, Switzerland.
Morris, K., Armstrong, R., Orell, P., and Vance M. 1998. Bouncing back. Western Shield update.
Landscope 14(1): 28-35.
Paull, D. J. 2008. Southern Brown Bandicoot, Isoodon obesulus. In: S. Van Dyck and R. Strahan (eds), The
mammals of Australia. Third Edition, pp. 180-182. Reed New Holland, Sydney, Australia.
Pope, L., Storch, D., Adams, M., Moritz, C. and Gordon, G. 2001. A phylogeny for the genus Isoodon and
a range extension for I. obesulus peninsulae based on mtDNA control region and morphology. Australian
Journal of Zoology 49: 411-434.
Westerman, M., Kear, B.P., Aplin, K., Meredith, R.W., Emerling, C. and Springer, M.S. 2012. Phylogenetic
relationships of living and recently extinct bandicoots based on nuclear and mitochondrial DNA
sequences. Molecular Phylogenetics and Evolution 62: 97-108.
Zenger, K.R., Eldridge, M.D.B. and Johnston, P.G. 2005. Phylogenetics, population structure and genetic
diversity of the endangered southern brown bandicoot (Isoodon obesulus) in south-eastern Australia.
Conservation Genetics 6: 193-204.
Citation
Burbidge, A.A. & Woinarski, J. 2016. Isoodon obesulus. The IUCN Red List of Threatened Species 2016:
© The IUCN Red List of Threatened Species: Isoodon obesulus – published in 2016.
http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
4
e.T40553A21966368. http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
Disclaimer
To make use of this information, please check the Terms of Use.
External Resources
For Images and External Links to Additional Information, please see the Red List website.
© The IUCN Red List of Threatened Species: Isoodon obesulus – published in 2016.
http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
5
Appendix
Habitats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Habitat
Season
Suitability
Major
Importance?
1. Forest -> 1.4. Forest - Temperate
Resident
Suitable
Yes
3. Shrubland -> 3.4. Shrubland - Temperate
Resident
Suitable
Yes
3. Shrubland -> 3.5. Shrubland - Subtropical/Tropical Dry
Resident
Suitable
Yes
3. Shrubland -> 3.8. Shrubland - Mediterranean-type Shrubby Vegetation
Resident
Suitable
Yes
4. Grassland -> 4.4. Grassland - Temperate
Resident
Suitable
Yes
4. Grassland -> 4.5. Grassland - Subtropical/Tropical Dry
Resident
Suitable
No
5. Wetlands (inland) -> 5.4. Wetlands (inland) - Bogs, Marshes, Swamps,
Fens, Peatlands
Resident
Suitable
No
14. Artificial/Terrestrial -> 14.4. Artificial/Terrestrial - Rural Gardens
Resident
Marginal
-
Threats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Threat
Timing
Scope
Severity
Impact Score
2. Agriculture & aquaculture -> 2.1. Annual &
perennial non-timber crops -> 2.1.3. Agro-industry
farming
Ongoing
Minority (50%)
Negligible declines
Low impact: 4
Stresses:
1. Ecosystem stresses -> 1.2. Ecosystem degradation
Ongoing
Minority (50%)
Stresses:
1. Ecosystem stresses -> 1.1. Ecosystem conversion
1. Ecosystem stresses -> 1.2. Ecosystem degradation
Ongoing
-
Stresses:
1. Ecosystem stresses -> 1.2. Ecosystem degradation
Ongoing
Minority (50%)
Stresses:
1. Ecosystem stresses -> 1.1. Ecosystem conversion
1. Ecosystem stresses -> 1.2. Ecosystem degradation
Ongoing
Whole (>90%)
Stresses:
1. Ecosystem stresses -> 1.2. Ecosystem degradation
2. Agriculture & aquaculture -> 2.1. Annual &
perennial non-timber crops -> 2.1.4. Scale
Unknown/Unrecorded
2. Agriculture & aquaculture -> 2.3. Livestock farming
& ranching -> 2.3.3. Agro-industry grazing, ranching
or farming
2. Agriculture & aquaculture -> 2.3. Livestock farming
& ranching -> 2.3.4. Scale Unknown/Unrecorded
7. Natural system modifications -> 7.1. Fire & fire
suppression -> 7.1.1. Increase in fire
frequency/intensity
© The IUCN Red List of Threatened Species: Isoodon obesulus – published in 2016.
http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
Negligible declines
-
Negligible declines
Causing/could
cause fluctuations
Low impact: 4
-
Low impact: 4
Medium
impact: 7
6
8. Invasive and other problematic species, genes &
diseases -> 8.1. Invasive non-native/alien
species/diseases -> 8.1.2. Named species (Felis catus)
8. Invasive and other problematic species, genes &
diseases -> 8.1. Invasive non-native/alien
species/diseases -> 8.1.2. Named species (Vulpes
vulpes)
Ongoing
Whole (>90%)
Unknown
Stresses:
2. Species Stresses -> 2.1. Species mortality
Ongoing
Majority (5090%)
Stresses:
2. Species Stresses -> 2.1. Species mortality
Rapid declines
Unknown
Medium
impact: 7
Conservation Actions in Place
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Conservation Actions in Place
In-Place Research, Monitoring and Planning
Action Recovery plan: No
Systematic monitoring scheme: No
In-Place Land/Water Protection and Management
Conservation sites identified: Yes, over part of range
Occur in at least one PA: Yes
Percentage of population protected by PAs (0-100): 31-40
Area based regional management plan: No
Invasive species control or prevention: Yes
In-Place Species Management
Harvest management plan: No
Successfully reintroduced or introduced beningly: Yes
Subject to ex-situ conservation: No
In-Place Education
Subject to recent education and awareness programmes: No
Included in international legislation: No
Subject to any international management/trade controls: No
Conservation Actions Needed
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Conservation Actions Needed
2. Land/water management -> 2.1. Site/area management
© The IUCN Red List of Threatened Species: Isoodon obesulus – published in 2016.
http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
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Conservation Actions Needed
2. Land/water management -> 2.2. Invasive/problematic species control
2. Land/water management -> 2.3. Habitat & natural process restoration
Research Needed
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Research Needed
1. Research -> 1.1. Taxonomy
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
3. Monitoring -> 3.1. Population trends
Additional Data Fields
Distribution
Estimated area of occupancy (AOO) (km²): 3500
Continuing decline in area of occupancy (AOO): No
Extreme fluctuations in area of occupancy (AOO): No
Estimated extent of occurrence (EOO) (km²): 1186000
Continuing decline in extent of occurrence (EOO): No
Extreme fluctuations in extent of occurrence (EOO): No
Number of Locations: 10-50
Continuing decline in number of locations: No
Extreme fluctuations in the number of locations: No
Population
Number of mature individuals: 10000-100000
Continuing decline of mature individuals: Yes
Extreme fluctuations: No
Population severely fragmented: No
No. of subpopulations: 10-50
Continuing decline in subpopulations: Unknown
Extreme fluctuations in subpopulations: No
All individuals in one subpopulation: No
© The IUCN Red List of Threatened Species: Isoodon obesulus – published in 2016.
http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
8
Habitats and Ecology
Continuing decline in area, extent and/or quality of habitat: No
Generation Length (years): 2
Movement patterns: Not a Migrant
© The IUCN Red List of Threatened Species: Isoodon obesulus – published in 2016.
http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T40553A21966368.en
9
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The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species
Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership.
The IUCN Red List Partners are: Arizona State University; BirdLife International; Botanic Gardens
Conservation International; Conservation International; NatureServe; Royal Botanic Gardens, Kew;
Sapienza University of Rome; Texas A&M University; and Zoological Society of London.
THE IUCN RED LIST OF THREATENED SPECIES™