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Macropus irma 

Scope: Global
Status_ne_offStatus_dd_offStatus_lc_onStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Diprotodontia Macropodidae

Scientific Name: Macropus irma
Species Authority: (Jourdan, 1837)
Common Name(s):
English Western Brush Wallaby, Kwoora, Western Bush Wallaby
Taxonomic Notes: No subspecies are recognised.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2014-05-16
Assessor(s): Woinarski, J. & Burbidge, A.A.
Reviewer(s): Johnson, C.N. & Hawkins, C.
Contributor(s): Start, T.
Justification:
Listed as Least Concern as, although the range of the Western Brush Wallaby has declined in the past due to land clearance, in much of its remaining extensive habitat its numbers have increased following widespread fox control.
Previously published Red List assessments:

Geographic Range [top]

Range Description:The Western Brush Wallaby is endemic to south-western Australia with a distribution from north of Kalbarri to near Cape Arid.
Countries occurrence:
Native:
Australia (Western Australia)
Additional data:
Estimated area of occupancy (AOO) - km2:1300-4000Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:131000
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:10-20Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:No
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There are no robust measures of abundance; however, the species is relatively common, particularly where fox control is in place. They were once very common, with large numbers of skins having been traded commercially before they were protected in 1951. Abundance was significantly reduced until widespread fox control was implemented in state forests and conservation estate; it seems likely that foxes preyed on juveniles.
Current Population Trend:Stable
Additional data:
Number of mature individuals:10000-50000Continuing decline of mature individuals:No
Extreme fluctuations:NoPopulation severely fragmented:No
No. of subpopulations:10-50Continuing decline in subpopulations:No
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:Western Brush Wallabies inhabit a wide range of habitats, including open forest and woodland, mallee, heathland, low open grasses, and scrubby thickets, but favour open, grassy areas and are absent in Karri Eucalyptus diversicolor forests where there is a dense understorey. They are primarily grazers but little is known of food preferences.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:No
Generation Length (years):5-6
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): There are no current major threats to this species. Clearance for agriculture has fragmented the population and reduced its range. Foxes reduced Western Brush Wallaby numbers, and the species has increased in abundance in areas where foxes have been controlled (overall the species has increased in number over the past 10 years or so due to fox control).

Conservation Actions [top]

Conservation Actions:

There is no specific management for this species. However, large parts of its current range are subjected to prescribed burning, which seems to favour the species, and fox control.

Classifications [top]

1. Forest -> 1.4. Forest - Temperate
suitability:Suitable season:resident major importance:Yes
2. Savanna -> 2.1. Savanna - Dry
suitability:Suitable season:resident major importance:Yes
3. Shrubland -> 3.5. Shrubland - Subtropical/Tropical Dry
suitability:Suitable season:resident major importance:Yes
3. Shrubland -> 3.8. Shrubland - Mediterranean-type Shrubby Vegetation
suitability:Suitable season:resident major importance:No
2. Land/water management -> 2.1. Site/area management
2. Land/water management -> 2.2. Invasive/problematic species control

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:No
  Percentage of population protected by PAs (0-100):41-50
  Area based regional management plan:Yes
  Invasive species control or prevention:Yes
In-Place Species Management
  Harvest management plan:No
  Successfully reintroduced or introduced beningly:No
  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
4. Transportation & service corridors -> 4.1. Roads & railroads
♦ timing:Ongoing ♦ scope:Minority (<50%) ♦ severity:Negligible declines ⇒ Impact score:Low Impact: 4 
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.2. Species disturbance

7. Natural system modifications -> 7.1. Fire & fire suppression -> 7.1.3. Trend Unknown/Unrecorded
♦ timing:Ongoing ♦ scope:Whole (>90%) ♦ severity:Negligible declines ⇒ Impact score:Medium Impact: 6 
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

8. Invasive and other problematic species, genes & diseases -> 8.1. Invasive non-native/alien species/diseases -> 8.1.2. Named species [ Vulpes vulpes ]
♦ timing:Ongoing ♦ scope:Whole (>90%) ♦ severity:Slow, Significant Declines ⇒ Impact score:Medium Impact: 7 
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

3. Monitoring -> 3.1. Population trends

Bibliography [top]

IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-2. Available at: www.iucnredlist.org. (Accessed: 04 September 2016).

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. D. and Christensen, P. 2008. Western Brush Wallaby, Macropus irma. In: S. Van Dyck and R. Strahan (eds), The mammals of Australia. Third Edition, pp. 340-341. Reed New Holland, Sydney, Australia.

Morris, K., Friend, T., and Burbidge, A. 2008. Macropus irma. In 'The IUCN Red List of Threatened Species'. Version 2012.2. Available at: www.iucnredlist.org. (Accessed: 17 February 2013).


Citation: Woinarski, J. & Burbidge, A.A. 2016. Macropus irma. The IUCN Red List of Threatened Species 2016: e.T12626A21953231. . Downloaded on 27 September 2016.
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