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2026 GUIDE

Bolam's Mouse

Pseudomys bolami

Bolam's Mouse is a native Australian rodent adapted to arid environments, occasionally becoming a pest in grain storage and rural buildings.

Updated ·Reviewed by the LocalTradeGuide Editorial Team
Professional Treatment Recommended

For effective control and prevention, professional pest management is recommended.

Expert Identification
Control Methods
Prevention Tips

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Adults: 70-90mm body length, with a tail of similar length.
Body Length
Nocturnal
Activity

Bolam's Mouse At-A-Glance

Key facts and characteristics

Adults: 70-90mm body length, with a tail of similar length.
Body Length
Adults: 15-25 grams.
Weight
Nocturnal
Activity

Complete Bolam's Mouse Guide

Professional identification and control information

Bolam's Mouse is a native Australian rodent adapted to arid environments, occasionally becoming a pest in grain storage and rural buildings.

Identification

How to accurately identify Bolam's Mouse

Expert Tips

Check for a long, sparsely furred tail and pale underside; compare size and coloration to other native mice.

Confusion Species

Can be confused with the Delicate Mouse; distinguished by its longer tail and more robust build.

Key Identification Features

Sandy brown fur, pale underside, large eyes, and a long tail are key for professional identification.

Biology & Lifecycle

Understanding Bolam's Mouse biology and development

Anatomy

Has a compact body, large eyes for night vision, and a long tail for balance, typical of small rodents.

Genetics

Genetic studies show low variability across populations, suggesting historical bottlenecks or limited gene flow.

Lifecycle Details

Egg Stage

Not applicable, as Bolam's Mouse gives birth to live young.

Adult Stage

Adults live for approximately 12-18 months in the wild.

Pupal Stage

Not applicable, as Bolam's Mouse is a mammal.

Larval Stage

Not applicable, as Bolam's Mouse is a mammal.

Development Time

Young are weaned at 4-5 weeks and reach sexual maturity by 8-10 weeks.

Reproduction Rate

Females can produce 3-4 litters per year, each with 2-6 young.

Habitat & Distribution

Where Bolam's Mouse lives and thrives

Hiding Spots

  • burrows
  • under debris
  • in grain storage areas

Nesting Behavior

Builds shallow burrows or nests in dense vegetation, often near food sources.

Preferred Habitats

  • arid grasslands
  • open woodlands
  • agricultural areas

Humidity Preference

Prefers low to moderate humidity, typical of semi-arid environments.

Nesting Requirements

Requires loose soil or leaf litter for burrow construction and nearby cover for protection.

Temperature Preference

Tolerates high temperatures but seeks shelter during extreme heat, typical of Australian summers.

Distribution Patterns

Native Range

Native to arid and semi-arid regions of southern and central Australia.

Climate Zones

Found in temperate and arid climate zones across southern Australia.

Urban Vs Rural

More common in rural and agricultural areas than in urban settings.

Introduced Range

Native to Australia, not introduced.

Spread Mechanism

Spreads naturally through juvenile dispersal and occasional movement along watercourses.

Australian States

Found in Western Australia, South Australia, New South Wales, and Victoria.

Establishment Factors

Establishes in areas with suitable soil for burrowing and access to food and water.

Behavior & Diet

Bolam's Mouse behavioral patterns and feeding habits

Social Behavior

Generally solitary or found in small family groups, especially during breeding season.

Activity Pattern

Nocturnal, emerging after dusk to forage and avoid daytime heat.

Foraging Behavior

Scavenges seeds and insects, often caching food in shallow burrows for later use.

Dispersal Behavior

Young disperse from natal sites in late summer to establish new territories.

Territorial Behavior

Males are territorial during breeding season, defending nesting sites from rivals.

Dietary Preferences

Aphid Farming

Not applicable.

Feeding Habits

Primarily granivorous, feeding on seeds and grains, but also consumes insects and vegetation.

Foraging Range

Typically forages within 10-20 meters of its nest site.

Feeding Patterns

Nocturnal feeder, most active during the night to avoid predators and heat.

Primary Food Sources

  • seeds
  • grains
  • insects

Seasonal Diet Changes

Diet shifts to more green vegetation during wetter months when seeds are scarce.

Health Risks

Health concerns associated with Bolam's Mouse

Important Health Information

Always consult healthcare professionals for medical concerns related to pest exposure.

Allergens

None known.

Contamination Risk

Can contaminate stored food and grain with droppings and urine.

Disease Transmission

Not a known vector of human diseases.

Economic Impact

Financial costs and economic effects of Bolam's Mouse

Economic Significance

Bolam’s Mouse (Pseudomys bolami) is a native Australian rodent and is not recognised as an agricultural or household pest.

Available government information places the species in arid and semi-arid southern Australia, including mallee, bluebush and chenopod shrublands rather than built environments or intensive cropping areas. The NSW government lists it as endangered in that state, while its Commonwealth status is recorded as not listed on the NSW profile last updated on 7 September 2017; the current DCCEEW SPRAT register should be checked before making a formal compliance decision. There is no verified evidence that Bolam’s Mouse causes meaningful economic damage to crops, stored food or buildings. NSW Environment, Energy and Science species profile

Agriculture And Property

Any apparent economic impact is more likely to result from misidentifying an introduced House Mouse or rat than from Bolam’s Mouse itself.

Introduced House Mice (Mus musculus) can damage stored food and agricultural production, but those impacts must not be attributed to a native Pseudomys without reliable identification. Protecting mallee and chenopod habitat, avoiding unnecessary disturbance and preventing predation by introduced cats and foxes are more appropriate management priorities than treating Bolam’s Mouse as a pest. Agriculture Victoria House Mouse information

Detection & Signs

Early warning signs of Bolam's Mouse presence

Field Identification

Bolam’s Mouse is a small, nocturnal, burrowing native rodent with large eyes and a long, furred tail.

It is found in arid and semi-arid southern Australia in mallee, bluebush and chenopod shrublands, and has dull amber-brown to olive-brown upperparts, pale underparts, and long hind feet. Field signs such as burrows and tracks are not sufficient for identification; a confirmed identification requires expert examination. Western Australian Department of Biodiversity, Conservation and Attractions mammal guide

Avoiding Misidentification

Bolam’s Mouse is commonly confused with the introduced House Mouse.

Compared with a House Mouse, Bolam’s Mouse has more prominent eyes, longer ears, a slender build, and lacks the House Mouse’s musty odour and notched upper incisors. It also has a different teat arrangement, but distinguishing this requires handling by a trained professional. The sandy inland mouse is another similar species, but Bolam’s Mouse has darker fur, larger ears, longer hind feet, and a more heavily furred tail. NSW species profile

Prevention

Proactive strategies to prevent Bolam's Mouse infestations

Building Exclusion

Bolam’s Mouse is a protected native species, so any exclusion measures must be non-lethal and avoid harm.

Store food and waste in sealed containers, eliminate standing water and food residue, and seal gaps around doors, pipes, vents and wall junctions using fine mesh or door sweeps. Before sealing any opening, ensure no native animal is inside and that dependent young are not trapped. Do not use rodenticides, glue boards, snap traps or live-catch traps where Bolam’s Mouse could be present. If a mouse is inside, contact a wildlife authority for advice. NSW Environment, Energy and Science identification guidance

Habitat Protection

Protecting intact mallee, bluebush and chenopod shrubland is essential for Bolam’s Mouse conservation.

Avoid clearing native vegetation, disturbing burrows, compacting soil, or removing fallen timber. Prevent introduced predators such as cats and foxes from hunting in occupied habitat. Before any works that could affect native fauna, consult the relevant state agency—NSW National Parks and Wildlife Service for south-western NSW, the Department for Environment and Water for South Australia, and the Department of Biodiversity, Conservation and Attractions for Western Australia. NSW National Parks and Wildlife Service recovery plan record

Control Methods

Effective treatment options for Bolam's Mouse control

Who To Contact

Injured or displaced Bolam’s Mice should be reported to a wildlife authority or permitted rehabilitator.

For south-western NSW, contact the NSW National Parks and Wildlife Service or WIRES at 1300 094 737; for South Australia, contact the Department for Environment and Water, a local wildlife rescue group or a veterinarian; for Western Australia, contact the DBCA Wildcare Helpline at (08) 9474 9055. Keep people and pets away, do not feed or handle the animal, and photograph it from a distance. South Australia requires a permit to rescue native wildlife. DBCA Wildcare Helpline South Australian Department for Environment and Water rescue permits

Legal And Ethical Position

Bolam’s Mouse is protected as native wildlife and cannot be controlled as a pest.

Killing, poisoning, trapping, capturing, or relocating a suspected Bolam’s Mouse is illegal without a permit. In New South Wales, it is endangered under the Biodiversity Conservation Act 2016, and activities affecting it may require a biodiversity conservation licence. Its Commonwealth status is not listed as of September 2017, but check the current SPRAT register before any formal action. NSW Government threatened-species licensing guidance

Professional Services

What does Bolam's Mouse control cost?

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Seasonal Patterns

Bolam's Mouse seasonal activity and management timing

Autumn

Activity remains steady in autumn, with increased foraging as temperatures cool.

Frequently Asked Questions

Common questions about Bolam's Mouse

Are Bolam's Mouse dangerous?

Bolam's Mouse is not dangerous to humans but can contaminate food and damage stored grain.

How do I identify Bolam's Mouse?

Look for a small rodent with sandy brown fur, pale underside, and a long tail, often found in rural or semi-arid areas.

How do I control Bolam's Mouse?

Use snap traps, bait stations, and seal entry points to buildings; maintain clean storage areas to reduce attractants.

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