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Tasman Peninsula Dusky Antechinus (Antechinus vandycki)

The Tasman Peninsula dusky antechinus is a small carnivorous marsupial known from south-eastern Tasmania. It occupies eucalypt forest and sclerophyll rainforest, with most of its limited known habitat in state forest affected by logging. Clearing can remove the small, fragmented stands of intact forest on which the species depends.

Conservation status

Tasmania, Threatened Species Protection Act 1995: Vulnerable.

Breeding season

The annual breeding period lasts about 2 to 3 weeks, but calendar months have not been confirmed. The month bands below therefore show the evidence limit rather than assigning an unsupported breeding date. Clearing can damage habitat in any month because the species is associated with small, fragmented forest stands.

Months are January to December. A calendar-specific breeding window requires local survey evidence or advice from the relevant Tasmanian authority.

  • Highest clearing risk: There is no documented peak month. Habitat loss can occur year-round, and clearing during the unknown breeding or dependent-young period should be treated as a risk.

Identification

This is a relatively large antechinus with brown and grey fur and a tail shorter than the combined head and body length. Species confirmation may require an experienced fauna ecologist because it belongs to a group of closely related dusky antechinus taxa.

Adults have a head and body length of about 13 cm and weigh about 90 g. The tail is shorter than the head and body. Fur is described as a mixture of brown and grey, with some variation on the torso and tail.

Head and body: About 13 cm

Body mass: About 90 g

Tail: Shorter than the head and body

Fur: Brown and grey, with variation on the torso and tail

Identification: Similar species

The Tasman Peninsula dusky antechinus was separated from other members of the Australian Dusky Antechinus complex using geographic, coat colour, craniodental and genetic differences. No field key or measurements reliably separate it from every similar antechinus.

  • Treat antechinus records from the Tasman Peninsula as requiring specialist confirmation where the identification affects clearing or construction decisions.
  • Retain clear photographs, body measurements where authorised, location data and any legally obtained voucher or genetic material required by the relevant authority.

Identification: Sexes and field signs

Reliable sex-specific external differences, tracks, scats, calls, nests and other species-specific field signs are not described. Males have a distinctive annual breeding strategy: after intense mating, they die before females give birth. Females then raise the next generation.

  • Do not rely on an unverified antechinus observation alone for species-level identification.
  • Record the animal's appearance, measurements, habitat, exact location and photographic evidence during fauna handling or salvage work.

Distribution: State and bioregion

The species is known from a restricted area of south-eastern Tasmania. A confirmed national range map, bioregion allocation, total population estimate and population trend are not available.

The confirmed state range is Tasmania. Records are from the Tasman Peninsula, near Port Arthur, in south-eastern Tasmania. The species may also occur on the Forestier Peninsula, but this is not confirmed.

Confirmed state: Tasmania

Confirmed area: Tasman Peninsula, south-eastern Tasmania

Possible additional area: Forestier Peninsula, unconfirmed

  • Tasmania: Tasman Peninsula, with possible but unconfirmed occurrence on the Forestier Peninsula.
  • A formal Interim Biogeographic Regionalisation for Australia bioregion has not been identified.

Distribution: Strongholds and subpopulations

Most of the known limited habitat falls within state forest. The species apparently now occurs in tiny, fragmented stands of intact forest that remain within a broader area affected by logging.

  • Treat remaining intact forest stands on the Tasman Peninsula as potential habitat until survey evidence demonstrates otherwise.
  • Consider habitat connectivity between stands when planning access tracks, service corridors and clearing boundaries.

Distribution: Population information

No population estimate or quantified trend has been published. A 2021 summary reported that only eight specimens were known, but this is a count of known specimens, not an estimate of the wild population.

Known specimens reported in October 2021: Eight specimens

Wild population estimate: Not stated

Population trend: Not quantified

Habitat: Vegetation and structure

The Tasman Peninsula dusky antechinus uses forest habitats in south-eastern Tasmania. The documented habitat types are eucalypt forest and sclerophyll rainforest, with remaining habitat concentrated in fragmented intact stands.

The species has been described from eucalypt forest and sclerophyll rainforest. Preferred eucalypt species, canopy height, understorey density, hollow requirements and elevation limits are not well documented.

  • Map and retain patches of intact eucalypt forest and sclerophyll rainforest within or adjacent to a project area.
  • Inspect forest edges, small remnant stands and connected vegetation rather than limiting assessment to large continuous forest blocks.
  • Treat habitat quality and connectivity as site-specific questions requiring field assessment.

Habitat: Climate and elevation

No elevation range, temperature limit, rainfall threshold or other climate boundary has been published. The known distribution is restricted to south-eastern Tasmania.

Elevation range: Not stated

Climate limits: Not stated

Foraging habitat: Food

This species is a carnivorous marsupial that feeds mainly on invertebrates. Spiders and insects are recorded as food, but its foraging range and detailed feeding microhabitat have not been measured.

The diet consists mainly of invertebrates, including spiders and insects. No plant foods or prey proportions are provided.

Main food: Invertebrates

Examples: Spiders and insects

Known prey proportions: Not stated

  • Record leaf litter, fallen timber, ground debris and dense understorey during habitat assessment because these features may support invertebrate prey, although a species-specific preference has not been documented.

Foraging habitat: Foraging area

A home-range size, nightly movement distance, foraging distance or density estimate has not been established. Foraging habitat should therefore be assessed across the full intact forest patch and its connected edges, not only at the capture point.

  • Avoid assuming that a cleared strip contains no foraging habitat simply because no animal is detected there during a short survey.
  • Document leaf litter, ground cover, fallen timber and other features that may support invertebrates throughout the proposed clearing footprint.

Breeding habitat: Breeding biology

Breeding is concentrated into a short annual mating period. The month, litter size, gestation length, age at maturity and lifespan are not well documented.

Mating lasts about 2 to 3 weeks each year. Males compete intensely and may mate for up to 14 hours at a time. Male mortality occurs after mating and before females give birth. Females then raise the next generation.

Breeding season: Annual period lasting about 2 to 3 weeks; month not stated

Litter size: Not stated

Gestation: Not stated

Age at maturity: Not stated

Lifespan: Not stated

Male breeding outcome: Males die after the breeding period, before females give birth

Breeding habitat: Breeding habitat

A nest type or specific breeding structure has not been identified. Because breeding occurs within the species' forest habitat and females raise the next generation there, intact forest stands should be treated as potential breeding habitat.

  • Avoid clearing intact forest during the breeding period where the timing can be established by local survey or authority advice.
  • Protect connected forest and ground-level cover until fauna assessment has addressed denning, nesting and dependent young.

Sheltering habitat: Potential refuges

No species-specific den, nest, hollow, burrow or refuge dimensions have been published. The species is associated with forest habitat, including small intact stands threatened by logging.

Use of hollows, burrows, logs, rock crevices, nests or other shelter types is not well documented. Refuge dimensions and measured ground-cover requirements are also unavailable.

Den or nest type: Not stated

Refuge size: Not stated

Hollow requirement: Not stated

  • During pre-clearing checks, inspect dense ground cover, fallen timber, litter, logs, stumps, root cavities and other concealed refuges within the clearing footprint.
  • Retain connected intact vegetation and avoid unnecessary removal of fallen timber and ground cover until fauna handling requirements have been confirmed.
  • Use an approved fauna spotter catcher for any captured or displaced animal, as required by the relevant Tasmanian permissions.

Threats: Clearing and fragmentation

The known threats are habitat loss, logging, deforestation and fragmentation. The effects of roads, fire, predators, disease and hydrology change on this species are not quantified.

Most of the species' limited habitat falls within state forest affected by logging. The species apparently persists in tiny, fragmented stands of intact forest, so further clearing can remove habitat and increase isolation between stands.

  • Avoid clearing intact forest stands on the Tasman Peninsula wherever practicable.
  • Minimise the width and length of temporary and permanent disturbance footprints.
  • Maintain links between retained forest patches and prevent isolated remnant stands from being further reduced.
  • Stage clearing so fauna searches and salvage can occur before vegetation removal.

Threats: Other project risks

Species-specific evidence about roads, vehicle strike, altered fire regimes, introduced predators, disease or hydrology change is limited. These risks should still be considered where a project changes forest structure, access or drainage, but their importance cannot be ranked from current knowledge.

  • Assess vehicle access and road edges where they intersect retained forest or connect habitat patches.
  • Keep construction disturbance, lighting, drainage changes and waste away from retained forest unless assessed and approved.
  • Seek species-specific advice before using fire or changing drainage in known or potential habitat.
  • Record and report any antechinus captures, injuries or deaths during clearing and construction.

Threats: Conservation status

The species is listed as Vulnerable in Tasmania and is not listed under the EPBC Act. It has not been evaluated on the IUCN Red List.

Tasmanian listing: Vulnerable

EPBC Act listing: Not listed.

IUCN status: The species has not been evaluated.

Survey methodology: 1. Habitat assessment and targeted searches

Survey planning should reflect the species' very restricted distribution on the Tasman Peninsula and its association with intact eucalypt forest and sclerophyll rainforest. No prescribed survey guideline or minimum effort has been published, so the project ecologist should set effort from the habitat area, proposed disturbance and approval conditions.

Map intact and fragmented forest, eucalypt forest, sclerophyll rainforest and likely movement links before selecting survey sites.

Prioritise intact forest stands and edges adjoining logged areas because the species is reported from tiny, fragmented stands under threat from logging.

Record habitat condition, canopy cover, dense ground cover, logs, rocks, tree hollows and connecting vegetation, but do not assume that every feature is used by this species.

Survey methodology: 2. Spotlighting and active searches

Use nocturnal spotlighting and quiet walking searches as general survey methods for a small forest marsupial, with routes through retained forest and along habitat edges.

Record the date, start and finish times, weather, observers, route length, habitat type and all detections so that survey effort can be assessed.

Search slowly and keep lighting and observer movement consistent between visits, because the species is large for an antechinus but may still be difficult to detect in dense forest.

Published body size: Head and body length 13 cm; body mass 90 g; tail shorter than the head and body.

Survey methodology: 3. Live trapping and remote cameras

Consider small-mammal live trapping and remote cameras where spotlighting does not provide adequate coverage, subject to animal ethics approval, state requirements and an approved fauna management plan.

Set trap lines or camera stations across each mapped habitat type and along potential connections, and state the number of stations, trap nights, camera nights, spacing and area sampled in the survey report.

Use experienced personnel, suitable shelter and weather protection, and check live traps at the frequency required by the approval and animal welfare procedures.

Use photographic, morphological and genetic confirmation where identification is uncertain, because the Dusky Antechinus complex contains closely differentiated taxa.

Survey methodology: Minimum effort and reporting

  • Do not describe a site as free of the species solely because it was not detected during a short search, because no detection probability or minimum survey effort has been established.
  • Specify the survey area, habitat sampled, dates, methods, nights, hours, trap nights, camera nights, transect lengths, weather and observer effort in the final report.
  • Record all sightings, captures, photographs, carcasses and signs with coordinates, date, habitat description and confidence of identification.
  • Submit confirmed records and suitable negative survey data to the relevant Tasmanian wildlife database and provide records required by the project approval.
  • Reassess the survey design if intact forest is inaccessible, if weather limits detection, or if the proposed clearing extends beyond the surveyed area.

Vegetation associations: Rainforest or vine thicket

Source-checked associations and automatically indexed candidates are separated below. An association does not establish site presence, preference or dependence.

The species has been described from eucalypt forest and sclerophyll rainforest.

Automatically indexed from existing profile text. Not a verified preference, mapped occurrence or habitat requirement. Check the original source and regional qualifiers before use.

Evidence: Unreviewed profile-derived candidate

Confidence: Not independently verified

Region: Scope as described in the quoted profile text; not independently verified. Profile states: TAS.

Habitat use: general

Attribution gap: No sentence-level reference is attached to the original profile block. Review the profile bibliography; this candidate is not source-verified.

Vegetation associations: Eucalypt forest

The species has been described from eucalypt forest and sclerophyll rainforest.

Automatically indexed from existing profile text. Not a verified preference, mapped occurrence or habitat requirement. Check the original source and regional qualifiers before use.

Evidence: Unreviewed profile-derived candidate

Confidence: Not independently verified

Region: Scope as described in the quoted profile text; not independently verified. Profile states: TAS.

Habitat use: general

Attribution gap: No sentence-level reference is attached to the original profile block. Review the profile bibliography; this candidate is not source-verified.

Ecosystem associations

Source-checked associations and automatically indexed candidates are separated below. An association does not establish site presence, preference or dependence.

No species-specific ecosystem association has been indexed or source-checked in this evidence library. This is an evidence gap, not evidence of no association.

Soil and substrate associations

Source-checked associations and automatically indexed candidates are separated below. An association does not establish site presence, preference or dependence.

No species-specific soil association has been indexed or source-checked in this evidence library. This is an evidence gap, not evidence of no association.

Water and wetland associations

Source-checked associations and automatically indexed candidates are separated below. An association does not establish site presence, preference or dependence.

No species-specific water association has been indexed or source-checked in this evidence library. This is an evidence gap, not evidence of no association.

Fauna records and mapped habitat: Not yet analysed

Record locations can be overlaid with mapping, but record frequency alone does not measure habitat preference. No species is excluded from desktop assessments by this analysis.

No quality-controlled record-to-map analysis has been completed for this species. The existing generalised distribution dots and indicative range polygons have not been treated as precise occurrence coordinates.

A defensible run needs dated, independently attributable records, coordinate uncertainty, duplicate and captive-record checks, layer versions and regional scope. Preference and absence require additional survey-effort and detection evidence.

Habitat limitations and contrary evidence: No supported exclusion recorded

Not recorded is not the same as cannot occur. Low suitability, resident habitat, breeding habitat and occasional movement are different conclusions.

This library has not established a vegetation, ecosystem or soil-type exclusion for this species. This does not mean all habitat is suitable; the evidence needed to justify an exclusion has not been assembled.

Habitat limitations and contrary evidence: Before using a negative association

  • Confirm the taxon, geographic region, life stage and habitat function covered by the evidence.
  • Check survey methods, season, repeated effort and detectability before interpreting non-detection.
  • Investigate credible contradictory records and microhabitats absent from broad mapping.
  • Do not convert a missing map class, low record count or failed data request into species absence.

Before habitat disturbance: Avoid and minimise

Treat occupied or potentially occupied intact forest as a planning constraint. The species was described from remote south-eastern Tasmania, and most of its limited habitat was reported to be in state forest subject to logging.

  • Avoid clearing intact forest on the Tasman Peninsula wherever practicable, particularly where it forms a larger stand or connects otherwise isolated forest patches.
  • Retain continuous vegetation between retained stands so that clearing does not create additional isolated patches.
  • Keep disturbance within the approved footprint and retain mature forest, dense understorey, fallen timber and other natural ground cover wherever they occur.
  • Use existing cleared areas and previously disturbed corridors for access, compounds and services where practicable.

Before habitat disturbance: Approvals and work planning

Reported breeding period: Two to three weeks.

Tasman Peninsula habitat: Eucalypt forest and sclerophyll rainforest, including small fragmented stands of intact forest.

  • Confirm the current EPBC Act status before works commence. The species is recorded as not listed under the EPBC Act.
  • Check Tasmanian threatened fauna requirements, permits, animal ethics approvals and any land manager conditions because the species is listed as Vulnerable in Tasmania.
  • Prepare a fauna management plan that identifies survey limits, authorised personnel, handling procedures, stop-work triggers, release sites, injury response and reporting requirements.
  • Plan staging so that the smallest practicable area is opened at one time and retained habitat remains connected throughout construction.
  • Schedule clearing outside the species' reported two to three week breeding period where the ecologist and regulator can identify a suitable local timing window.

Before habitat disturbance: Site preparation

  • Complete a pre-clearance survey immediately before clearing, using the approved targeted methods and checking all vegetation and ground habitat within the disturbance footprint.
  • Mark the approved clearing boundary, retained forest, movement links, exclusion zones and any habitat features that must not be disturbed.
  • Install and maintain exclusion fencing where it can safely prevent entry into the work area without blocking movement between retained habitat patches.
  • Brief machinery operators and all spotter catchers on the species' identification, the approved footprint and the animal discovery procedure before each clearing shift.

During habitat disturbance: Daily controls and machinery interface

Use staged, supervised clearing. A fauna spotter catcher should have authority to pause machinery whenever an animal, carcass, potential refuge or unexpected habitat condition is found.

  • Hold a pre-start briefing each day covering the clearing boundary, retained habitat, exclusion zones, weather, access routes, spotter catcher positions and the stop-work process.
  • Inspect the work area each morning for animals, fresh carcasses, damaged exclusion fencing and changes to the approved footprint.
  • Keep the fauna spotter catcher in a safe position with clear communication to the operator and stop machinery before the spotter catcher enters or approaches the work area.
  • Clear vegetation progressively, directionally and in small stages towards retained habitat where this is safe and approved, rather than opening the whole footprint at once.
  • Do not allow machinery to resume until the spotter catcher has inspected the immediate work area and given a clear instruction.

During habitat disturbance: Habitat feature handling

  • Inspect hollow-bearing trees, fallen logs, rocks, dense ground cover, burrows and other potential refuges before they are moved or destroyed.
  • Retain habitat features in place where they are outside the approved footprint, and clearly mark them to prevent accidental damage.
  • Move logs, rocks and other salvageable ground features only under the fauna management plan and place them in nearby retained forest with similar cover and moisture conditions.
  • Treat wetlands, drainage lines and damp forest margins as exclusion areas unless the approval specifically allows disturbance.
  • Use a staged dismantling or felling procedure for trees with hollows or dense cover, with the spotter catcher present and machinery stopped during inspection.

During habitat disturbance: Animal capture, release and injury response

  • Stop work immediately when an antechinus is found, and keep people, vehicles and machinery away from the animal.
  • Allow only authorised and appropriately trained personnel to capture, handle or release the animal, using the method approved for the project.
  • Identify the animal as far as practicable, photograph it without delaying release, and record its location, condition, habitat and direction of movement.
  • Release an uninjured animal into nearby retained habitat that is connected to the remaining forest and approved by the project ecologist.
  • Do not relocate an animal across roads, cleared land or an ecological barrier unless the approval and fauna management plan specifically allow it.
  • Transfer an injured animal promptly to the nominated veterinarian or wildlife carer and record the handover.

During habitat disturbance: Stop-work triggers and records

  • Stop clearing if the species is detected, if a carcass is found, if a potential refuge cannot be inspected, if exclusion fencing fails, or if clearing moves outside the approved footprint.
  • Stop work and seek ecological advice if more suitable habitat is found than was identified in the pre-clearance assessment.
  • Record every detection, capture, release, injury, death, habitat feature affected, machinery pause and corrective action with coordinates and photographs where safe.
  • Notify the project environmental officer and the relevant regulator or land manager within the timeframe set by the approval or fauna management plan.

After habitat disturbance: Post-clearance checks

Completion of clearing does not end the fauna controls. Check the disturbed area, retained forest and release sites before demobilising the clearing crew.

  • Complete a final fauna inspection of the cleared footprint, retained edges, access tracks, stockpiles and any moved logs or rocks.
  • Search for injured or trapped animals and carcasses, and apply the approved injury, release and reporting procedures.
  • Remove or modify temporary fencing only after the fauna spotter catcher and project ecologist confirm that it is no longer needed and that movement routes remain safe.

After habitat disturbance: Monitoring and compliance

  • Monitor retained forest, connecting vegetation and release sites using the same methods and effort recorded for the pre-clearing survey where comparison is required.
  • Check for further clearing, weed invasion, erosion, fire damage, predator impacts and loss of ground cover around retained habitat.
  • Maintain exclusion zones and access controls until construction risks have passed and the environmental officer signs them off.
  • Report survey results, incidents, deaths, relocations, rehabilitation actions and database submissions to the approval authority and land manager.

After habitat disturbance: Offsets and corrective action

  • Apply any offset, restoration or compensatory habitat requirement imposed by the approval or Tasmanian threatened fauna authority.
  • Use additional protection or restoration if monitoring shows that retained stands are becoming more isolated or that habitat condition is declining.
  • Review the fauna management plan after any detection, injury, mortality or unplanned habitat loss.

Rehabilitation actions: Re-establish suitable forest structure

Rehabilitation should rebuild connected forest habitat on the same site and support the intact forest conditions associated with the species. No particular plant species or restoration timeframes have been identified.

  • Replant locally appropriate eucalypts and sclerophyll rainforest plants from the pre-clearing vegetation community, using local provenance where required by the land manager.
  • Restore dense understorey and ground cover rather than establishing open, heavily managed plantings.
  • Link revegetated areas to retained forest and avoid narrow isolated plantings that do not restore connectivity.
  • Protect new plantings from browsing, trampling, vehicles, weeds and uncontrolled fire until the project ecologist confirms that they are established.

Rehabilitation actions: Retain and replace habitat features

  • Leave suitable fallen timber and rocks in rehabilitated areas where they do not create a safety or fire-management conflict.
  • Replace moved logs and rocks in contact with the ground and within connected retained or rehabilitated forest, following the approved salvage plan.
  • Retain existing hollow-bearing trees and allow replacement trees to mature; install nest boxes only where a species-appropriate design, location and monitoring plan has been approved.
  • Do not treat nest boxes as a substitute for retaining natural forest habitat.

Rehabilitation actions: Threat and fire management

  • Control weeds so that native understorey and ground cover can recover in rehabilitated and retained forest.
  • Manage introduced predators and domestic animal access where the land manager identifies them as a risk to the recovering fauna community.
  • Use a site-specific fire plan that protects retained and regenerating eucalypt forest and sclerophyll rainforest, and do not apply burns without the required ecological and land management approvals.
  • Prevent new fragmentation from tracks, compounds and maintenance activities after rehabilitation.

Rehabilitation actions: Success measures and monitoring

  • Set measurable rehabilitation targets for native plant survival, vegetation cover, connectivity, weed cover, retained ground habitat and protection of hollow-bearing trees.
  • Monitor rehabilitated and reference forest with repeat fauna surveys using documented spotlighting, trapping or camera methods, and report the number of nights, hours, stations and detections.
  • Continue monitoring until the project ecologist and approval authority agree that habitat structure and fauna management targets have been met.
  • Submit confirmed records from rehabilitation areas to the relevant Tasmanian wildlife database.

Sources