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Brigalow Woodland Snail (Adclarkia cameroni)

The Brigalow woodland snail is a land snail endemic to south-east Queensland. It occurs in remnant Brigalow and eucalypt woodland, with moist, debris-rich riparian habitat along the Condamine River especially important where surrounding land has been cleared.

Conservation status

Commonwealth, EPBC Act 1999: Endangered.

Queensland, Nature Conservation Act 1992: Endangered.

Seasonal planning

Surveys are best undertaken from October to March, during summer storms and rain.

Seasonal evidence: From published sources for this species.

Timing varies between sites and years.

  • Survey period: Surveys are best undertaken from October to March, during summer storms and rain.

Identification: Appearance

This small, ground-dwelling snail has a pale, finely patterned shell.

This small, ground-dwelling snail has a pale, finely patterned shell.

Identification: Confirming identity

Confirm the identity of any suspected record with a specialist and a photograph or voucher, as required by the relevant permit.

Distribution: Known range

It occurs in south-east Queensland on the Condamine River floodplain, particularly around Dalby and Chinchilla. Its known habitat includes scattered woodland patches and riparian corridors.

It occurs in south-east Queensland on the Condamine River floodplain, particularly around Dalby and Chinchilla. Its known habitat includes scattered woodland patches and riparian corridors.

Distribution: National mapping

The Commonwealth species distribution model (SNES) maps where the species or its habitat is known, likely or may occur. Use it with local records and site inspection.

Habitat: Habitat

The snail inhabits remnant Brigalow and eucalypt woodland, including road verges and riparian corridors on alluvial black soils. Dense canopy, stable moisture, leaf litter and coarse woody debris are important habitat features.

The snail inhabits remnant Brigalow and eucalypt woodland, including road verges and riparian corridors on alluvial black soils. Dense canopy, stable moisture, leaf litter and coarse woody debris are important habitat features.

Foraging habitat: Diet

It helps break down leaf litter and recycle nutrients into the soil.

It helps break down leaf litter and recycle nutrients into the soil.

Breeding habitat: Breeding

Not documented in the published sources used for this profile.

Not documented in the published sources used for this profile.

Sheltering habitat: Shelter

During the day, it shelters in leaf litter and beneath logs and other ground debris. It is active at night after rain.

During the day, it shelters in leaf litter and beneath logs and other ground debris. It is active at night after rain.

Threats: Threats

Habitat is affected by clearing, stock grazing and fire, which can also cause excessive drying. Fragmentation and degradation of remaining woodland leave the species vulnerable to drought and further habitat disturbance.

Habitat is affected by clearing, stock grazing and fire, which can also cause excessive drying. Fragmentation and degradation of remaining woodland leave the species vulnerable to drought and further habitat disturbance.

Threats: Works risk

Clearing or construction that removes woodland or drainage-line habitat can directly affect the snail and its habitat. Disturbance to leaf litter, coarse woody debris or moist refuges may also degrade habitat used by the species.

Survey methodology: 1. Species-specific methods

Use methods consistent with the Commonwealth survey guidelines and engage a specialist with the right permits.

The species was recorded during an autumn survey in an ephemeral drainage line with leaf litter and coarse woody debris.

Survey methodology: 2. Commonwealth guidance

For EPBC Act referrals, survey effort and methods should be consistent with the on-ground surveys and data for referred actions under the EPBC Act, read with the Significant impact guidelines 1.1.

Survey methodology: 3. Limits

A non-detection is not proof of absence. Match survey timing to the species and season, and record effort.

Vegetation associations: Woodland

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

The snail inhabits remnant Brigalow and eucalypt woodland, including road verges and riparian corridors on alluvial black soils.

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: QLD.

Habitat use: general

Vegetation associations: Acacia, mulga or brigalow

The snail inhabits remnant Brigalow and eucalypt woodland, including road verges and riparian corridors on alluvial black soils.

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: QLD.

Habitat use: general

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: Cracking clays or gilgai

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

The snail inhabits remnant Brigalow and eucalypt woodland, including road verges and riparian corridors on alluvial black soils.

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: QLD.

Habitat use: general

Soil and substrate associations: Alluvial flats and floodplains

It occurs in south-east Queensland on the Condamine River floodplain, particularly around Dalby and Chinchilla.

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: QLD.

Habitat use: general

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 disturbance: 1. Desktop and approvals

Confirm whether the project could affect the species before works begin.

Check national mapping, state records and recent surveys for the site. An action likely to have a significant impact on this nationally listed species needs EPBC Act referral, and state permits apply where it is state listed.

Before disturbance: 2. Plan to avoid

Design the footprint, timing and access to avoid known or likely habitat, and brief crews on what to look for and who to call.

During disturbance: 1. Controls

Keep works inside the approved footprint and conditions.

Fence or mark habitat to be retained and keep machinery, stockpiles and spoil out of it.

During disturbance: 2. Stop and report

If the species is found unexpectedly, stop work at that spot and contact the project ecologist and the relevant agency.

After disturbance: 1. Records

Record outcomes.

Record sightings, habitat lost or retained and any injury or death, and report them under the approval conditions.

Rehabilitation: 1. Restore

Restore disturbed habitat where possible.

Reinstate disturbed ground with local species, return logs, rocks and litter, and control weeds and erosion until the site is stable.

Sources