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Little Forest Bat (Vespadelus vulturnus)

The Little Forest Bat is a very small Australian microbat found across New South Wales, Queensland, South Australia, Tasmania and Victoria. On works sites, tree hollows, dead timber, roofs and other roosts can support several bats or a maternity group, so clearing and disturbance need careful planning. The species is currently listed as least concern, but in Queensland it is treated as a least concern colonial breeder, and disturbing a breeding place requires a high risk species management program.

Conservation status

Queensland, Nature Conservation Act 1992: Colonial breeder. Least concern in Queensland, but it breeds in colonies, so tampering with a breeding place needs a high risk species management program rather than the low risk program.

Breeding season

The Little Forest Bat breeds in Australia during the warmer months. Births are recorded in November and December, although timing can vary between regions and years, and detailed breeding information remains limited.

Breeding mode: Colonial breeder. Females use shared roosts or maternity roosts, where young may be left while mothers forage at night.

Breeding frequency: Once a year.

Litter size: One young.

Birth timing: November to December has been recorded for this species. More broadly, microbats usually give birth during the warmer months, from spring to late summer.

Incubation or gestation: Not recorded.

Fledging, weaning and maturity: Not recorded. Young are dependent in the roost before they can fly, and mothers return during the night to feed them.

Colonies and breeding places: Roosts include old tree hollows, dead sections of live trees, buildings, building roofs and timber stacks. Other suitable microbat roosts can include fissures, loose bark, caves, mines, culverts and bridges. Recorded numbers range from 1 to 120 bats exiting a single roost tree, with a median of 20, while another account describes colonies of up to 50 bats. These figures do not confirm that every aggregation was a maternity colony. Site fidelity is not recorded, so all occupied roosts should be treated as potentially significant. An active breeding place may show pregnant or lactating females, pups, repeated bat use, regular emergence, or bats returning to the same hollow or structure. Confirm use with evening emergence watches, acoustic detectors such as Anabat, and, where appropriate, harp traps or mist nets. Inspect trees with an endoscope or pole camera only where this can be done safely and without disturbing bats. Colonies need special care because one roost can hold a substantial share of the local population, and disturbance can separate mothers from dependent young.

Timing may shift between years and regions, so confirm local roost use and breeding status before clearing, particularly in hollow bearing trees, buildings and other enclosed structures.

  • Breeding and births: Breeding is associated with the warmer months, with births recorded in November and December.
  • Dependent young in maternity roosts: Young remain dependent in the roost before they can fly, and mothers return during the night to feed them.
  • Roosting colonies and maternity roosts: Roosts may be in tree hollows, dead timber, buildings, roofs or timber stacks, with larger shared roosts expected during the breeding period.
  • Night foraging and roost emergence: Adults forage at night in forest and typically emerge around civil twilight.
  • Highest clearing risk: Clearing or disturbance is most likely to harm colonies, maternity roosts and dependent young from spring through late summer, especially around November and December births.

Identification: Appearance

The Little Forest Bat is a very small microbat with a distinctly bicoloured coat. It is easily overlooked during tree clearing because it can shelter in narrow hollows, dead timber and building roofs.

The fur is darker at the base and distinctly bicoloured. The ears and wings are pale, and the tragus is often white.

No body measurements are included here. Treat very small bats with pale ears and wings as potential Little Forest Bats until an appropriately experienced person confirms the identification.

Identification: Calls and similar species

The species uses ultrasonic echolocation calls that are not audible to most people. A bat detector such as an Anabat or similar unit can help locate and assess activity, but acoustic identification should be checked by an experienced bat ecologist because microbat calls can overlap.

Similar species can be difficult to separate in the hand and from recordings. Use a combination of size, colour, features, call characteristics, roost information and expert review.

Identification: Field signs

Look for small accumulations of bat guano below hollows, roof spaces, bridge joints, culverts and other sheltered roosts. Guano alone does not confirm the species or an active maternity roost.

Other useful signs include repeated bat emergence at dusk, bats returning to the same opening, staining around a roost entrance, accumulated debris below a hollow, and audible movement or squeaking within a structure. Avoid relying on odour or a single sign, as roost conditions vary.

  • Use an emergence watch to check suspected roosts around dusk.
  • Use an endoscope or pole camera only where the inspection can be completed safely and without disturbing bats.
  • Record the roost entrance, surrounding dead timber, nearby vegetation and any evidence of recent use.

Distribution: Australian range

The Little Forest Bat is mapped in New South Wales, Queensland, South Australia, Tasmania and Victoria. Records span several Australian environments, from forests and woodlands to mallee and developed areas with suitable roosts.

Plan for the species in suitable habitat across:

Its mapped range includes mainland eastern and southern states and Tasmania. Local absence from a database or previous survey does not demonstrate that a site is unused.

  • New South Wales
  • Queensland
  • South Australia
  • Tasmania
  • Victoria

Distribution: Regional site context

The species has been recorded in wet and dry sclerophyll forest, River Red Gum environments, montane and dry woodland, and mallee. It can also use buildings, timber stacks and other modified structures.

On a project site, assess both native vegetation and built features. A small remnant or isolated group of old trees can still contain suitable roosts.

Distribution: Survey planning

Use habitat assessment, daytime roost inspection, acoustic detection and dusk observations together. Where clearing may affect hollow-bearing trees or structures, survey before works and retain records of all potential roosts.

There is no single survey method that will detect every bat or confirm every roost. Consider repeat observations where the risk is high, especially during the warmer months when microbats form breeding colonies.

Habitat: Vegetation types

The Little Forest Bat uses a range of forest and woodland habitats. For clearing assessments, focus on old trees, dead timber and structures that provide hollows, cracks or enclosed spaces.

Potential habitat includes wet and dry sclerophyll forest, River Red Gum communities, montane and dry woodland, and mallee. Remnant woodland within otherwise cleared or developed land can remain suitable.

Assess the whole site, not just intact canopy. Dead standing trees and dead sections of live trees can be more useful for roosting than healthy trees.

Habitat: Features to retain and inspect

Look for trees with multiple hollows, loose bark, dead limbs, fissures and broken branches. Pay particular attention to severely decayed eucalypt remains and dead sections of live trees.

The presence of a hollow does not confirm occupancy. It does indicate that the tree should be assessed before removal, particularly if several suitable trees occur together.

  • Hollow-bearing trees
  • Dead standing trees and fallen timber stacks
  • Loose bark and tree fissures
  • River margins, woodland edges and connected remnant vegetation
  • Roofs, bridges, culverts and other enclosed structures

Habitat: Site assessment

Map potential roost trees and structures before machinery enters the work area. Include trees proposed for removal, trees that may be damaged by access or vibration, and trees close enough to be affected by felling.

Where a project contains many old or dead trees, have a fauna spotter catcher or bat ecologist assess the site before finalising the clearing method.

Foraging habitat: Foraging areas

The Little Forest Bat hunts small insects in forests and woodlands. It is an agile flier that can manoeuvre through vegetation, so connected cover and insect-rich edges can be useful around a roost.

Look for forest, woodland, mallee, River Red Gum vegetation, riparian edges and remnant patches with a layered structure. The species may forage around tree crowns, gaps, edges and sheltered flight paths.

Retain links between roost trees and nearby vegetation where practicable. Avoid treating a roost tree as an isolated feature when surrounding habitat may support nightly movements.

Foraging habitat: Food

The diet includes bugs, beetles, flies, ants, moths, cockroaches, spiders, grasshoppers and lacewings. Prey is usually taken in flight, although large prey may be eaten after the bat lands on a tree.

Lighting can change insect behaviour and bat flight paths. Keep unnecessary night lighting away from retained vegetation, roost entrances and movement corridors.

Foraging habitat: Field assessment

Use ultrasonic detectors to identify bat activity along vegetation edges, near water, beneath canopy and around suspected roosts. Record the time, weather, location and habitat beside each detector station.

Detector results show activity, not necessarily a colony or maternity roost. Combine acoustic records with roost inspections and emergence observations before making a clearing decision.

Breeding habitat: Breeding period

The Little Forest Bat breeds in the warmer months and usually produces one young each year. A maternity roost is a breeding place when females raise young there, even if the roost is small or used for only part of the night.

Breeding occurs in summer, and single young have been recorded in November and December. More generally, microbats give birth during the warmer months, usually from spring to late summer.

Timing can vary with region and conditions. Do not assume that a roost is inactive only because no bats are seen during a brief daytime inspection.

Breeding habitat: Maternity roost features

A maternity roost may be in a tree hollow, fissure, loose bark, cave, mine, culvert, bridge, roof space or other building feature. The Little Forest Bat has been recorded using old tree hollows, buildings, timber stacks and building roofs.

Females may carry young when they leave to feed. When a pup is too large to carry but cannot yet fly, the mother leaves it in the roost and returns during the night to feed it.

Breeding habitat: Confirming a breeding place

The strongest confirmation is direct evidence of pregnant or lactating females, dependent pups, or young bats left in the roost. Repeated emergence of many bats from one entrance during the breeding season also warrants conservative treatment.

Use a combination of acoustic survey, harp trap or mist net survey where lawful and appropriate, dusk emergence watches, and safe inspection with an endoscope or pole camera. Trapping and internal inspections must be planned to avoid injury and unnecessary disturbance.

  • Pregnant or lactating females
  • Dependent pups or newly volant young
  • Repeated use of one roost entrance
  • Bats remaining in a roost while adults emerge
  • Guano or other fresh signs associated with current use

Breeding habitat: Work controls

Do not remove or seal a suspected maternity roost until its status and the required approvals are resolved. Where hollow-bearing trees must be removed, use a staged or soft felling method under a fauna spotter catcher’s direction.

Exclusion devices should be installed only outside the maternity season and only after confirming that dependent young are not present. Bat boxes may provide supplementary habitat, but they do not replace the retention of suitable natural roosts.

Sheltering habitat: Natural roosts

Roosts can occur in natural hollows and in built structures. Female bats may use several roost trees, so one inspection or one empty hollow does not establish that a site is unused.

Known or potential natural roosts include hollows in old trees, dead sections of live trees, severely decayed eucalypt remains, loose bark and fissures. In a Phillip Island study, all tracked female roosts were in dead timber.

The roost trees had many hollows and reduced canopy cover. Roost trees were not distinguished from available trees by height or diameter, so apparently ordinary trees can still be important.

Sheltering habitat: Built and artificial roosts

Inspect building roofs, roof cavities, timber stacks, bridges, culverts, mines and caves where present. Some bats may share a nest or enclosed space with possums, so inspect carefully and identify all occupants before works.

Check joints, cracks, expansion gaps, bridge beams, culvert entrances, loose roofing and sheltered cavities. A roost may be concealed from ground level.

Sheltering habitat: Survey and handling

Use daytime inspection where safe, followed by a dusk emergence watch. Emergence from a roost is strongly associated with civil twilight, so observers should be positioned before bats are expected to leave.

Do not handle bats unless necessary and authorised. Use trained personnel, appropriate personal protective equipment and disease precautions. Keep noise, light and access around a suspected roost to a minimum.

  • Acoustic detector survey
  • Dusk emergence watch
  • Endoscope or pole camera inspection
  • Harp trap or mist net survey, where appropriate and authorised
  • Mapping of alternative roosts and nearby retained vegetation

Sheltering habitat: Roost management

Retain occupied and potential roost trees wherever practicable. If removal is unavoidable, use two-stage or soft felling, inspect sections as they are lowered, and provide a safe opportunity for bats to move away.

Exclusion devices can be considered outside the maternity season after confirming that no young remain. Supplementary bat boxes can be installed nearby, but their uptake is not guaranteed and they should not be used as the only mitigation.

Colonies and breeding places: What a colony looks like

The Little Forest Bat is a colonial breeder. A colony or maternity roost may be a group of bats sharing one hollow, roof space or other shelter, and one breeding place can contain a substantial part of the local population.

A colony may be hidden inside a hollow tree, dead timber, roof cavity, bridge, culvert, cave, mine or other enclosed space. Bats may be difficult to see during the day and may emerge from a narrow opening over several minutes.

Reported group sizes vary. Up to 50 bats have been reported roosting together, while a Phillip Island study recorded 1 to 120 bats leaving individual roost trees. Those observations do not all represent confirmed maternity colonies.

Colonies and breeding places: Site fidelity and roost switching

Individual bats may use more than one roost tree or structure. A colony can also move between nearby roosts as conditions change, while returning to the same local area or roost network.

A roost that appears empty on one visit may be used later. Treat suitable hollows and structures as potential roosts until survey and seasonal information support a different conclusion.

Colonies and breeding places: Recognising an active breeding place

Look for repeated emergence, fresh guano, bats returning to the same entrance, and activity from females during the breeding season. Confirmation is strongest when pregnant or lactating females, pups or dependent young are observed.

Use Anabat or similar acoustic equipment, emergence watches, and targeted harp trap or mist net surveys where suitable. Inspect hollow-bearing trees with an endoscope or pole camera only when this can be done safely and without harming bats.

  • Observe the roost at dusk from a safe distance.
  • Record emergence numbers, direction of flight and return activity.
  • Check for dependent young before any sealing, exclusion or removal.
  • Map nearby alternative hollows and connected vegetation.

Colonies and breeding places: Why colonies need special care

Colonial breeders concentrate many animals in a small number of places. Removing one maternity roost can therefore affect more bats than the number seen during a daytime inspection suggests.

In Queensland, tampering with the breeding place of this least concern colonial breeder requires a high risk species management program under the Nature Conservation (Animals) Regulation 2020. Check the current approval pathway before works, and involve the relevant regulator and a suitably experienced ecologist.

Threats: Loss of hollow-bearing trees and dead timber

The main works site risks are loss of roosts, disturbance of maternity colonies and removal of surrounding vegetation. Careful pre-clearing surveys and staged methods can reduce the chance of killing or displacing bats.

Clearing old trees, dead standing timber and dead sections of live trees can remove roosts that are difficult to replace. Planned removal of dead timber has been identified as a management concern for this species.

Retain hollow-bearing trees and safe dead timber where practicable. Mark them clearly and protect them from machinery, access tracks, stockpiles and accidental damage.

Threats: Clearing and development

Forestry, agricultural clearing and housing development can remove roost sites and feeding habitat. Construction can also affect buildings, bridges, culverts and roof spaces used by bats.

Survey the full disturbance footprint and nearby structures before clearing. Include trees that may be indirectly affected by vibration, altered drainage, lighting or changed access.

Threats: Disturbance, exclusion and entrapment

Sealing a roof, hollow or bridge gap while bats are inside can trap or kill animals. Excluding adults while dependent young remain can also cause deaths.

Schedule exclusions outside the maternity season where possible. Use one-way devices only after confirming that young are absent, and monitor the structure after installation.

Threats: Practical controls

Use a fauna spotter catcher and a staged or soft felling method for trees that cannot be retained. Stop work if bats, pups or an occupied roost are found and reassess the method before continuing.

Limit night lighting near retained roosts and vegetation. In Queensland, confirm whether a high risk species management program is required before disturbing a suspected breeding place.

  • Retain and protect hollow-bearing trees.
  • Complete pre-clearing roost and activity surveys.
  • Use emergence watches and acoustic monitoring at higher-risk sites.
  • Apply staged or soft felling under supervision.
  • Install supplementary bat boxes only as an additional measure, not as a substitute for natural roost retention.

Survey methodology: 1. Desktop assessment

Survey for the Little Forest Bat should combine acoustic detection with targeted roost searches. Use extra care during the warmer months, when microbats may be raising young in shared roosts.

Map old trees, dead standing timber, hollow-bearing trees, buildings, bridges, culverts, caves, mines, timber stacks and other enclosed structures. Include nearby forest, woodland, mallee, River Red Gum habitat and likely movement corridors.

Review previous records and determine whether the site contains potential colonies, maternity roosts or other breeding places. The species is small and can be difficult to distinguish from other microbats, so plan for confirmation by a suitably experienced ecologist.

Useful roost clues: Old trees with hollows, dead timber, building roofs, bridges, culverts, caves, mines and timber stacks

Known roost count from one study: 1 to 120 bats exited a single tree, with a median of 20

  • Check planning, clearing and fauna protection requirements for the relevant state or territory.
  • Identify areas where roost loss, lighting, noise, vibration or tree felling could affect bats.
  • Plan access, equipment locations and exclusion areas before fieldwork starts.

Survey methodology: 2. Acoustic survey

Use an Anabat or similar full spectrum or zero crossing detector at likely flyways, water points, woodland edges and near potential roosts. Acoustic records can confirm bat activity and assist with species identification, but they do not by themselves confirm a breeding place.

Survey around dusk and through the early night, when bats leave roosts and begin foraging. Repeat visits may be needed because weather, season and local activity affect detection.

Emergence timing: Roost emergence is strongly associated with civil twilight

Breeding season guidance: Most microbats raise young in the warmer months, usually spring to late summer

  • Use suitable weather with low wind and no heavy rain.
  • Record detector location, date, start and finish time, weather, habitat, equipment and settings.
  • Keep the original sound files and have difficult calls checked by a qualified bat ecologist.
  • Treat an acoustic record as evidence of activity, not proof that a roost is occupied.

Survey methodology: 3. Trapping and emergence checks

Use harp traps or mist nets only under an approved survey design and by people experienced in microbat handling. Place traps on flyways and near, but not across, likely roost entrances unless the method has been assessed as safe.

Carry out emergence watches at potential roosts. Count bats, record the direction of flight and note whether adults return to the same structure.

  • Inspect traps frequently and release bats promptly.
  • Record sex, age class, reproductive condition, species identification, capture location and release time.
  • Do not trap at a maternity roost if the work could strand young or disrupt returning females.
  • Use trapping results with acoustic data and roost inspection findings.

Survey methodology: 4. Roost and breeding-place inspection

Inspect hollow-bearing trees, buildings, culverts, bridges and other structures from the ground first. Where safe and authorised, use an endoscope or pole camera to inspect hollows and cavities.

A maternity roost is supported by pregnant or lactating females, pups, dependent young, repeated adult entry and exit, or young left in the roost while mothers forage. A breeding place may be occupied even when no bats are visible during a brief inspection.

  • Conduct emergence and re-entry watches where direct inspection is inconclusive.
  • Record entrance height, orientation, cavity condition, tree condition, signs of use and any visible bats or young.
  • Do not place hands into hollows or cavities.
  • Use a qualified arborist where tree access, climbing or felling is proposed.

Before habitat disturbance: 1. Approvals and permits

Avoid roosts and breeding places wherever practicable. Resolve approval and permit requirements before equipment arrives, and give the fauna spotter catcher authority to pause or stop work.

Check the applicable state and local requirements before clearing, demolition or construction. Confirm whether the proposal may affect a matter protected under the Environment Protection and Biodiversity Conservation Act 1999 and whether an EPBC referral is required.

In Queensland, treat the Little Forest Bat as a least concern colonial breeder for breeding-place management. Tampering with its breeding place requires the high risk species management program pathway under the Nature Conservation (Animals) Regulation 2020, rather than the low risk pathway used for other least concern animals.

Queensland classification: Least concern colonial breeder

Queensland management requirement: High risk species management program for tampering with a breeding place

  • Obtain any state or territory fauna permits, scientific licences, relocation approvals and clearing approvals that apply.
  • Confirm the approved method, timing, exclusion process, reporting requirements and people authorised to handle bats.
  • Keep approvals and conditions available on site.

Before habitat disturbance: 2. Avoidance and timing

Retain hollow-bearing trees, dead standing timber and structures that provide roosts wherever possible. This is especially important because females have been recorded using dead and partly dead eucalypt timber with many hollows.

Schedule high-risk work outside the local maternity period where practicable. Microbats commonly raise one pup in the warmer months, usually spring to late summer, and Little Forest Bat young have been recorded in November and December.

  • Do not remove a suspected maternity roost while dependent young may be present.
  • Treat any colony or shared maternity roost as a high-sensitivity location.
  • Obtain site-specific ecological advice where breeding timing is uncertain.
  • Do not assume that winter work is risk free if a roost remains occupied or if local conditions differ.

Before habitat disturbance: 3. Buffers and exclusion

Set a no-go area around each confirmed or suspected roost, breeding place and active colony. The size should be based on the structure, species behaviour, work method, vibration, lighting and approval conditions rather than a generic distance.

Do not seal, block, illuminate or otherwise alter a roost until an ecologist has confirmed that no dependent young will be trapped inside.

  • Mark the exclusion area on plans and on the ground.
  • Fence or flag retained trees and structures before machinery starts.
  • Use exclusion devices only outside the maternity season and only where the roost can be safely vacated.
  • Make exclusion devices one-way and check them for trapped or stranded bats.
  • Remove the device only after an ecologist confirms that the roost is no longer in use.

Before habitat disturbance: 4. Pre-clearance survey and tree controls

Complete a pre-clearance inspection shortly before works. Recheck all hollow-bearing trees, dead timber, buildings and other potential roosts because occupancy can change.

Use a two-stage or soft-felling method for hollow-bearing trees where removal is approved. Lower sections carefully and leave them undisturbed long enough for any bats to leave under supervision.

  • Inspect tree hollows with an endoscope or pole camera where safe.
  • Carry out an emergence watch for trees or structures with likely roost entrances.
  • Retain felled hollow sections on site where this is safe and consistent with the approval.
  • Stop work if bats, pups, a colony or an active breeding place is found.
  • Do not use bat boxes as a substitute for retaining a confirmed maternity roost.

Before habitat disturbance: 5. Induction and site controls

Brief all workers, machine operators and subcontractors before work starts. Show them the marked exclusion areas and explain that small bats may be hidden in hollows, roofs, stacks and cavities.

Include the fauna spotter catcher, project ecologist and emergency contacts in the site communication plan.

  • Explain the stop-work signal and reporting chain.
  • Prohibit unauthorised handling, chasing, blocking of entrances and removal of roost material.
  • Control night lighting near roosts and retained habitat.
  • Keep machinery, spoil, waste and access tracks outside exclusion areas.
  • Confirm that the spotter catcher can stop work without seeking further approval from the machine operator.

During habitat disturbance: 1. Sequential clearing

Clear in a controlled sequence, starting with low-risk areas and retained habitat protection. Stop immediately when a bat, colony, roost or breeding place is found in or near the work area.

Complete clearing in stages under the direction of the fauna spotter catcher. Begin with ground cover and low-risk areas, then address trees and structures that have been inspected and approved for removal.

Use soft felling for hollow-bearing trees where required. Keep people and machinery clear while cavities and hollow sections are checked.

  • Remove limbs and tree sections slowly and lower them rather than dropping them.
  • Pause between stages to allow any mobile bats to leave.
  • Inspect felled sections, cavities, roof spaces and debris before relocation or disposal.
  • Keep retained dead timber and hollow sections stable and protected.

During habitat disturbance: 2. Stop-work triggers

The fauna spotter catcher must stop work if a bat is seen, heard or found in a tree, structure, machine, debris pile or exclusion area. Stop also if a colony, pup, pregnant or lactating female, active roost or suspected breeding place is identified.

Do not restart until the ecologist has assessed the find and confirmed the approved response.

  • Secure the immediate area and prevent machinery movement.
  • Keep people quiet and clear of the entrance.
  • Do not block, smoke, spray, flood, shine strong lights into or enter the roost without approval.
  • Photograph the location from a safe distance and record the structure, time and circumstances.
  • Contact the project ecologist and the relevant fauna authority where required by the approval.

During habitat disturbance: 3. Handling and release

Only authorised and competent people may handle bats. Use appropriate personal protective equipment and approved containment, handling and release procedures.

Do not handle a bat unnecessarily. A bat found in a safe position should be left undisturbed while advice is obtained.

  • Keep a captured bat in a secure, breathable container away from heat, noise and direct sun.
  • Do not give food or water unless directed by a qualified wildlife carer or veterinarian.
  • Release healthy animals only at an approved nearby location and at a suitable time.
  • Do not relocate dependent young away from their mothers or remove adults from an active maternity roost.

During habitat disturbance: 4. Injured or grounded bats

Treat a grounded, injured, entangled or exhausted bat as a wildlife incident. Keep workers and the public away and contact the nominated wildlife carer, veterinarian or fauna authority.

Do not attempt rescue or treatment unless authorised and trained.

  • Record the exact location and condition without crowding the animal.
  • Use an approved container and handling method if a trained person must secure the bat.
  • Maintain separation from people, pets and other animals.
  • Arrange prompt veterinary or wildlife carer assessment.
  • Report any bite or scratch immediately through the project health and safety process.

During habitat disturbance: 5. Field records

Maintain a daily fauna log for all inspections, sightings, captures, exclusions, stop-work events and releases. Good records support compliance and help identify repeated use of a roost.

Link each record to a map, photograph or tree and structure number.

  • Record date, time, weather, location, habitat, species identification and observer.
  • Record the number and condition of bats, sex and reproductive condition where safely determined.
  • Record the work stage, machinery involved, action taken and person who authorised the action.
  • Record all injuries, mortalities, escape events and notifications.
  • Retain acoustic files, photographs, trapping sheets and chain-of-custody details where applicable.

After habitat disturbance: 1. Post-clearance checks

Finish each work area with a careful fauna check and a documented close-out. Use the results to adjust controls in the remaining parts of the project.

Inspect the cleared area, felled timber, buildings, culverts, bridges and retained trees after disturbance. Look for live bats, pups, carcasses, damaged hollows and blocked or altered entrances.

Complete additional dusk checks where a roost was present or where bats were recorded during work.

  • Search machinery, stockpiles, debris and hollow sections before removal.
  • Check that exclusion fences and retained habitat remain intact.
  • Confirm that no bat has been trapped by a sealed cavity, building alteration or temporary structure.
  • Record findings even when no animals are detected.

After habitat disturbance: 2. Monitoring retained roosts

Monitor confirmed and retained roosts according to approval conditions and the risk of the work. Use emergence observations, acoustic detectors or repeat inspections as appropriate.

Continue monitoring where construction noise, vibration, lighting or access changes may affect a roost.

  • Use the same observation point and method where practical so results can be compared.
  • Record bat activity, emergence counts, weather, lighting and nearby works.
  • Check whether retained trees remain stable and whether entrances are still open.
  • Escalate unexpected activity, dead bats or dependent young to the project ecologist.

After habitat disturbance: 3. Relocated and rehabilitated animals

Confirm the outcome for every captured or relocated bat. Obtain advice from the authorised wildlife carer or ecologist before release.

Do not assume that a bat has survived because it was released from a container.

  • Record the receiving carer, veterinarian or release location.
  • Record treatment, holding time, release date and condition at release where available.
  • Check that release sites contain suitable cover and are away from active machinery.
  • Follow up animals that require rehabilitation through the responsible wildlife organisation.

After habitat disturbance: 4. Reporting and incident review

Provide the required reports to the regulator, approval holder and project manager. Report breaches, injuries, deaths, damage to breeding places and unexpected colonies within the required timeframe.

Review the incident with the fauna spotter catcher, ecologist, supervisor and machine operators.

  • Compare actual works with the approved method and timing.
  • Identify whether the survey, exclusion, induction or supervision failed to detect the risk.
  • Update the clearing sequence, controls and induction before work resumes.
  • Keep a final fauna register with maps, photos, permits, survey files and corrective actions.

Rehabilitation actions: 1. Retain and restore roost habitat

Rehabilitation should restore roosting, foraging and movement habitat, not just ground cover. Retain natural hollows and dead timber first, then use supplementary structures where they suit the site and can be maintained.

Protect remaining old trees, hollow-bearing trees and safe dead standing timber. Retain suitable felled hollow sections where they will not create a safety or fire risk.

Restore wet and dry sclerophyll forest, woodland, River Red Gum habitat, montane or dry woodland and mallee appropriate to the local setting.

  • Reconnect retained trees and woodland patches where practicable.
  • Keep fallen timber and coarse woody debris in suitable areas.
  • Protect tree roots and trunks from vehicles, soil compaction and storage.
  • Allow replacement trees to mature and develop hollows over the long term.
  • Avoid removing dead timber solely for tidiness.

Rehabilitation actions: 2. Supplementary roost structures

Use bat boxes, artificial roost structures or retained hollow sections only after assessing the local species, available habitat, aspect, heat exposure, predators and maintenance access. These structures may supplement habitat but do not replace an occupied natural maternity roost.

Nest boxes are not automatically suitable for bats. Select and install structures designed for microbats and obtain advice from a bat ecologist.

  • Place structures near retained woodland and known flight paths.
  • Install them before or soon after habitat disturbance where this is safe and approved.
  • Record location, design, installation date and maintenance responsibility.
  • Inspect structures for occupancy, damage, overheating, pests and water entry.
  • Remove or repair failed structures only outside the local maternity period and under ecological advice.

Rehabilitation actions: 3. Vegetation, weeds and water

Replant locally appropriate native vegetation around retained roosts and along movement routes. Maintain a layered structure that supports insects and provides shelter.

Control weeds without disturbing roost trees, hollow sections or occupied structures.

  • Use local provenance plants where practicable.
  • Keep water points, drainage lines and riparian vegetation protected from sediment and pollutants.
  • Avoid broad night lighting near roosts, water points and movement corridors.
  • Use wildlife-sensitive lighting with the lowest practical intensity and spill.
  • Manage fire, grazing and maintenance activities so retained dead timber remains available where safe.

Rehabilitation actions: 4. Long-term monitoring

Monitor restored habitat and supplementary roost structures over several seasons. Little Forest Bat roost use can change between trees, so assess the wider habitat rather than relying on one box or one tree.

Use acoustic monitoring, emergence watches and inspection of boxes or retained structures where appropriate.

  • Record occupancy, bat activity, signs of breeding and condition of structures.
  • Compare results with baseline survey records.
  • Repair fencing, replace failed structures and control weeds promptly.
  • Review lighting and maintenance practices if bat activity declines.
  • Use monitoring results to guide future clearing, construction and habitat management.

Rehabilitation actions: 5. Rehabilitation close-out

Close out rehabilitation only when the approved planting, roost protection, erosion control and monitoring actions are complete. Keep records that allow future managers to find and maintain all retained and supplementary roost features.

  • Map retained trees, hollow sections, bat boxes and artificial roost structures.
  • Record plant species, planting areas, survival and weed control results.
  • Confirm that access tracks, drainage and lighting do not compromise restored habitat.
  • Assign a land manager and inspection schedule.
  • Retain all monitoring and maintenance records with the site environmental file.

Sources