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Common Sheath-tailed Bat (Taphozous georgianus)

The Common Sheath-tailed Bat is a small insect-eating microbat found in the Northern Territory, Queensland and Western Australia. It roosts in caves, old mines and rock cracks, so cave disturbance, mining, clearing and construction near roosts can affect local bats. It is listed as least concern in Australia, but Queensland treats it as a colonial breeder, and disturbance to 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

Common Sheath-tailed Bats are expected to breed during the warmer months, generally spring to late summer, although timing can vary between regions and years. Species-specific breeding dates and maternity colony details are poorly documented, so use local survey results and field observations to refine the timing.

Breeding mode: A colonial breeder. Females may gather in shared maternity roosts where young are raised.

Breeding frequency and litter size: Most microbats give birth to one pup a year. A species-specific litter size is not recorded for the Common Sheath-tailed Bat.

Breeding timing: Generally spring to late summer in Australia. Species-specific mating, birth and weaning dates are not recorded.

Maternity roosts and breeding places: Known roosts include caves, old mines and cracks in rocks. For microbats generally, breeding places can also include tree hollows, fissures, loose bark, culverts, bridges and buildings.

Colony size and site fidelity: The Common Sheath-tailed Bat may roost in small groups, but typical colony sizes and site fidelity are not recorded. Individuals commonly hang more than 50 centimetres apart.

Recognising an active breeding place: Confirmation is based on pregnant or lactating females, pups or other dependent young. Emergence activity, repeated bat use and calls can help identify a roost, but acoustic results alone do not confirm a maternity roost.

Survey and protection: Use Anabat or similar acoustic detectors, harp traps or mist nets where appropriate, emergence watches, and inspections of hollow-bearing trees with an endoscope or pole camera. Where clearing is unavoidable, use two-stage or soft felling for hollow-bearing trees. Install exclusion devices outside the maternity season, and treat bat boxes as supplementary habitat rather than a replacement for a confirmed breeding place. In Queensland, tampering with a breeding place of this least concern colonial breeder requires the higher risk species management program pathway.

Breeding timing can shift between years and regions, so avoid relying on calendar dates alone and check roost use before clearing or construction.

  • Breeding and pup-rearing: Breeding is expected mainly from spring to late summer, with regional and annual variation.
  • Maternity colonies and dependent pups: Shared maternity roosts may contain a substantial part of the local population while young are dependent.
  • Roosting and nightly foraging: Adults use roosts during the day and forage at night, including over bushes and water.
  • Highest clearing risk: Clearing risk is highest from spring to late summer when maternity roosts may contain pregnant females or dependent pups.

Identification: Appearance

The Common Sheath-tailed Bat is a microbat in the sheath-tailed bat family. Species identification can be difficult in the field, especially when bats are seen briefly or in flight.

The species is identified by its sheath-tailed bat form, but the available species information does not provide a detailed description of body size, weight or diagnostic markings.

Do not rely on a brief flight view for a confident identification. Photographing a safely contained animal, where authorised, can assist an experienced ecologist.

Identification: Calls and similar species

Like other microbats, it uses ultrasonic echolocation to navigate and catch insects. Echolocation recordings can support identification, but a call should be assessed with a reference library and other field evidence.

Hill's Sheathtail Bat, Taphozous hilli, was recognised as a separate species in 1980. Earlier records confused the two species, so locality and expert confirmation may be needed.

  • Use an Anabat or similar detector during suitable evening survey conditions.
  • Treat automated call identifications as supporting evidence rather than proof of species presence.

Identification: Field signs

Look for bats hanging on rock surfaces, near cracks, in cave roofs and in old mine workings. A disturbed bat may move into a narrow crack nearby.

Droppings, urine staining, odour and accumulated guano can indicate a long-used roost, but these signs are not sufficient on their own to confirm the species.

  • Inspect cave and mine entrances, rock overhangs and accessible fissures from a safe distance.
  • Record visible bats, droppings, whitewash, stains, odour, noise and recent disturbance.
  • Do not enter unstable mines or confined spaces without the required risk assessment, permits and controls.

Distribution: Australian range

In Australia, the Common Sheath-tailed Bat is mapped in the Northern Territory, Queensland and Western Australia. Site records should be checked against current state databases because local occurrence can be patchy and survey effort is uneven.

The species occurs across parts of northern and western Australia, including the Northern Territory, Queensland and Western Australia. Project teams should confirm the relevant regional records before clearing or construction begins.

An absence of records does not demonstrate that a site is unused. Roosts can be concealed in cracks, caves, mines and built structures, and bats may be detected only during particular seasons or weather conditions.

  • Check the Queensland, Northern Territory or Western Australian threatened species and wildlife databases relevant to the project.
  • Search the site for suitable roost features even when formal records are nearby but not on the development footprint.

Distribution: Site records

Record the location of every roost feature, detector recording, captured bat and emergence observation. Link records to photographs, habitat descriptions and survey dates.

Where identification is uncertain, retain the recording or image and seek review by a suitably experienced bat ecologist.

Distribution: Movement and timing

Species-specific migration or seasonal movement patterns are not well established for this profile. Avoid assuming that a roost is vacant because bats are not seen during one inspection.

Microbat activity varies with weather, temperature, insect availability and breeding activity. Repeat surveys may be needed where works could affect a roost.

Habitat: Features to inspect

The Common Sheath-tailed Bat is associated with rocky landscapes and other places that provide secure roost cavities. On a works site, inspect both natural features and built structures that could provide equivalent shelter.

Prioritise caves, rock outcrops, overhangs, boulder piles, deep fissures and old mine workings. Inspect nearby vegetation and water features because these can support the insects used as prey.

Also check culverts, bridges and buildings where access to a dark cavity or roof space is available. These are general microbat roost features and are not all confirmed species-specific habitats.

  • Rocky gullies and escarpments
  • Cave entrances and roof voids
  • Old adits, shafts and mine chambers
  • Culverts, bridges and unused buildings
  • Vegetation over water and insect-rich edges

Habitat: Landscape context

Retain the connection between a roost and nearby feeding habitat where practicable. Clearing around a roost can increase light, noise, dust, heat and exposure to predators.

Assess the wider work area, not only the construction footprint. Bats may leave a roost to feed over bushes, water and other open insect-producing areas.

Foraging habitat: Foraging behaviour

The Common Sheath-tailed Bat hunts flying insects, mainly beetles. It commonly feeds over bushes and water and may use open corridors between roosts and feeding areas.

The species hunts alone and flies slowly in a straight line while following a grid pattern over the feeding ground. It catches insects in flight.

Activity may be concentrated around water, vegetation edges, drainage lines, open woodland and other places where flying insects gather.

  • Water bodies, dams and drainage lines
  • Bushland edges and open woodland
  • Vegetation overhanging water
  • Insect-rich areas near lights, while recognising that artificial light can also alter bat behaviour

Foraging habitat: Construction controls

Limit unnecessary night lighting near known or suspected roosts and feeding corridors. Direct lights away from cave entrances, rock fissures, water and retained vegetation.

Manage dust, noise, sediment and vegetation clearing so that feeding areas and access routes are not degraded during construction.

  • Use shielded, warm-spectrum lighting where lighting is required.
  • Retain suitable vegetation and waterway buffers required by the project approval.
  • Schedule high-disturbance works away from confirmed active roost entrances where practicable.

Breeding habitat: Breeding season

Species-specific information about breeding sites and reproduction is limited, but the Common Sheath-tailed Bat is treated as a colonial breeder. For project planning, any roost where young are raised must be managed as a breeding place.

Most microbats give birth to one pup each year in the warmer months, usually from spring to late summer. Timing can vary with region and local conditions.

A roost that appears quiet outside the breeding period may still be important at other times. Do not remove or exclude bats without an assessment of seasonal use.

Breeding habitat: Confirming a maternity roost

A maternity roost is confirmed by evidence such as pregnant or lactating females, dependent pups, or repeated observations of females carrying or attending young.

Use a combination of methods. These can include emergence watches, acoustic recording, harp trapping or mist netting by appropriately qualified personnel, and careful inspection of accessible roost features.

  • Plan surveys around the likely evening emergence period and suitable weather.
  • Use an endoscope or pole camera only where the feature can be inspected safely and without harming bats.
  • Stop work and seek ecological advice if pups or a concentration of breeding females is found.

Breeding habitat: Queensland approval context

In Queensland, the Common Sheath-tailed Bat is a least concern colonial breeder. Tampering with its breeding place requires a high risk species management program under the Nature Conservation (Animals) Regulation 2020.

This is different from the low risk program used for other least concern animals. Confirm the approval pathway with the Queensland Department of the Environment, Tourism, Science and Innovation before works affect a suspected breeding place.

Sheltering habitat: Known roost types

The species is known to roost in caves, old mines and cracks in rocks. As a microbat, it may also investigate other enclosed roost features, so all suitable cavities within the disturbance area should be assessed.

Look for bats in caves, old mines and rock fissures. The species may hang on rock surfaces during the night and retreat into nearby cracks when disturbed.

Individuals may roost in small groups, with bats usually hanging more than 50 centimetres apart. Do not assume that a low bat count means the feature has little value.

  • Caves and overhangs
  • Old mines and adits
  • Deep cracks and fissures in rocks
  • Rock faces with protected ledges

Sheltering habitat: Other microbat features

For project surveys, inspect tree hollows, loose bark, buildings, roof spaces, culverts and bridges as potential microbat features. These roost types are general guidance for the group and are not all confirmed roosts for this species.

Inspect hollow-bearing trees before clearing where they occur near suitable habitat. A roost may be hidden from the ground and may require an endoscope or pole camera assessment.

Sheltering habitat: Safe clearing and exclusion

Where a hollow-bearing tree must be removed, use a two-stage or soft-felling approach under an approved fauna management procedure. Retain the felled section where safe, and allow fauna to leave before processing it.

Do not seal, exclude or remove bats from a suspected maternity roost during the breeding period. Exclusion devices should be installed outside the maternity season, after confirming that young are not dependent and that the method will not trap bats inside.

  • Use a suitably experienced fauna spotter catcher.
  • Inspect cavities immediately before work.
  • Recheck exclusion devices and retained roost features.
  • Consider bat boxes as supplementary habitat only. They do not replace a natural roost or compensate automatically for a maternity roost.

Colonies and breeding places: What a colony or maternity roost looks like

Colonies and maternity roosts need special care because many bats can depend on one shared breeding place. The Common Sheath-tailed Bat is reported in small roosting groups, but the size of breeding colonies is not well documented for this species.

A colony may be a group of bats sharing a cave, mine, rock fissure or other enclosed roost. Bats may be visible on the roof or walls, or hidden deep in cracks and chambers.

A maternity roost is a breeding place where females give birth and raise young. It may contain pregnant or lactating females, pups and adults moving in and out at dusk.

  • Repeated evening emergence from one entrance
  • Several bats using the same cavity or rock feature
  • Pups or small non-flying bats inside the roost
  • Pregnant or lactating females identified during authorised survey
  • Fresh guano, urine staining, odour or persistent bat noise

Colonies and breeding places: Colony size and site fidelity

The species may roost in small groups, and individuals usually maintain space from one another. There is no reliable species-specific figure for typical breeding colony size.

Treat repeated use of a roost as evidence that the site has value. Site fidelity can vary among bats and seasons, so a single empty inspection should not be used to clear a roost for destruction.

Colonies and breeding places: Recognising an active breeding place

Use dusk emergence watches, acoustic monitoring and, where appropriate, harp traps or mist nets to establish whether a roost is active. Trapping must be undertaken by trained personnel under the relevant approvals.

Inspect accessible cavities with an endoscope or pole camera only when this can be done safely and without disturbing bats or pups. Combine observations across suitable survey periods.

  • Record the number and behaviour of bats at emergence.
  • Look for dependent young and females showing signs of pregnancy or lactation.
  • Map all entrances, cracks and connected roost features.
  • Suspend works if breeding evidence is detected and obtain project-specific ecological advice.

Colonies and breeding places: Why colonies need special care

Disturbance at one roost can affect many bats at once. Noise, vibration, lights, smoke, dust, sealing entrances or removing a roost feature can cause injury, abandonment or loss of a local breeding site.

Queensland transport guidance treats microbats as colonial breeders during the breeding season. Any roost where young are raised is a breeding place, regardless of whether the colony appears large.

Threats: Roost destruction

The main risks on development and land management sites are loss of roosts, disturbance to colonies and degradation of feeding habitat. Controls should protect both the roost feature and the surrounding landscape.

Mining, blasting, excavation, rock removal and sealing of caves or old mines can destroy roosts. Removing rock faces or filling cracks can remove the only shelter available in a local area.

Survey caves, mines, overhangs and fissures before ground disturbance. Establish exclusion zones and structural controls that are appropriate to the feature and project approval.

Threats: Disturbance at roosts

Visitors, machinery, vibration, lights, smoke and repeated entry can disturb roosting bats. Disturbance is especially risky when females are pregnant or young are dependent.

Control access to known roosts and keep workers away from entrances unless inspection is authorised and necessary.

  • Use low-impact inspection methods.
  • Avoid directing lights into entrances or fissures.
  • Maintain stable roost conditions during nearby works.
  • Use an incident response procedure for injured, trapped or displaced bats.

Threats: Clearing and habitat loss

Clearing can remove feeding habitat, water-edge vegetation and movement routes. Agricultural degradation and loss of bushland can reduce insect availability around roosts.

Retain suitable vegetation and water features where practicable, and control sediment, weeds, dust and runoff during construction.

Threats: Planning and compliance

The species is not listed as endangered, vulnerable or near threatened in Australia, but its colonial breeding behaviour still affects work methods and approvals. In Queensland, use the high risk species management program pathway where works may tamper with a breeding place.

Obtain the required permits, approvals and project-specific fauna management measures before clearing, exclusion, demolition or disturbance begins.

Survey methodology: 1. Desktop assessment

Common Sheath-tailed Bats can be difficult to detect because they roost in enclosed spaces and may leave after dark. Use more than one survey method where clearing or construction may affect a roost, colony or breeding place.

Map caves, old mines, rocky fissures, hollow-bearing trees, loose bark, culverts, bridges and buildings within and near the work area.

Check previous fauna records, local landholder observations, mine and cave information, and records of repeated bat use. Treat a repeatedly used site as potentially important, even where a colony has not been confirmed.

Identify nearby water, bushland and connected habitat used for feeding. Review planned lighting, vibration, blasting, tree removal and night works.

  • Obtain current project mapping and access information before field work.
  • Identify all structures and trees that could contain a roost or breeding place.
  • Plan surveys for the warmer months, usually spring to late summer, when microbats commonly raise young.

Survey methodology: 2. Acoustic and capture surveys

Use Anabat or similar detectors along likely flight paths, at water, near roost entrances and around structures. Record survey dates, start and finish times, detector locations, weather, habitat, call files and identification confidence.

Use harp traps or mist nets only under the appropriate authority and with trained personnel. Place them at likely flyways, roost exits or narrow access points, and release bats promptly after processing.

Survey effort should reflect the risk, habitat and access. Increase effort where there are repeated calls, visible bats, suitable roosts or proposed removal of hollow-bearing trees.

  • Avoid heavy rain and strong winds, and record conditions that may reduce bat activity.
  • Do not rely on one negative detector result to clear a suspected roost.
  • Record species, sex, reproductive condition where assessed, age class, capture location and any signs of injury.

Survey methodology: 3. Roost and emergence checks

Watch likely roost entrances from before sunset until bat activity has finished. Record emergence direction, approximate activity, repeated use and any return to the roost.

Inspect accessible trees, culverts, bridges, buildings, caves and mines from a safe position. Use an endoscope or pole camera for hollows and fissures where this can be done without entering or damaging the roost.

A maternity roost is confirmed by pregnant or lactating females, pups, or other direct evidence that young are being raised. A roost used by young is a breeding place.

  • Keep observers away from entrances and avoid shining lights into occupied roosts.
  • Use cave and mine safety procedures. Do not enter unstable or restricted workings.
  • Record roost type, entrance location, evidence of use, bat numbers where visible, photographs, microclimate observations and access constraints.

Survey methodology: 4. Interpreting results

The species is known to roost in caves, old mines and rock cracks, sometimes in small groups. Individuals may hang more than 50 centimetres apart, so a roost can appear sparsely occupied.

Microbats form colonies during the breeding season. A colony may be concentrated in one roost or use several nearby roosts. Avoid assuming that a quiet or apparently empty roost is unused.

There is limited species-specific information on breeding schedules, site fidelity and seasonal movement. Apply conservative microbat practice and seek specialist advice where the result is uncertain.

  • Classify each site as confirmed breeding place, confirmed roost, potential roost, or no evidence found.
  • Map the site and its likely flight paths, foraging habitat and nearby alternative roosts.
  • Escalate any evidence of a colony, pups or repeated use before disturbance proceeds.

Before habitat disturbance: 1. Avoidance and approvals

Plan works to avoid roosts and breeding places wherever possible. A colony can represent a large share of the local population, and disturbance can affect bats that cannot readily escape or relocate.

Redesign clearing, access tracks, lighting and structures to retain confirmed and potential roosts where practicable.

Obtain advice on whether the action requires an EPBC Act referral. Check all relevant Commonwealth, Queensland, Northern Territory or Western Australian requirements before fauna handling, tree removal, cave or mine disturbance, or construction begins.

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

  • Confirm the project approvals, fauna permits, scientific licences and fauna spotter catcher authorities in writing.
  • Engage the relevant state agency where a cave, mine, bridge, culvert, building or hollow-bearing tree may be a breeding place.
  • Keep approval conditions and the fauna management plan at the work face.

Before habitat disturbance: 2. Breeding-place assessment

Treat a roost where young are raised as an active breeding place. Look for pups, pregnant females, lactating females and repeated adult activity at the same site.

The species may use caves, old mines and rock fissures. Microbats may also use tree hollows, loose bark, culverts, bridges and buildings, so inspect these where they occur in the impact area.

Do not infer that a site is safe to disturb because only a few bats are visible. The species may roost in small groups with wide spacing between individuals.

  • Schedule a targeted pre-clearance inspection close to the planned disturbance.
  • Avoid disturbance during the maternity period unless the action is authorised and specialist advice confirms that the risk can be managed.
  • Where breeding status cannot be resolved, retain the site or delay works until an ecologist has assessed it.

Before habitat disturbance: 3. Buffers and exclusion

Set a site-specific no-go area around each confirmed or potential roost. The buffer must account for the roost entrance, flight path, vibration, noise, lighting, blasting, machinery movement and the risk of collapse or falling material.

Do not install exclusion devices on an active maternity roost. Exclusion is best undertaken outside the maternity season, under an approved method and with follow-up checks.

Use one-way exclusion devices only where the roost has been assessed, alternative habitat is available and the device will not trap pups or separate dependent young from adults.

  • Mark the buffer on plans and on the ground.
  • Fence or otherwise protect retained trees, rock faces, cave entrances, mine adits, culverts, bridges and buildings.
  • Remove temporary exclusion devices when the approved exclusion period ends and check that bats cannot re-enter unsafe areas.

Before habitat disturbance: 4. Tree and crew preparation

For hollow-bearing trees, use a two-stage or soft-felling method where authorised. First reduce the crown or limbs in a controlled way, then allow the tree or section to remain undisturbed before final removal where the method and risk assessment support this.

Use an endoscope or pole camera before works where a hollow can be inspected safely. Retain hollow sections and suitable roost features when they can be stored safely for habitat use.

Brief all workers and subcontractors on the species, mapped no-go areas, stop-work authority, night lighting controls, handling limits and reporting requirements.

  • Nominate the fauna spotter catcher and the person who can stop work.
  • Place contact details and the fauna response procedure in site vehicles and the site office.
  • Keep machinery, spoil, lighting and access routes outside roost buffers.

During habitat disturbance: 1. Sequential clearing

Clear in a controlled sequence and keep a qualified fauna spotter catcher present where required by the approval or management plan. Work must stop when conditions differ from the approved method or a bat, colony or breeding place is found.

Clear non-habitat areas first, then work towards retained habitat and approved release areas. Use slow, staged clearing so animals have an opportunity to leave without being driven into active work zones.

Inspect each tree, structure, rock feature and artificial roost immediately before disturbance. Recheck hollows, fissures, loose bark, culverts, bridges and buildings after the first disturbance stage.

Keep lighting directed away from retained roosts, vegetation corridors and water. Avoid unnecessary night work near known flight paths.

  • Use the approved two-stage or soft-felling method for hollow-bearing trees.
  • Pause between stages where the fauna management plan requires animals to leave.
  • Do not destroy a suspected roost entrance to force bats out.

During habitat disturbance: 2. Stop-work triggers

The fauna spotter catcher must have authority to stop work immediately. Stop for any bat, pup, active breeding place, colony, occupied roost, injured animal, unexpected hollow or unsafe condition.

Keep people, plant and vehicles away from the location while the site is assessed. Contact the project ecologist and approval holder before restarting.

If an active breeding place is found, retain the place, establish a site-specific exclusion area and obtain specialist and regulatory direction. Do not relocate pups or exclude adults without an approved method.

  • Record the exact location and condition of the finding.
  • Photograph the feature from a safe distance and avoid repeated approaches.
  • Restart only after the fauna spotter catcher and relevant approval authority have cleared the revised method.

During habitat disturbance: 3. Handling and animal care

Only authorised, trained personnel may handle bats. Use appropriate gloves, a secure capture bag and hygienic equipment, and minimise handling time.

Do not handle a bat unnecessarily. Never pick up a bat with bare hands, and do not attempt to disentangle or release an animal without the required authority and advice.

Place a healthy displaced bat in a suitable dark, quiet container for assessment and release or transfer in accordance with the approval and veterinary or wildlife advice.

  • Treat every bite or scratch as a potential exposure and follow the site health procedure immediately.
  • For an injured, weak, grounded or entangled bat, isolate the area and contact a licensed wildlife carer, veterinarian or relevant wildlife authority.
  • Do not release a bat into an unassessed active roost or breeding place.

During habitat disturbance: 4. Records and communication

Record all animals seen, handled, injured, released or transferred. Include species, location, date, time, habitat, condition, action taken, handler and final outcome.

Record all stop-work events, roost findings, colony observations, breeding evidence, exclusion devices, tree-felling stages and approval notifications.

Provide daily findings to the site supervisor and ecologist while high-risk habitat is being disturbed.

  • Maintain photographs, call files, trap records, inspection sheets and release details.
  • Update the site map when a roost or flight path is discovered.
  • Report incidents and non-compliance within the timeframe required by the approval or management plan.

After habitat disturbance: 1. Post-clearance checks

Complete a careful close-out inspection after each disturbance stage. Follow-up is needed to confirm that no bats, dependent young or trapped animals remain and that controls worked as planned.

Inspect felled trees, hollow sections, rock piles, culverts, bridges, buildings and work areas for remaining or injured bats. Check exclusion devices and barriers for signs of entrapment or attempted re-entry.

Repeat emergence observations or acoustic monitoring where a retained roost was close to the works or where activity changed during construction.

Keep the site under fauna controls until the project ecologist confirms that the approved stage is complete.

  • Search shaded ground, hollows and debris without entering unsafe structures.
  • Remove loose netting, open pipes and other hazards that could trap bats.
  • Document negative checks as well as animal findings.

After habitat disturbance: 2. Monitoring and relocated animals

Monitor retained roosts, replacement roost structures and nearby habitat where required by the approval or management plan. Use emergence watches, acoustic detectors and visual inspections suited to the site.

Track any relocated or rehabilitated animal according to the direction of the wildlife carer, veterinarian, ecologist or regulator. Do not assume that release alone confirms a successful outcome.

Review whether bats are still using retained or replacement roosts and whether construction lighting or noise is affecting access.

  • Record monitoring dates, weather, methods, effort, detector locations, bat activity and evidence of breeding.
  • Check replacement structures after installation and during the next suitable monitoring period.
  • Escalate repeated absence, injury, mortality or renewed roost disturbance.

After habitat disturbance: 3. Reporting and incident review

Prepare a close-out report that compares actual works with the approved method. Include survey results, roost and breeding-place findings, animal incidents, stop-work events, exclusions, releases and monitoring outcomes.

Review each incident with the supervisor, fauna spotter catcher, ecologist and contractor. Identify whether the problem arose from design, timing, induction, plant operation, lighting or communication.

Update the fauna management plan before the next work stage when controls were ineffective or new habitat was found.

  • Notify regulators and approval holders within required timeframes.
  • Retain records for the period required by the approval and project system.
  • Share practical lessons with the next work crew before work resumes.

Rehabilitation actions: 1. Restore habitat and flight paths

Rehabilitation should restore safe roosting, feeding and movement habitat rather than simply replace removed structures. Common Sheath-tailed Bats use caves, old mines and rock fissures, and other microbat roost types may suit a site where they are retained or purpose-built appropriately.

Retain and protect caves, mines, rock fissures, hollow-bearing trees, loose bark, mature vegetation, culverts, bridges and buildings that remain suitable and safe.

Revegetate cleared edges with locally appropriate native species and reconnect roosts with bushland and water where the project permits.

Remove spoil, waste and unstable material from retained roost entrances, but do not alter a cave, mine or fissure without specialist advice and approval.

  • Stabilise eroding ground without blocking roost entrances or flight paths.
  • Keep restoration works outside confirmed breeding places unless authorised.
  • Use low-disturbance access routes for future maintenance.

Rehabilitation actions: 2. Replacement roost structures

Use bat boxes, artificial roost structures or retained hollow sections only after an ecologist has confirmed that the design and location suit local microbats. These are supplementary measures, not an automatic replacement for a natural colony or maternity roost.

Place structures away from intense lighting, machinery vibration and regular human disturbance, with clear access for bats and safe maintenance access for workers.

Where nest boxes are proposed, confirm that the design is suitable for bats rather than birds. Do not install artificial nest sites as a substitute for a natural breeding place without approval.

  • Use materials and fixing methods that will not overheat, flood or collapse.
  • Install structures before works where the management plan requires bats to have alternative habitat.
  • Inspect structures for occupancy, damage, overheating, pests and water entry.

Rehabilitation actions: 3. Water, weeds and lighting

Protect nearby water and vegetated feeding habitat. Keep sediment, fuel, chemicals and concrete washout out of drainage lines and bat foraging areas.

Control weeds so native vegetation can regenerate and access to roosts is not obstructed. Use methods that avoid poisoning or trapping bats.

Use the lowest practical light levels, direct lights away from roosts and flight paths, and turn lights off when they are not needed.

  • Maintain clean, stable water points where they are part of the approved rehabilitation design.
  • Inspect drains, pipes and open tanks for entrapment hazards.
  • Keep lighting controls in the maintenance plan, not only in the construction plan.

Rehabilitation actions: 4. Long-term monitoring

Monitor retained and replacement roosts, nearby vegetation, water and flight paths over the period required by the approval. Combine emergence watches, acoustic monitoring and visual inspections where they answer different questions.

Look for continued roost use, breeding evidence, safe access, injuries, mortality and changes caused by lighting or new disturbance.

Use the results to repair, relocate or redesign supplementary structures only with ecological advice and the required approval.

  • Set clear monitoring triggers before handover.
  • Compare results with the pre-construction baseline where one exists.
  • Keep monitoring records with the site environmental file and report outcomes to the relevant approval holder or regulator.

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