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Yellow-lipped Cave Bat (Vespadelus douglasorum)

The Yellow-lipped Cave Bat is a poorly known, cave-roosting microbat of the Kimberley in Western Australia. It may forage over waterways and woodland on or near works sites, while colonies and maternity roosts need careful protection because disturbance at one roost can affect many bats. It is not listed as threatened in Australia, but it is a DBCA Priority 2 species in Western Australia and is treated as a colonial breeder for Queensland management purposes.

Conservation status

Breeding behaviour, All states and territories: Colonial breeder. Breeds in colonies or shared roosts, so one breeding place can hold a large share of the local population.

Breeding season

The Yellow-lipped Cave Bat is a poorly known colonial cave bat recorded in the Kimberley of Western Australia. As a general microbat pattern, breeding and pup rearing are most likely from spring to late summer, with some regional and year to year variation.

Breeding mode: Colonial breeder. Maternity groups form in shared roosts, and most Australian microbats give birth to one pup per year.

Litter size: Not recorded for the Yellow-lipped Cave Bat. One pup per year is the usual pattern for many Australian microbats.

Gestation: Not recorded.

Fledging and weaning: Not recorded. Dependent pups should be assumed to be present during the warmer breeding period until surveys confirm otherwise.

Breeding and roost sites: Recorded roosts are sandstone and limestone caves, usually near water. Caves, crevices, fissures, loose bark, tree hollows, culverts, bridges, mines and buildings can provide roosts for microbats generally, but these alternative sites are not confirmed breeding sites for this species.

Colony size and site fidelity: Colonies of up to 80 individuals have been recorded, and other records describe small colonies. Site fidelity is not recorded. Treat known caves and regularly used roosts as sensitive until surveys show they are inactive.

Recognising an active breeding place: Look for pregnant or lactating females, pups, repeated emergence activity, bats entering or leaving the same cavity, and concentrated acoustic records. Use emergence watches, Anabat or similar detectors, harp traps or mist nets where appropriate, and inspect tree hollows with an endoscope or pole camera if tree roosts are possible. Any roost where young are raised is a breeding place.

Timing may shift between years and regions, particularly with rainfall and local temperature, so check caves, hollow-bearing trees and other potential roosts before clearing and use staged or soft felling where occupied hollows may be present.

  • Breeding, births and maternity activity: Breeding and births are most likely in the warmer months, from spring to late summer.
  • Dependent pups: Dependent young may be present from late spring through summer, so roost disturbance can cause direct harm or separation.
  • Cave colonies and maternity roost use: Caves near water may be used throughout the year, with greater sensitivity expected when colonies contain pregnant females or pups.
  • Roost emergence and foraging activity: Adults may emerge to forage year round, including over riparian vegetation and nearby tropical woodland.
  • Highest clearing risk: The highest risk is from spring to late summer, when clearing or roost disturbance may affect maternity colonies, pups and occupied caves or cavities.

Identification: Appearance

The Yellow-lipped Cave Bat is a large species of Vespadelus. Field identification from a brief view is difficult, so acoustic identification and, where approved, close examination by an experienced bat ecologist are recommended.

Detailed diagnostic features and measurements are not available for this species. Treat any large Vespadelus recorded near suitable cave or riparian habitat as requiring confirmation by a suitably experienced person.

Group: Microbat, family Vespertilionidae

Recorded description: Large species of Vespadelus

Identification: Calls and similar species

The species uses ultrasonic echolocation calls that are not audible to most people. Calls can overlap with those of other Vespadelus and other small to medium microbats, so call analysis should be completed by a person familiar with regional bat calls.

No reliable similar-species field characters are set out here. Do not identify the species from one call, one photograph or a brief flight view alone.

  • Use an Anabat or similar ultrasonic detector for initial detection.
  • Retain original recordings, site coordinates, date, time and detector settings for later review.

Identification: Field signs

Bats may leave droppings below a roost entrance, on cave ledges or on structures below a roost. Droppings alone do not confirm this species.

Look for bat odour, staining, concentrated insect remains, repeated flight activity and audible social calls around a roost. Bats do not build nests, and whitewash is not normally a useful bat sign.

  • Guano pellets or loose piles below cracks, cave entrances or ledges.
  • Fresh staining or polished surfaces around frequently used crevices.
  • Repeated emergence or return flights at dusk.
  • Disturbed bats, pups or adult females inside a roost.

Distribution: Australian range

In Australia, the Yellow-lipped Cave Bat is restricted to the Kimberley region of Western Australia. It is most commonly recorded in the western Kimberley, particularly in areas receiving more than 800 mm of annual rainfall.

Records and habitat descriptions place the species in the Kimberley, including areas around the Fitzroy River and its tributaries. It is widespread within its Kimberley range, but very little is known about its abundance and local movements.

  • Western Kimberley and other parts of the Kimberley region.
  • Western Australia is the mapped Australian state for this profile.
  • No overseas range is recognised for this species.

Distribution: What a site record means

An acoustic record may indicate a bat flying through or foraging over a site. It does not by itself show that a maternity roost or other day roost is present.

Records near caves, breakaways, scree slopes, waterways or riparian vegetation should trigger a more careful roost assessment before clearing or blasting.

  • Map all records against caves, rocky landforms, drainage lines, riparian vegetation and proposed clearing.
  • Share records with the project ecologist and fauna spotter catcher before work starts.

Habitat: Vegetation and landscape

The species is associated with wet Kimberley landscapes, waterways and rocky landforms. On a work site, focus the initial assessment on watercourses, cave-bearing breakaways and areas with sandstone or limestone fissures.

Recorded habitat includes Melaleuca-lined waterways, Pandanus-lined waterways and adjacent tropical woodlands. Riparian areas may be used for foraging even when the roost is outside the project footprint.

  • Melaleuca and Pandanus along drainage lines and river margins.
  • Adjacent open or tropical woodland.
  • Ridgeline breakaways, scree slopes and rocky outcrops.
  • Sandstone or limestone country with caves and crevices.

Habitat: Site checks before clearing

Walk the proposed clearing boundary and nearby access areas before machinery arrives. Check rock faces, overhangs, culverts, bridges, buildings and other structures for cracks, cave entrances and bat activity.

Where a tree, rock face or structure could contain a roost, mark it on the clearing plan and obtain ecological advice before disturbance.

  • Inspect drainage lines and riparian vegetation for flight paths and feeding activity.
  • Identify caves and crevices, including small entrances partly hidden by vegetation or scree.
  • Keep plant, spoil and blasting activities away from suspected roost entrances until assessed.

Foraging habitat: Features to look for

The Yellow-lipped Cave Bat has been recorded foraging around Melaleuca and Pandanus waterways and adjacent tropical woodland. It may also pass through cleared or modified areas while moving between a roost and feeding habitat.

Foraging habitat includes open air space over water, woodland edges and vegetation corridors. Riparian habitat can remain valuable even where no cave occurs within the development envelope.

  • Waterways lined with Melaleuca or Pandanus.
  • River margins, drainage lines and pools.
  • Open woodland beside rocky country or riparian vegetation.
  • Gaps and edges that provide unobstructed flight space.

Foraging habitat: Acoustic survey

Use ultrasonic detectors to identify bat activity and possible flight routes. A recording is best treated as evidence of use of the airspace unless a roost is confirmed separately.

Survey design should reflect the project risk, season, nearby caves and the need to compare activity before and during works. A bat ecologist should review uncertain calls.

  • Place detectors near waterways, cave-bearing landforms and proposed clearing.
  • Record the weather, detector location, survey period and nearby lighting or machinery.
  • Avoid relying on a single night or a single detector where a maternity roost could be affected.

Breeding habitat: Maternity habitat

Breeding and roosting are associated with caves in the available Kimberley records, especially limestone caves and caves in sandstone country. Species-specific breeding dates are not well documented, so use the general microbat breeding season as a risk guide and confirm conditions locally.

A maternity roost is a place where females gather to give birth and raise young. For this species, caves and cave-like fissures near water are the main features to investigate.

Other microbats can use tree hollows, loose bark, fissures, mines, culverts, bridges and buildings. These features should also be checked where the project may affect a mixed bat community.

  • Limestone or sandstone caves and deep crevices.
  • Warm, sheltered cave chambers with suitable ledges or cracks.
  • Nearby water and connected flight paths.
  • Structures or trees with cavities, where other colonial microbats may occur.

Breeding habitat: How to confirm breeding

A maternity roost is confirmed by finding pregnant or lactating females, pups or dependent young, or by consistent evidence of adults carrying out repeated roost entry and emergence. Do not enter or handle bats without the necessary approvals and specialist supervision.

Acoustic monitoring, emergence watches and carefully planned inspection can help. Harp traps or mist nets should only be used by trained and authorised bat personnel, with animal welfare controls.

  • Look for pregnant or lactating females during approved trapping or examination.
  • Look for pups, juvenile bats or dependent young, without touching the roost contents.
  • Use emergence counts and repeated observations to assess occupancy.
  • Use an endoscope or pole camera only where it can be done safely and without blocking the roost.

Breeding habitat: Seasonal work planning

Most microbats give birth to one pup a year in the warmer months, usually from spring to late summer. Avoid exclusion, demolition, felling or major disturbance at a suspected maternity roost during this period unless a bat ecologist and the relevant regulator have approved the approach.

Where a hollow-bearing tree must be removed for another bat species, use two-stage or soft felling under ecological supervision. Install exclusion devices outside the maternity season and only after confirming that dependent young are absent.

  • Plan surveys early enough to change the clearing footprint.
  • Stop work if pups, lactating females or a previously unknown roost are found.
  • Use a staged response, including isolation, assessment and approved management.

Sheltering habitat: Known roost features

The species is known to roost in sandstone and limestone caves, typically near water. Kimberley breakaways and scree slopes may contain suitable cracks and caves even when an entrance is not obvious from a vehicle or aerial image.

Look for caves, fissures, overhangs and deep cracks in sandstone and limestone. Small entrances can lead to larger chambers, so do not assume that a narrow opening is unused.

Nearby riparian vegetation and water may indicate a useful roosting and foraging landscape.

  • Sandstone caves and rocky breakaways.
  • Limestone caves and cavities.
  • Crevices in scree slopes and ridgelines.
  • Caves near rivers, drainage lines or pools.

Sheltering habitat: Other microbat shelter

As a group, microbats may shelter in tree hollows, loose bark, rock fissures, caves, disused mines, culverts, bridges and buildings. These are general microbat possibilities and should not be treated as confirmed Yellow-lipped Cave Bat roosts without evidence.

Inspect structures before demolition, repair, lighting installation or sealing. Check hollow-bearing trees before felling and retain them where practicable.

  • Use an endoscope or pole camera for suitable hollows and cavities.
  • Inspect culverts, bridge joints and building roof spaces before works.
  • Keep roost entrances clear of spoil, dust, bright lighting and machinery vibration.

Sheltering habitat: Managing a suspected roost

If bats are present, establish a quiet area and obtain advice before entering, sealing or disturbing the feature. Exclusion devices can be used only when the roost is not supporting dependent young and the method has been designed for the site.

Bat boxes may provide supplementary shelter for some microbats, but they are not a replacement for a natural cave, hollow or maternity roost.

  • Do not seal a roost while bats may be inside.
  • Use soft lighting and limit night work near an active roost.
  • Retain natural roost features wherever the project design allows.
  • Monitor any approved exclusion or replacement measure after installation.

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

The Yellow-lipped Cave Bat roosts in colonies, with records of up to 80 individuals and other descriptions of small colonies. A single cave or maternity roost can therefore hold a substantial share of the bats using a local area and needs more care than an isolated casual roost.

A colony may occupy a cave chamber, ledge or group of cracks. At dusk, bats may emerge in a steady stream or in several bursts, then return to the same entrance later in the night or before dawn.

A maternity roost may contain adult females and pups in a warm, sheltered section of the cave. It may be quiet and difficult to detect during the day.

Recorded colony size: Up to 80 individuals

Site fidelity: Treat a used cave as potentially important across seasons. Bats may return to suitable roosts, so one vacant daytime inspection does not prove that a site is abandoned.

  • Several bats emerging from one cave entrance.
  • Guano concentrated below a ledge or crack.
  • Repeated dusk and dawn activity at the same feature.
  • Social calls, odour or staining around an occupied roost.

Colonies and breeding places: Recognising an active breeding place

Use an emergence watch at dusk, repeated acoustic monitoring and, where safe, an internal inspection to assess activity. The strongest confirmation is evidence of pregnant or lactating females, pups or dependent young.

A cave that appears empty during a daytime visit may still be occupied at night. Survey timing should account for weather, temperature, rainfall and disturbance from nearby works.

  • Conduct emergence watches from a position that does not block the entrance.
  • Use Anabat or similar detectors to document activity and flight direction.
  • Use approved harp trapping or mist netting only under trained supervision.
  • Stop and reassess if young bats or lactating females are detected.

Colonies and breeding places: Why colonies need special care

Disturbing a colony can cause repeated flight, abandonment, injury or separation of young from females. Noise, vibration, dust, bright lights, blasting, cave entry and sealing can all affect a roost.

Queensland transport guidance treats microbats as colonial breeders during the breeding season. A place where young are raised is a breeding place. In Queensland, tampering with the breeding place of a least concern colonial breeder requires the higher risk species management program pathway rather than the low risk pathway used for other least concern animals.

  • Plan work around confirmed or suspected maternity roosts.
  • Use buffers and access controls set by the project ecologist and regulator.
  • Do not rely on the species being listed as least concern to justify disturbance.
  • Keep records of surveys, exclusions, incidents and follow-up monitoring.

Colonies and breeding places: Practical controls around colonies

Retain the cave, entrance and surrounding flight paths wherever possible. If a hollow-bearing tree or structure used by bats must be removed, use staged or soft removal under supervision and provide a clear escape route.

Exclusion devices should be installed outside the maternity season, after confirming that no dependent young remain. Bat boxes can supplement retained habitat but should not be used to justify removing a confirmed maternity roost.

  • Fence or mark the exclusion area before clearing begins.
  • Use two-stage or soft felling for suitable hollow-bearing trees.
  • Inspect cavities with an endoscope or pole camera where safe.
  • Have a stop-work procedure for bats, pups or an unexpected roost.

Threats: Loss of caves and rocky shelter

The main work-site risks are loss or disturbance of roosts, damage to riparian foraging habitat and poorly timed exclusion or demolition. The species is poorly known, so conservative decisions are appropriate when a cave or colony cannot be ruled out.

Excavation, quarrying, road formation, blasting, dumping and altered drainage can remove or damage caves, fissures, breakaways and scree slopes. A small entrance may connect to a larger roost and should be assessed before disturbance.

  • Map and retain sandstone and limestone caves and crevices.
  • Keep spoil, concrete, fill and sediment away from cave entrances.
  • Assess vibration and blasting effects where works are near a roost.

Threats: Disturbance at roosts

Night lighting, machinery, vibration, dust, smoke, cave entry and repeated vehicle movement can disrupt emergence and return flights. Disturbance during the maternity season carries a higher risk because young may be unable to leave or survive without their mothers.

  • Restrict night lighting near active roost entrances.
  • Use quiet work methods and maintain an agreed exclusion area.
  • Stop work and seek advice if bats are flushed from a cave or structure.

Threats: Clearing riparian and woodland habitat

Clearing Melaleuca or Pandanus waterways and adjacent woodland can reduce feeding habitat and movement corridors. Even where no roost occurs inside the development envelope, bats may use the area while commuting between caves and water.

  • Avoid drainage-line and riparian clearing where practicable.
  • Retain connected vegetation beside waterways.
  • Prevent sediment, fuel and concrete from entering waterways.
  • Keep access tracks and laydown areas out of cave approaches and riparian corridors.

Threats: Poorly planned exclusion or tree removal

Sealing a cavity or felling a hollow-bearing tree without checking for bats can trap adults or separate mothers from young. Exclusion and removal need a survey, suitable timing, a safe escape route and follow-up monitoring.

Use bat boxes only as supplementary habitat. They do not replace a natural maternity roost or remove the need to retain caves, hollows and other established shelter.

  • Confirm that no dependent young are present before exclusion.
  • Use two-stage or soft felling where a hollow-bearing tree must be removed.
  • Have a qualified fauna handler present for high-risk clearing.
  • Record and report injured, trapped or displaced bats promptly.

Survey methodology: 1. Desktop assessment

The Yellow-lipped Cave Bat is poorly known, but records show that it uses sandstone and limestone caves, usually near water, and may occur in small colonies or colonies of up to 80 animals. Survey effort should focus on caves, crevices, drainage lines, riparian vegetation and other structures that could provide roosting habitat.

Review habitat mapping, recent fauna records, aerial imagery and landform information before entering the site.

Map caves, breakaways, scree slopes, limestone and sandstone formations, drainage lines, riparian vegetation, bridges, culverts, buildings and hollow-bearing trees.

Treat any cave or crevice near water as a potential roost until a suitably qualified ecologist has assessed it.

Known roost habitat: Sandstone and limestone caves, typically near water

Recorded colony size: Small colonies, with colonies of up to 80 individuals recorded

Foraging habitat: Melaleuca-lined and Pandanus-lined waterways, riparian areas and adjacent tropical woodland

  • Check whether the action may require an EPBC Act referral, even though the Yellow-lipped Cave Bat is not listed as threatened under the EPBC Act.
  • Check current Western Australian DBCA status and obtain any required state permits or approvals before handling bats, entering restricted caves or disturbing fauna habitat.
  • For Queensland work, confirm whether the activity affects a breeding place and whether a high risk species management program is required for this colonial breeder.

Survey methodology: 2. Acoustic and capture surveys

Use Anabat or comparable ultrasonic detectors at likely flyways, waterways, cave entrances and edges of suitable woodland.

Deploy detectors during suitable weather, with low wind and little rain, and sample the periods when bats are expected to emerge and forage after dusk.

Use harp traps or mist nets only under an approved method and with suitably experienced personnel. Place equipment near likely flight paths and release bats promptly after identification and processing.

Useful methods: Ultrasonic recording, emergence watches, harp traps and mist nets

Survey conditions: Warm, dry and low-wind nights are generally most suitable for bat activity surveys

  • Have bat calls analysed by a person experienced with Vespadelus calls. Treat acoustic identifications as records requiring appropriate confidence levels.
  • Use capture methods only where they add value and can be conducted safely. Do not net directly across a cave entrance unless the method has been assessed and approved.
  • Repeat surveys where access, weather or season limits confidence. For microbats, include the warmer breeding period, generally spring to late summer, when a maternity roost may be occupied.

Survey methodology: 3. Roost and maternity surveys

Complete an emergence watch at suspected caves, culverts, bridges, buildings and other roost structures. Start before sunset and continue through the main emergence period selected by the ecologist.

Inspect accessible hollows, fissures, loose bark and structures with an endoscope or pole camera. Do not enter a cave or disturb a roost without the required permissions and a safe work method.

Confirm a maternity roost through direct evidence such as pregnant or lactating females, pups, dependent young, repeated use by females or repeated emergence of young.

Maternity roost evidence: Pregnant or lactating females and pups are strong confirmation

Potential roost features: Caves, fissures, loose bark, tree hollows, culverts, bridges and buildings

  • Look for guano, urine staining, rub marks, audible bat activity, bats in crevices and repeated use of the same entrance.
  • Keep inspection time short and avoid shining lights directly at bats for prolonged periods.
  • Assume that a roost where young are raised is a breeding place, even if the species is not seen during a single inspection.

Survey methodology: 4. Survey records and interpretation

Record the date, start and finish times, weather, detector locations, detector settings, surveyors, habitat, cave or structure condition and any access limitations.

Keep copies of call files, spectrograms, photographs, capture records, release locations and roost inspection notes.

Map every detection and potential roost using a consistent coordinate system. Record whether the observation was acoustic, visual, captured or confirmed by direct roost inspection.

  • Record sex, reproductive condition, age class, species confidence and any signs of injury for captured bats.
  • Document whether a site is a possible roost, occupied roost, maternity roost or confirmed breeding place.
  • Use the results to define no-go areas, work timing, exclusion requirements and the level of fauna supervision needed.

Before habitat disturbance: 1. Colonies and breeding places

Plan clearing around the risk of disturbing a colony or maternity roost. A single cave or structure can support a substantial share of the local population, and microbats may use a site communally during the breeding season.

A colony or maternity roost may be a cave, crevice, hollow, bridge, culvert, building or other sheltered structure where bats rest and females raise young. For this species, caves in sandstone or limestone near water are the strongest known roost indicators.

Treat a site as an active breeding place when pregnant or lactating females, pups, dependent young, repeated female use or other clear evidence of young being raised is found.

Expect colony size to vary. The species has been recorded in small colonies and in colonies of up to 80 individuals. Site fidelity is not well documented, so do not assume that an apparently empty roost is unused.

Why colonies need special care: Disturbance can affect many animals at once, including dependent young, and may cause abandonment or injury

Queensland classification: Microbats are treated as colonial breeders during the breeding season, and a roost where young are raised is a breeding place

  • Mark confirmed and potential breeding places on the construction plan.
  • Establish a site-specific no-entry and no-disturbance area around each active roost, based on advice from the fauna ecologist and the behaviour of the colony.
  • Do not block entrances, illuminate roost openings, alter drainage into a cave or place plant and spoil near a roost.
  • In Queensland, obtain the required high risk species management program before tampering with the breeding place of this least concern colonial breeder.

Before habitat disturbance: 2. Approvals, permits and timing

Confirm approval requirements before clearing, demolition, cave entry, roost exclusion or bat capture. Use the current requirements for the state or territory where the work occurs.

Consider an EPBC Act referral where the action could affect a protected matter or trigger a significant impact. Confirm the current state conservation listing, even where the species is not nationally threatened.

Schedule high-risk work outside the maternity period where practicable. For microbats, most births occur in the warmer months, generally spring to late summer. Do not exclude bats from a suspected maternity roost until occupancy and breeding status have been assessed.

  • Obtain any required Western Australian DBCA permits for fauna handling, disturbance, cave access or work near listed habitat.
  • For Queensland projects, obtain the applicable species management program before disturbing a breeding place. Use the high risk program pathway for this colonial breeder, not the low risk pathway for other least concern animals.
  • Document the approval conditions in the construction environmental management plan and brief supervisors before mobilisation.

Before habitat disturbance: 3. Pre-clearance inspection and exclusion

Complete a final pre-clearance inspection shortly before work begins. Inspect caves, crevices, hollow-bearing trees, loose bark, culverts, bridges, buildings and other structures that will be disturbed.

Use an emergence watch, acoustic detector and internal inspection where safe and authorised. A single daytime inspection is not enough to rule out use.

Use exclusion devices only where a qualified bat ecologist confirms that no dependent young are present and that exclusion will not trap bats inside.

  • Use one-way devices that allow bats to leave but not return, where the structure and risk assessment support that method.
  • Install and monitor exclusions outside the maternity season and remove them after the site is confirmed clear.
  • Use soft felling or two-stage felling for hollow-bearing trees. First lower or section the tree carefully where practicable, then inspect the hollow before final removal.
  • Do not fell a tree containing bats, pups or an active maternity roost until the ecologist has approved the method.

Before habitat disturbance: 4. Crew induction and work controls

Induct all workers, machine operators and subcontractors before entering the work area. Show photographs or maps of no-go areas and potential roosts.

Explain that only authorised and trained fauna personnel may handle bats. Workers must stop and report any bat, pup, colony, guano accumulation or roost entrance discovered during work.

Provide contact details for the fauna spotter catcher, project ecologist, site supervisor and wildlife carer or veterinarian.

  • Use physical barriers and signs around roosts and exclusion zones.
  • Keep lighting away from cave, culvert and bridge entrances. Use the lowest practical light level and shield lights from the roost opening.
  • Check that plant, temporary fencing, spoil, dust, vibration and drainage changes will not affect a roost.
  • Give the spotter catcher authority to stop work where fauna, a breeding place or an unexpected roost is found.

During habitat disturbance: 1. Sequential clearing and supervision

Clear in a controlled sequence, beginning with low-risk areas and leaving fauna routes open. Work should stop whenever a bat, colony, active breeding place or unexpected roost is found.

Clear non-habitat areas first, then work towards areas with potential roost features under direct fauna supervision.

Use staged clearing so bats and other fauna have time to move away from the work front. Retain connected vegetation and avoid driving plant through riparian corridors where practicable.

Use soft felling or two-stage felling for hollow-bearing trees and inspect each section before it is moved or chipped.

  • Keep machinery outside mapped exclusion zones unless the approved method allows entry.
  • Have the fauna spotter catcher walk the clearing edge and inspect cavities, bark, debris and structures as work progresses.
  • Stop clearing if visibility, dust, weather, noise or machinery position prevents effective fauna supervision.
  • Do not use smoke, water, chemicals, loud noise or physical prodding to remove bats.

During habitat disturbance: 2. If a bat, colony or breeding place is found

Stop work immediately and establish a quiet exclusion area. Move workers and machinery away from the roost entrance or animal.

Contact the fauna spotter catcher and project ecologist. Do not resume until the site has been inspected and the revised method has been approved.

If an active breeding place is found, retain the place and its access unless a lawful, approved management program specifically authorises disturbance.

  • Do not seal, relocate, illuminate or otherwise tamper with a roost while bats or dependent young may be inside.
  • Record the number of bats where this can be done without disturbance. Record evidence of pups, females, guano, calls, emergence and the condition of the roost.
  • Use a qualified bat ecologist to decide whether work can proceed, needs a buffer, must be rescheduled or requires a formal management response.
  • In Queensland, follow the conditions of the approved high risk species management program.

During habitat disturbance: 3. Handling and release

Handle bats only when necessary, and only by authorised people using appropriate personal protective equipment and current rabies and Australian bat lyssavirus safety procedures.

Place a captured bat in a clean, secure, breathable holding container. Keep it shaded, quiet and at a suitable temperature, and minimise holding time.

Release a healthy bat at the capture location or another location approved by the fauna ecologist. Do not move bats long distances without a specific ecological and animal welfare basis.

  • Never handle a bat with bare hands.
  • Do not release a pup that cannot fly. Keep it with the mother where safe, or follow the wildlife carer or veterinarian pathway.
  • Record the species, sex, age class, reproductive condition, capture location, release location, time held and condition at release.
  • Seek veterinary or wildlife carer advice for grounded, injured, cold, weak or entangled bats.

During habitat disturbance: 4. Injured animals and incident records

Treat every injured bat as a potential Australian bat lyssavirus exposure risk. Isolate the animal, prevent public access and contact the approved wildlife carer, veterinarian and project incident contact.

If a person is bitten, scratched or exposed to bat saliva, wash the area thoroughly and seek urgent medical advice. Report the exposure through the project safety system.

Record all stop-work events, animals found, roosts affected, handling, injuries, releases, mortalities and approvals.

  • Photograph the site and roost only where this can be done without increasing disturbance.
  • Record the machine, activity, time, location, weather and people involved in any incident.
  • Notify the relevant regulator or approval holder where required by the permit, management program or environmental incident procedure.
  • Do not restart work until the spotter catcher and supervisor have documented the control measures.

After habitat disturbance: 1. Post-clearance checks

Complete a careful check after clearing and after any roost intervention. Follow-up is especially useful where a roost was excluded, a tree was felled, or a colony was detected during works.

Inspect the cleared area, retained trees, cave entrances, culverts, bridges and exclusion devices after work. Look for trapped bats, fallen animals, exposed hollows, damaged roost entrances and new hazards.

Use acoustic monitoring or an emergence watch where a potential roost was disturbed or where the ecologist considers occupancy uncertain.

Confirm that no spoil, fencing, lighting, drainage change or construction material has blocked access to retained roosts.

  • Check soft-felled tree sections before they are removed, chipped or burnt.
  • Search beneath work areas and around tree bases for injured or grounded bats, without putting hands into hollows or crevices.
  • Keep post-work controls in place until the ecologist confirms that the site is stable and safe.

After habitat disturbance: 2. Monitoring and relocated animals

Monitor any approved exclusion or relocation site for continued use, abandonment, trapped bats and signs of breeding. Set the duration and method according to the roost risk and approval conditions.

Check bat boxes or artificial roost structures after installation and during suitable activity periods. A box should not be treated as a replacement for a natural cave or a confirmed maternity roost.

Track released or relocated animals only where a lawful and scientifically justified program has been approved.

  • Record emergence counts, acoustic activity, occupancy signs, reproductive evidence and structural condition.
  • If bats return to an excluded structure, stop nearby work and seek advice before adjusting the exclusion.
  • Report unsuccessful relocation, mortality, repeated roost abandonment or unexpected breeding activity to the project ecologist and relevant regulator.

After habitat disturbance: 3. Reporting and compliance

Prepare a close-out report that links each fauna record and incident to the relevant approval, map and work area.

Include survey methods, dates, weather, effort, call files, roost inspections, exclusion dates, handling records, outcomes and photographs.

Provide the report to the approval holder and regulators where required. Store records so they can inform later maintenance, clearing or construction stages.

  • Map retained roosts, exclusion zones, replacement structures and monitoring points.
  • List all departures from the approved method and the corrective action taken.
  • Record whether breeding evidence was found and whether any work occurred near an active breeding place.
  • Review the report with the site supervisor before demobilisation.

After habitat disturbance: 4. Incident review and adaptive management

Review every bat incident with the fauna ecologist, spotter catcher and construction supervisor. Identify whether the failure arose from survey limits, induction, plant movement, lighting, timing or unclear authority to stop work.

Update the clearing sequence, exclusion method, maps and induction materials before the next work stage.

Use the review to improve controls for other caves, hollow-bearing trees, culverts, bridges and buildings on the project.

  • Keep a register of lessons learned and actions closed out.
  • Repeat the risk assessment if the design, work footprint, season or construction method changes.
  • Escalate recurring roost disturbance or mortality to the project manager and relevant regulator.

Rehabilitation actions: 1. Restore habitat and water features

Rehabilitation should restore sheltered roosting areas, riparian vegetation and safe movement routes. Natural caves and crevices remain the preferred roost resource for the Yellow-lipped Cave Bat, so artificial structures are supplementary rather than a substitute for retained habitat.

Reinstate native riparian vegetation along waterways and protect retained Melaleuca, Pandanus and adjacent woodland where practicable.

Stabilise disturbed ground without sealing natural crevices or changing drainage into caves and rocky breakaways.

Maintain clean, unobstructed movement routes between roosting areas, waterways and foraging habitat.

  • Use locally appropriate native species and local provenance where available.
  • Control erosion and sediment before it reaches waterways or cave entrances.
  • Retain natural rocks, fallen timber, loose bark and hollow-bearing trees where they do not create a safety risk.
  • Prevent vehicles and plant from entering rehabilitated riparian areas.

Rehabilitation actions: 2. Bat boxes and artificial roosts

Use bat boxes, artificial crevices or other roost structures only where a bat ecologist confirms that the local habitat and species are suitable. They may provide supplementary shelter but will not replace a lost cave or maternity roost.

Place structures away from intense lighting, vibration and regular human disturbance. Select designs, orientation and placement for the local climate and target bat group.

Inspect structures after installation for damage, overheating, water ingress, occupation and signs of breeding.

  • Install structures before disturbance where practicable, so bats have time to investigate them.
  • Do not install a box inside an active roost or use it to justify destruction of a natural breeding place.
  • Use several suitable structure types only where the ecologist identifies a range of roosting needs.
  • Record installation coordinates, design, materials, mounting height and inspection results.

Rehabilitation actions: 3. Weeds, lighting and site use

Control weeds without contaminating waterways or cave entrances. Protect regenerating riparian vegetation from grazing, vehicles and repeated soil disturbance.

Design permanent and temporary lighting to avoid shining into caves, crevices, culverts, bridges and likely flight paths.

Manage noise, dust and vibration near retained roosts, particularly during the warmer breeding period.

  • Use shielded, downward-facing lights and the lowest practical intensity.
  • Switch off unnecessary lights when work is complete.
  • Keep chemicals, fuel, waste and spoil away from waterways and roost entrances.
  • Inspect rehabilitated areas after heavy rain and repair erosion promptly.

Rehabilitation actions: 4. Long-term monitoring

Monitor vegetation establishment, erosion, water condition, roost access and use of artificial structures for a period set by the approval and rehabilitation plan.

Use acoustic detectors, emergence watches and direct inspections where safe and authorised. Compare results with the baseline survey rather than relying on a single observation.

Continue monitoring if a colony, maternity roost or injured animal was recorded during construction.

  • Record bat activity, occupancy, breeding evidence, structure condition and surrounding habitat condition.
  • Remove failed or unsafe artificial structures after ecological advice and approval.
  • Use monitoring results to adjust weed control, lighting, water management, access restrictions and future maintenance methods.
  • Retain the monitoring dataset with the project environmental records.

Sources