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Oakview leaf-tailed gecko (Phyllurus kabikabi)

The Oakview leaf-tailed gecko is a small, nocturnal, arboreal gecko known only from rocky Araucarian vine forest at Oakview near Kilkivan in south-east Queensland. It matters on development sites because its habitat is highly restricted, fragmented and dependent on deep layers of broken igneous rock, with shelter spaces that can be damaged by clearing, fire, machinery, weeds and pest animals.

Conservation status

Commonwealth, EPBC Act 1999: Critically endangered.

Queensland, Nature Conservation Act 1992: Critically endangered.

Breeding season

Oakview leaf-tailed geckos are nocturnal and may be active throughout the year. Breeding is expected mainly from September to November, so clearing during spring may affect females carrying eggs, eggs in rock crevices and other sheltering geckos.

Reproductive mode: Egg laying.

Clutch size: Two eggs are typical for Phyllurus species. The Oakview leaf-tailed gecko holotype had two oviducal eggs, but a completed clutch has not been recorded.

Incubation: Not recorded for this species. Other Phyllurus species are reported to hatch after 65 to 90 days in captive care.

Size at hatching: Not recorded.

Age at maturity: Not recorded for this species. Phyllurus species are reported to reach reproductive size at about 2 to 3 years.

Nest or egg sites: Species-specific nest sites are not recorded. Protected rock crevices, interstitial spaces and hollows are potential sites, and communal laying in crevices is reported for other Phyllurus species.

Breeding frequency: Not recorded for this species.

Confirm timing locally before works, particularly where rainfall and temperature may influence breeding, egg laying, incubation and night activity.

  • Mating: Mating has not been recorded for this species. Other Phyllurus geckos mate at night, with breeding more pronounced in spring, September to November.
  • Gravid females: A female collected in late September had two oviducal eggs visible through the body wall. Females may therefore carry eggs during September to November, but the duration is not recorded.
  • Egg laying: Egg laying is likely in October and November. The late September female record indicates that laying may begin around September, and other Phyllurus species typically lay two eggs in October to November.
  • Incubation: Incubation length is unknown for this species. Applying the reported 65 to 90 day period for other Phyllurus species to October and November laying gives a possible emergence period from December to February, but this timing is not confirmed in the wild.
  • Hatchlings: Hatching and juvenile emergence have not been recorded for this species. Based on the 65 to 90 day incubation period reported for other Phyllurus species and October to November laying, hatchlings may occur from December to February.
  • Active period: The species is nocturnal and has been found at night on rocks or vegetation above rock. Available documents indicate night activity throughout the year and do not identify a monthly peak.
  • Highest clearing risk: Risk is highest from September to November, when females may contain eggs and egg laying is most likely. Clearing, vibration or rock movement can also destroy the boulders, hollows and deep broken-rock spaces used for shelter and potential egg sites.

Identification

This is a small, heavily tuberculate leaf-tailed gecko with a cylindrical tail and cryptic grey-brown colouring. Identification during fauna work is most reliable from a close view or photograph, particularly of the rostral scale and the underside of the hindlimb.

Adults grow to about 15 cm total length, with a snout to vent length of up to 8 cm. The type series measured 52.01 to 81.10 mm snout to vent length.

The body is grey-brown or fawn to mid-brown, with fine dark mottling or irregular blotches, pale spots and small to moderate conical tubercles. The original tail is narrow, cylindrical and tapering, with five or six pale cross-bands and enlarged spinose tubercles. A regenerated tail is granular, lacks the original tubercles and normally lacks the pale bands.

Weight has not been reported in the supplied documents. No reliable external differences between males and females are provided.

Snout to vent length: 52.01 to 81.10 mm in the type series

Total length: Up to about 15 cm

Original tail: Cylindrical, tapering, with five or six pale bands

Weight: Not reported

Identification: Separating similar geckos

The species may be confused with Phyllurus gulbaru, P. pinnaclensis and P. caudiannulatus, which also have cylindrical, non-depressed, tapering tails.

The rostral scale is fully divided in the Oakview leaf-tailed gecko, whereas it is partly divided in P. gulbaru and P. pinnaclensis. The Oakview species is generally less spinose than P. caudiannulatus.

The most useful distinction from P. caudiannulatus is the underside of the hindlimb. The Oakview leaf-tailed gecko has uniform granules there, while P. caudiannulatus has granules mixed with pronounced, raised tubercles.

  • Record the tail condition, including whether it is original or regenerated.
  • Photograph the head, tail and underside of a hindlimb where handling is authorised.
  • Do not rely on general brown colour or body tubercles alone for identification.

Identification: Field signs and detection

The species is very cryptic and is usually detected as a gecko sheltering among boulders or in hollows, or moving over rocks and low vegetation at night.

No diagnostic tracks, scats, calls, nests, sloughs or eyeshine characteristics are described in the supplied documents. Absence of daytime observations does not indicate absence from suitable habitat.

For project surveys, search the rock surface, crevices, hollows and vegetation immediately above suitable rocky vine forest after dark, using methods approved for a Critically Endangered reptile.

  • Treat suitable Araucarian vine forest over deep broken igneous rock as potential habitat even when no gecko is seen.
  • Avoid moving rocks or inserting equipment into crevices unless this is covered by an approved survey method.
  • Use a qualified herpetologist or fauna spotter catcher for handling, identification and any relocation decision.

Distribution: National range

The Oakview leaf-tailed gecko is endemic to Queensland and is currently known only from the Oakview area. Searches between Oakview and the nearest other Phyllurus population have not found additional populations.

The species is known only from Queensland, Australia. Its range is centred on Oakview National Park and Oakview State Forest near Kilkivan, about 40 km west-north-west of Gympie, in south-east Queensland.

The records are associated with the South East Queensland Bioregion. No international records or records from other Australian states are reported.

State: Queensland only

Bioregion: South East Queensland

Nearest related population: Phyllurus caudiannulatus at Bulburin, about 195 km to the north

Distribution: Strongholds and subpopulations

Several disjunct localities are known within Oakview National Park and State Forest. The original type locality was Oakview Forest Reserve, now within a protected area estate.

The largest known population is associated with core rocky vine forest habitat in Oakview National Park. Some known habitat also occurs near the edge of hoop pine plantations in Oakview State Forest.

Surveys at intervening and nearby sites, including Mudlo and Wrattens, have not found additional Phyllurus populations. The species is therefore highly likely to be restricted to Oakview.

Known site size: About 0.8 to 6.1 ha for currently known rocky sites

Vine forest in the wider Oakview area: About 1,800 ha, although most is not suitable because the required rock layer is patchy

Population size: Not quantified

Population trend: Not quantified; habitat quality and extent are threatened by fire, weeds, pest animals and disturbance

Distribution: Development survey context

Modelled potential habitat in Oakview National Park covers about 1,252 ha, but this is likely to overestimate occupied habitat because the species is restricted to particular rocky outcrops beneath vine forest.

The 2019 bushfire affected about 99 ha of modelled potential habitat in the park. Core occupied habitat containing the largest known population was successfully defended from direct fire impact, although a fireline affected some suitable habitat and nearby detection rates declined compared with previous years.

  • Do not use the modelled potential habitat area as a substitute for field assessment of rock substrate and vine forest condition.
  • Map rocky outcrops, vine forest edges, firelines, access tracks and any proposed clearing footprint before works commence.

Habitat: Vegetation and substrate

The species has a very narrow habitat association. It occurs in moist semi-evergreen or Araucarian vine forest where a deep layer of broken igneous rock provides the required shelter structure.

Known habitat is Araucarian vine forest corresponding to Regional Ecosystems 12.12.13 and 12.12.16, growing over deep broken igneous rock or silicic ash-flow tuff.

The gecko does not use suitable-looking rock substrates outside vine forest, even where rock is next to occupied habitat. It also rarely moves far into vine forest where the rocky ground layer is absent.

The required rock is layered, broken and highly patchy beneath the vegetation. A rocky outcrop generally needs to exceed about 0.8 ha to support the species.

Regional ecosystems: 12.12.13 and 12.12.16

Rock type: Broken igneous rock, including silicic ash-flow tuff

Indicative outcrop size: More than about 0.8 ha

Habitat: Site structure and setting

The type locality was a narrow strip of moist semi-evergreen vine forest about 120 m wide at its widest point, on a ridge summit at about 540 m elevation.

Important structural features include boulders, deep interstitial spaces between broken rocks, rock crevices, hollows and low vegetation over or beside the rock.

The species is strongly associated with moist forest conditions. The supplied documents do not define a lower or upper temperature, rainfall or soil-moisture limit.

Recorded elevation: About 540 m at the type locality

Habitat strip at type locality: About 120 m wide at its widest point

  • Retain the full vine forest and rocky ground layer around any proposed work area, not only isolated large boulders.
  • Protect the forest edge from machinery, fireline construction, weed invasion and increased exposure.
  • Assess adjacent disturbed areas because clearing, roads and firelines can create pathways for weeds, pest animals and pathogens into suitable habitat.

Foraging habitat: Diet and feeding sites

The Oakview leaf-tailed gecko forages at night across rocks and low vegetation above the rocky ground layer. Its prey is not documented to species level.

The species likely feeds on small invertebrates, including arthropods, as do other members of the genus.

It actively forages over boulders, rock surfaces and low vegetation above the rock throughout the night. The moist vine forest and complex rock surface are likely to support the prey and cover needed for this behaviour.

There are no documented key food plants, prey species, feeding densities or daily foraging distances.

Diet: Small invertebrates, probably including arthropods

Foraging period: Night

Foraging surface: Rocks and low vegetation above the rocky ground layer

Foraging range: Not quantified

  • Retain low vegetation and leaf litter around rocky outcrops unless an approved ecological management plan specifies otherwise.
  • Avoid night lighting, dust, noise and repeated vehicle movement around known or potential rocky vine forest habitat.
  • Do not treat cleared rock outside vine forest as equivalent foraging habitat.

Breeding habitat: Breeding biology

Breeding information is limited. The only species-specific reproductive observation is a female with two oviducal eggs in late September, supported by the breeding pattern reported for other Phyllurus species.

The holotype female, collected in late September, had two eggs visible through the body wall. Other Phyllurus species typically lay two eggs in October and November, sometimes communally in crevices.

The documents do not provide a confirmed incubation period, hatching month, age at sexual maturity, lifespan, generation length or natural mortality rate for this species.

Breeding habitat is expected to be within the same moist vine forest and broken-rock habitat used for shelter, particularly protected crevices and hollows that maintain suitable moisture.

Breeding season: Likely October to November, based mainly on other Phyllurus species; a female with eggs was recorded in late September

Clutch size: Two eggs

Incubation: Unknown

Age at maturity: Unknown

Lifespan: Unknown

Communal laying: Reported for other Phyllurus species, but not confirmed for this species

  • Treat rock crevices, interstitial spaces and hollows as potential breeding habitat during September to November.
  • Avoid clearing, vibration, rock movement, fire and chemical disturbance around occupied rocky vine forest during the breeding period.
  • Do not assume that a site is unoccupied because eggs, nests or hatchlings are not visible.

Sheltering habitat: Refuges

Daytime shelter is provided by the rock structure beneath moist vine forest. The gecko uses spaces that are easily crushed, filled or exposed by clearing and heavy machinery.

The species shelters by day among boulders and in hollows. It also depends on interstitial spaces within deep layers of broken rock.

Shelter is closely tied to the combination of rocky ground and vine forest. Rock alone outside vine forest is not used, according to available observations.

The documents do not give dimensions for individual crevices, hollows or shelter spaces.

Day shelter: Boulders and hollows

Shelter substrate: Deep, broken igneous rock with interstitial spaces

Known shelter dimensions: Not reported

  • Keep machinery, stockpiles, spoil, firebreaks and temporary access tracks out of rocky vine forest habitat.
  • Prevent trampling and compaction of the broken-rock layer, including by feral deer and construction traffic.
  • Retain canopy cover and ground vegetation that help maintain moist, shaded conditions around the rock.

Threats: Clearing and fragmentation

The main risks are loss and degradation of the small amount of suitable rocky vine forest. For projects, direct clearing, rock disturbance, access tracks, fire management and pathogen movement require particular attention.

Past clearing reduced the potential vine forest habitat at Oakview by about 17 percent. Much of this clearing was for hoop pine plantations, although the amount of suitable rocky habitat lost is unknown.

Harvesting or thinning near hoop pine plantations may remove geckos or degrade habitat where a suitable rocky ground layer remains. Known habitat occurs near the edge of two plantations, and further plantations remain unsurveyed.

The habitat is naturally disjunct because the required rock layer is patchy. Further clearing, edge creation or separation of rocky patches can reduce habitat quality and connectivity.

Historic potential vine forest reduction: Approximately 17 percent

Known plantation association: Edge of two hoop pine plantations

  • Avoid clearing any vine forest over deep broken rock until a targeted assessment has been completed.
  • Survey unsurveyed plantation edges and proposed access routes where the rock layer may be present.
  • Keep construction footprints, laydown areas and spoil outside rocky vine forest and its immediate edge.

Threats: Fire and firelines

Wildfire has burnt into the margins of known habitat, reducing patch size and allowing weed encroachment. Vine forest is fire-sensitive and recovery after substantial fire may take decades.

The 2019 bushfire burnt about 99 ha of mapped vine forest or modelled gecko habitat in Oakview National Park. Core occupied habitat was protected, but fireline construction and back-burning affected adjacent suitable habitat and created pathways for weeds, pest animals and pathogens.

Hotter conditions, more extreme temperatures, longer periods of hot days, harsher fire weather and increased drought are projected for the region.

2019 mapped potential habitat burnt: About 99 ha, or 7.9 percent of modelled habitat in Oakview National Park

Core habitat impact: Core occupied habitat was successfully defended from direct fire impact

  • Exclude fire from optimal rocky vine forest habitat where practicable.
  • Design temporary firelines and suppression access to avoid the rocky ground layer and core habitat.
  • Inspect firelines and burnt edges for weed and pest incursions after fire.

Threats: Weeds and pest animals

Cat’s claw creeper, coral berry, lantana and high-biomass grasses can alter vine forest structure, ground cover, moisture and fire behaviour. Cat’s claw creeper can smother vegetation from ground level to canopy and is difficult to control once established.

Feral cats and foxes are present and may prey on geckos. Feral pigs may take small reptiles, disturb the rocky ground layer, spread weeds and move pathogens. Red deer trample and compact the interstitial shelter spaces, browse vegetation, ring-bark trees and promote weed invasion.

Recently burnt areas may provide easier access and increased foraging opportunity for feral cats and other pest animals.

  • Control weed incursions before they establish within or beside rocky vine forest.
  • Include feral cat, fox, pig and deer controls in project environmental management plans where works are near known habitat.
  • Prevent vehicles, equipment and soil movements from spreading weeds into core habitat.

Threats: Disease, access and disturbance

Fatal exotic reptile diseases are a potential risk to the species. The small, isolated range means a disease introduction could have severe consequences.

Phytophthora has not been recorded at the site in the supplied documents, but forestry machinery, feral pigs and red deer could introduce or spread soil-borne pathogens. Public access and illegal collection are also concerns.

Roads, tracks and construction access can increase human entry, introduce pathogens and create fire, weed and pest pathways. The documents do not identify a direct hydrology-change threat, but changes that dry the moist vine forest or alter shelter microclimate would be inconsistent with the species' known habitat requirements.

Disease status: No fatal exotic reptile disease is reported from the species, but introduction is identified as a potential threat

Phytophthora status: Not recorded at the site in the supplied assessment; considered a potential threat

  • Use clean-down, hygiene and restricted-access procedures for people, vehicles, machinery and equipment entering potential habitat.
  • Keep project access out of core rocky vine forest and maintain locked gates or other approved access controls where required.
  • Refer any proposed drainage, dewatering or water diversion near vine forest to a qualified ecologist because the species depends on moist forest conditions.

Survey methodology: 1. Map and inspect suitable habitat

Survey for the Oakview leaf-tailed gecko must target small, isolated patches of Araucarian vine forest over deep broken igneous rock. The species is nocturnal and cryptic, so daytime habitat assessment should be combined with night searches and, where appropriate, camera trapping.

Before night work, map vine forest, rocky outcrops, boulder fields, rock crevices and adjacent disturbed areas within and around the proposed disturbance footprint.

Prioritise rocky outcrops larger than approximately 0.8 ha, because known supporting sites range from approximately 0.8 ha to 6.1 ha.

Do not treat all vine forest as suitable habitat, because the gecko rarely uses vine forest without a rocky ground layer and does not use exposed rock outside vine forest.

Known area: Oakview National Park and State Forest near Kilkivan, approximately 40 km west-north-west of Gympie, Queensland

Habitat: Araucarian vine forest, including Regional Ecosystems 12.12.13 and 12.12.16, over deep broken igneous rock

Known site size: Approximately 0.8 to 6.1 ha

Survey methodology: 2. Nocturnal searches

Search at night when geckos are active, using passive visual searches and spotlighting across rock surfaces, crevices, boulders, hollows and low vegetation above the rocky ground layer.

Search both burnt and unburnt suitable habitat where fire or other disturbance has occurred, because this approach was used in the Oakview post-fire assessment.

Record the search date, start and finish times, weather, fire history, searchers, route, area searched and all detections or non-detections.

Use experienced observers familiar with leaf-tailed geckos and compare any suspected animal with the diagnostic features, including the fully divided rostral scale and uniform granules on the underside of the hindlimb.

Activity period: Nocturnal; shelters by day among boulders and in hollows and forages at night over rocks and low vegetation

Documented approach: Passive nocturnal searches in burnt and adjacent unburnt rocky habitat

Identification features: Grey-brown body with dark mottling, pale spots and usually 5 to 6 pale tail bands; regenerated tails lack the original bands and tubercles

Survey methodology: 3. Remote cameras and targeted follow-up

Deploy motion-triggered cameras where direct searches are difficult, particularly at rock shelters, crevices, boulder edges and likely movement routes between retained habitat patches.

Use cameras as a supplement to, not a replacement for, nocturnal searches, because the supplied documents do not establish camera sensitivity or a species-specific camera deployment effort.

Repeat searches or camera checks where habitat is fragmented, where initial detection is low, or where works could affect a disjunct population.

If a gecko is detected, obtain photographs and location data without handling it unless an authorised fauna handler is required for an approved management action.

Documented monitoring methods: Camera trapping and passive nocturnal searches

Known distribution: Highly likely to be restricted to Oakview, with no additional Phyllurus populations found in surveyed areas between Oakview and Bulburin

Survey methodology: Minimum effort and reporting

  • Use the project approval, state survey requirements and fauna survey plan to set the final number of nights, camera deployments and search area, because the supplied documents do not prescribe a species-specific minimum effort in nights, hours, transect length or trap nights.
  • Survey all suitable rocky vine forest within the proposed impact area and an appropriate retained-habitat control area where access and approvals allow.
  • Document limitations such as inaccessible cliffs, dense vegetation, fire conditions, weather, incomplete camera coverage and disturbed or unsafe habitat.
  • Submit verified records, including non-detections where required by the project or approval, to the relevant Queensland wildlife database, including WildNet, and provide records to the project approval authority.
  • Treat a suspected Oakview leaf-tailed gecko as a significant detection until confirmed by an appropriately qualified herpetologist.

Before habitat disturbance: Avoid and minimise

Avoiding disturbance to occupied rocky vine forest is the first control. The species has a very small, fragmented distribution and depends on shelter spaces between rocks, moist vine forest and low vegetation above the rock.

  • Avoid clearing or disturbing occupied and potential rocky vine forest, especially outcrops larger than approximately 0.8 ha and known sites up to 6.1 ha.
  • Retain the deep broken igneous rock layer, boulders, rock crevices, hollows, vine forest canopy, ground vegetation and low vegetation above the rocks.
  • Keep fire control lines, roads, machinery access and construction compounds out of retained rocky vine forest wherever practicable.
  • Maintain connections between retained patches of suitable vine forest and rocky habitat, because known habitat is highly isolated and disjunct.
  • Do not assume that adjacent exposed rock is suitable if the associated vine forest is removed, because the species does not use rock substrates outside vine forest.

Before habitat disturbance: Approvals and project planning

  • Confirm the current EPBC Act listing and obtain an EPBC Act referral or approval if the action may have a significant impact on this nationally listed species.
  • Obtain Queensland approvals, permits and authorisations required for clearing, fauna survey, handling, relocation and works in or near protected habitat.
  • Prepare a fauna management plan that identifies the species, suitable habitat, survey methods, exclusion areas, fauna handler responsibilities, stop-work triggers, relocation arrangements and reporting requirements.
  • Stage works so that the smallest practicable area is opened at one time and retained habitat is protected from machinery, fire, weeds and pest animals.
  • Schedule works with regard to the species' nocturnal activity and breeding information, noting that related Phyllurus species commonly lay two eggs in October to November and that the species' generation length is unknown.

Before habitat disturbance: Pre-clearance preparation

  • Complete a pre-clearance habitat inspection and approved nocturnal survey before disturbance of suitable rocky vine forest.
  • Mark no-go areas, rock outcrops, shelter crevices, vine forest edges, hollows and any confirmed gecko locations on plans and on the ground.
  • Install exclusion fencing where it can prevent machinery, people, deer, pigs or other pests entering retained habitat without blocking essential movement between retained patches.
  • Brief all workers on the species' appearance, shelter sites, access restrictions, hygiene requirements and the procedure for a detection.
  • Clean and inspect machinery, footwear and equipment before entering retained habitat to reduce the risk of spreading weeds, reptile disease and Phytophthora.

During habitat disturbance: Daily controls

The fauna spotter catcher must control the interface between machinery and rocky vine forest. Work must stop when an animal, occupied shelter or unexpected suitable habitat is found.

  • Check exclusion fencing, no-go markers, access controls and erosion or sediment controls before work starts each day.
  • Keep machinery, spoil, fuels, wash-down water and workers out of retained vine forest and rocky outcrops.
  • Maintain weed hygiene and pathogen hygiene for vehicles, boots, tools and handling equipment, particularly when moving between habitat patches.
  • Prevent fire, smoke, hot works and accidental ignition near retained vine forest, because the habitat is fire-sensitive and fire can reduce moisture, prey abundance and cover.
  • Inspect for new weed incursions, especially cat's claw creeper, coral berry, lantana and high-biomass grasses, and report or control them under the management plan.

During habitat disturbance: Spotter catcher and machinery interface

  • Use a qualified and authorised fauna spotter catcher to inspect the work area immediately before disturbance and to remain present while machinery operates near suitable habitat.
  • Direct the operator to stop, isolate machinery and await instructions whenever the spotter catcher identifies a gecko, a potential shelter crevice, a new rocky outcrop or a previously unmarked habitat feature.
  • Clear progressively in small stages so the spotter catcher can inspect exposed rock, hollows, crevices and vegetation before the next section is disturbed.
  • Do not use machinery to collapse, crush, bury or move boulder fields, rock piles or crevice habitat unless the approved action specifically addresses the risk and the fauna handler has cleared the area.
  • Keep all personnel away from a detected gecko until the authorised handler has assessed it.

During habitat disturbance: If the gecko is found

  • Stop work immediately within the detection area and establish a quiet exclusion zone around the animal and its shelter.
  • Do not handle the gecko unless the person is authorised under the approval and fauna management plan and handling is necessary to prevent harm or complete an approved relocation.
  • Prefer leaving the animal in place and redesigning or avoiding the disturbance where practicable.
  • If an approved relocation is required, move the gecko only to nearby retained suitable vine forest with deep broken rock, shelter crevices and comparable moisture conditions, as directed by the relevant wildlife authority or approval.
  • Record the exact location, date, time, habitat feature, photographs, behaviour, handler, action taken and release location.
  • Place an injured gecko in a secure, ventilated container and transfer it promptly to an approved reptile veterinarian or licensed wildlife carer, following the project fauna protocol.

During habitat disturbance: Stop-work triggers and records

  • Stop work if a gecko is detected, if an occupied or potentially occupied shelter is exposed, if works enter marked habitat, or if fencing and access controls fail.
  • Stop work if fire, weeds, feral animals, contaminated machinery or pathogen risks threaten retained habitat and cannot be controlled immediately.
  • Notify the site environmental officer, project manager, fauna handler and relevant approval authority of a detection or incident within the timeframe specified by the approval.
  • Maintain daily records of personnel, work areas, weather, searches, detections, injuries, relocations, habitat features disturbed, controls inspected and corrective actions.
  • Report any unexpected concentration of geckos or new population location to the relevant Queensland wildlife database and government authority.

After habitat disturbance: Post-clearance checks

Post-clearance work must confirm that no animals or shelter features were missed and that retained habitat remains protected. Recovery should be tracked because burnt or disturbed vine forest may take decades to recover.

  • Inspect the completed work area, edges, spoil areas and access routes for overlooked geckos, exposed crevices, collapsed shelter spaces and new weed incursions.
  • Complete follow-up nocturnal searches and camera monitoring where habitat was cleared, burnt, excavated or exposed, with effort set by the approval and fauna management plan.
  • Check that retained rocky vine forest has not been damaged by machinery, fire control lines, sediment, altered drainage, weed spread or pest animal activity.
  • Repair failed exclusion fencing and remove temporary materials that could trap or injure reptiles.

After habitat disturbance: Monitoring and adaptive management

  • Monitor gecko detections, habitat condition, shelter spaces, weed cover, fire impacts, deer activity and feral cat, fox and pig activity in retained and rehabilitated habitat.
  • Compare detection rates with pre-work or reference-site results where those data exist, noting that direct fire impacts were difficult to quantify because baseline information was limited.
  • Increase weed, pest, fire or access controls if monitoring shows declining detections, loss of shelter spaces, increased predators or habitat degradation.
  • Retain monitoring data and photographs in a spatial project database and provide results to the relevant Queensland wildlife database and approval authority.

After habitat disturbance: Compliance, rehabilitation and offsets

  • Submit completion and incident reports required by EPBC Act and Queensland approvals, including clearing areas, habitat retained, fauna interactions, relocations and rehabilitation actions.
  • Maintain access restrictions, locked gates and other controls that reduce illegal collection, human disturbance and disease introduction.
  • Implement any approved offset, compensatory habitat or conservation payment requirement where residual impacts cannot be avoided or mitigated.
  • Do not treat an offset as a substitute for retaining occupied rocky vine forest and its shelter structure at the work site.

Rehabilitation actions: Restore habitat structure

Rehabilitation should recreate the conditions that define Oakview leaf-tailed gecko habitat: moist vine forest over deep broken igneous rock, with stable shelter spaces and low vegetation above the rocks. Restoration will be slow where fire or clearing has removed mature vine forest structure.

  • Retain and, where practicable, reinstate stable boulders, broken rock and interstitial spaces used for shelter, without sealing or compacting the gaps.
  • Restore vine forest structure using locally appropriate native species from the relevant Araucarian vine forest regional ecosystems, including Regional Ecosystems 12.12.13 and 12.12.16.
  • Re-establish canopy, mid-storey and low vegetation above the rocky ground layer while avoiding dense weed growth that changes the microclimate or blocks shelter spaces.
  • Do not import rock, soil, mulch or plant material unless it is clean and pathogen-free and its use is approved for the site.
  • Do not install nest boxes as a substitute for natural rock and hollow shelter, because the supplied documents identify boulders, hollows and rock crevices rather than nest boxes as the species' shelter features.

Rehabilitation actions: Control weeds, pests and fire

  • Control cat's claw creeper, coral berry, lantana and high-biomass grasses before they dominate the recovering vine forest or increase future fire intensity.
  • Use regular surveillance, rapid treatment and follow-up monitoring around rehabilitation areas, roads, firelines and retained habitat edges.
  • Control feral cats, foxes, deer and pigs in accordance with approved pest management methods, because these animals can prey on geckos, damage shelter spaces, spread weeds or move pathogens.
  • Apply strict hygiene controls to reduce the risk of reptile disease and Phytophthora entering rehabilitated or retained habitat.
  • Manage surrounding fire-adapted vegetation to reduce the chance of high-intensity fire entering vine forest, while excluding fire from optimal gecko habitat where practicable.

Rehabilitation actions: Measure recovery

Expected recovery period: Recovery of fire-affected vine forest may take decades

Documented monitoring methods: Camera trapping and passive nocturnal searches

  • Set recovery points for survival and cover of locally sourced vine forest plantings, retention of open shelter spaces between rocks, weed presence, pest activity, fire damage and gecko detections.
  • Use repeat nocturnal searches and camera trapping to monitor use of restored and retained rocky habitat, with survey effort specified in the approved monitoring plan.
  • Monitor adjacent unburnt reference habitat as well as rehabilitated areas so changes in detection rates can be interpreted against local conditions.
  • Continue monitoring until the approval authority accepts that habitat structure, weed and pest controls, fire protection and species use meet the agreed success measures.
  • Treat declining detections, loss of rock shelter, increasing weeds or increased predator and deer activity as triggers for corrective management.

Sources