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Yellow-snouted Ground Gecko (Lucasium occultum)

The Yellow-snouted Ground Gecko is a small, nocturnal, ground-dwelling gecko endemic to the Northern Territory. It is known from north-west Kakadu National Park and Wildman Reserve, with a highly restricted and fragmented range. Clearing, loss of leaf litter, frequent intense fire and introduced pasture grasses are the main development and land-management concerns.

Conservation status

Commonwealth, EPBC Act 1999: Endangered.

Northern Territory, Territory Parks and Wildlife Conservation Act 1976: Vulnerable.

Breeding season

Wild breeding timing is not recorded for the Yellow-snouted Ground Gecko. It is an oviparous, nocturnal species, so clearing should be planned on the basis that eggs, hatchlings and sheltering animals may be present at any time, with activity likely highest from October to December.

Reproductive mode: Oviparous.

Clutch size: Two eggs on average.

Incubation: Not recorded.

Size at hatching or birth: 23.5 mm snout to vent length.

Age at maturity: Not recorded.

Nest or egg sites: Not recorded.

Breeding frequency: Not recorded.

Confirm timing locally using rainfall and temperature conditions, recent records and targeted night surveys, particularly before clearing ground cover or soil in potential habitat.

  • Mating: No mating months are recorded for this species. Treat mating as possible throughout the year when planning clearing, because no reliable seasonal window is available.
  • Gravid females: The species is oviparous, but the duration and seasonal timing of gravid females are not recorded. Assume gravid females may be present in any month.
  • Egg laying: Egg laying is confirmed by the oviparous reproductive mode, but laying months and nest sites are not recorded. Retain leaf litter, ground debris, earth cracks and spider burrows throughout the year because these features may provide shelter for eggs or young.
  • Incubation: Incubation length and the months when eggs remain in nests or soil are not recorded. Treat eggs as potentially present throughout the year in undisturbed ground refuges.
  • Hatchlings: A hatchling length of 23.5 mm snout to vent is recorded, but emergence months and abundance peaks are not known. Hatchlings may therefore be present in any month, including within leaf litter, ground debris, cracks and burrows.
  • Active period: The species is nocturnal and is likely to be active year round. Existing survey guidance indicates reduced activity in the coldest months and peak activity from October to December, but this timing is indicative rather than species-specific.
  • Winter inactivity: No brumation is recorded. Reduced activity is expected during the coldest months, treated here as June to August for planning in the tropical north, when animals may remain in ground debris, cracks or spider burrows and be less able to escape machinery.
  • Highest clearing risk: Clearing risk applies throughout the year because the timing of mating, egg laying, incubation and hatchling emergence is unknown. Risk can increase during the October to December activity peak and whenever ground refuges contain eggs, young or inactive animals.

Identification

This is a very small ground gecko that is usually detected at night. Identification should be supported by a clear colour photograph, particularly because capture rates are very low and the species resembles the Crowned Gecko.

The Yellow-snouted Ground Gecko has a snout-to-vent length of about 40 mm. It is dark brown above, with a reddish head, four large, squarish, pale brown blotches along the back, and scattered whitish spots on the flanks and limbs.

Size: About 40 mm snout-to-vent length.

Weight: Not reported in the supplied sources.

Body pattern: Four large, squarish, pale brown dorsal blotches separated by darker brown areas.

Identification: Similar species

The main potential confusion species in the far north of the Northern Territory is the Crowned Gecko, Lucasium stenodactylum. The Yellow-snouted Ground Gecko has four large pale brown dorsal patches with dark interspaces, while the Crowned Gecko is more uniformly light reddish brown with pale vertebral markings forming a stripe. The Yellow-snouted Ground Gecko also has rectangular lamellae under the toes, rather than the small, granular scales reported for the Crowned Gecko.

  • Take a good quality colour photograph of any suspected individual.
  • Submit the photograph and record details to the relevant Northern Territory fauna authority and the Northern Territory Museum for confirmation and databasing.

Identification: Field detection and signs

The species is nocturnal and active on the ground. Walking transects at night with a powerful torch can detect eye shine in open forest. A low-held gas light has also been suggested for detecting moving ground geckos. There are no documented species-specific tracks, scats, calls, nests or sloughs in the supplied sources.

Reported detection rate: 10 individuals from about 22,000 trap-nights.

Recommended pitfall spacing: 5 m between shallow 5 litre buckets.

  • Search on foot after dark, especially from sunset to the first three hours of darkness.
  • Do not treat a failure to detect the species as proof of absence. About 10 individuals were reported from approximately 22,000 trap-nights, indicating very low detection rates.
  • Use pitfall trapping only as part of an appropriately designed survey. Shallow 5 litre buckets spaced 5 m apart with low drift fencing have been used, but capture rates have been extremely low and trapped lizards may face increased predation risk.
  • Record the exact location, date, time, habitat, weather and a photographic voucher for every suspected record.

Distribution

The Yellow-snouted Ground Gecko is endemic to the Northern Territory. Its confirmed range is small, fragmented and concentrated in the Alligator Rivers region.

All known records are from the Northern Territory. The known range includes north-west Kakadu National Park and Wildman Reserve, with the species associated with the adjoining Mary River, Wildman and West Alligator catchments. The extent of occurrence was estimated at approximately 1,283 km² from 17 records.

Australian states and territories: Northern Territory only.

Bioregional setting: Alligator Rivers region, including Kakadu and the adjoining Mary River and Wildman catchments.

Known strongholds: North-west Kakadu National Park and Wildman Reserve.

Extent of occurrence: Approximately 1,283 km² from 17 records.

Distribution: Subpopulations and abundance

Two known populations were identified in the supplied profile, in Kakadu National Park and Wildman Reserve. Both occur within reserves, but the species has also been discussed in relation to privately managed land near its known sites. The total population cannot be estimated because no mark and recapture study has been completed, although the very low capture frequency suggests low population density and a small total population.

Known populations: Two broad known populations, in Kakadu National Park and Wildman Reserve.

Population estimate: Not available because mark and recapture studies have not been undertaken.

Population indication: Probably present at very low density; only 10 individuals were reported from about 22,000 trap-nights.

Population trend: Not established in the supplied sources.

  • Treat records outside the known Kakadu and Wildman areas as important range information and obtain a photographic or specimen-based confirmation.
  • Do not assume that suitable-looking forest is occupied. The species has been missed during many intensive fauna surveys.

Habitat: Vegetation and ground structure

The species is associated with lowland open forest containing ground cover. Habitat quality depends on retaining leaf litter, grasses and relatively intact ground structure beneath Eucalyptus woodland.

Records are associated with open forests dominated by Darwin Woollybutt, Eucalyptus miniata, and Darwin Stringybark, Eucalyptus tetrodonta. Well-developed leaf litter and grasses are recurring habitat features. Records from Wildman Reserve include sandy red-loam substrates and sites with sparse to moderate Gamba Grass cover.

Dominant vegetation: Open forest dominated by Eucalyptus miniata and Eucalyptus tetrodonta.

Ground layer: Well-developed leaf litter and grasses.

Substrate reported in project material: Sandy red-loam substrates.

Introduced grass association: Some Wildman Reserve records occurred where Gamba Grass cover was sparse to moderate.

  • Map and retain Eucalyptus miniata and Eucalyptus tetrodonta open forest where it occurs in the project area.
  • Inspect the ground layer for continuous or well-developed leaf litter, grasses and other debris before clearing.
  • Treat sandy red-loam areas with suitable open forest as potential habitat where they occur within or near the known range.

Habitat: Climate and elevation

The supplied sources describe the species as a lowland open-forest gecko in tropical northern Australia. No elevation limit, microclimate threshold or quantified temperature range is provided.

Elevation limit: Not reported.

Climate setting: Tropical northern Australia, in lowland open forest.

  • Use mapped vegetation, ground cover and regional records rather than elevation alone to assess potential habitat.
  • Include nearby intact habitat in the assessment because the known range is restricted and fragmented.

Foraging habitat: Feeding behaviour

Species-specific diet, prey items and foraging distances have not been documented in the supplied sources. Field assessment should therefore focus on retaining the ground-layer structure used by this nocturnal gecko while avoiding unsupported assumptions about particular prey.

The species is a small, nocturnal gecko that is active on the ground. The supplied sources do not state its diet, prey species, feeding rates or foraging range.

Diet: Not reported in the supplied sources.

Foraging period: Nocturnal, with likely peak activity between sunset and the first three hours after dark.

Foraging range: Not reported.

  • Record leaf litter depth or condition, grass cover, bare ground, fallen debris and nearby shelter features during habitat assessment.
  • Avoid describing particular insects or other prey as confirmed food items unless supported by project-specific evidence.
  • Retain connected ground cover and avoid unnecessary night lighting in potential habitat, as the species is active after dark.

Foraging habitat: Habitat used while foraging

The available records link the species with open Eucalyptus miniata and Eucalyptus tetrodonta forest containing well-developed leaf litter and grasses. These features are likely to provide the ground structure used while the gecko is active, but the precise relationship between prey availability and vegetation condition has not been studied in the supplied material.

  • Keep machinery, spoil and slash off retained leaf litter and grass cover where possible.
  • Avoid creating isolated strips of ground habitat separated by cleared areas.
  • Use night searches along representative open-forest transects to check for active animals before disturbance.

Breeding habitat: Breeding information

Very little is known about breeding in the wild. The available information confirms successful captive production but does not provide a wild breeding season, clutch size, incubation period, maturity age or lifespan.

Two individuals brought into captivity in August 2000 produced 12 hatchlings during the 12 months to March 2001. This demonstrates reproductive capacity but does not establish the number of clutches, eggs per clutch, incubation period or natural breeding season.

Wild breeding season: Not reported.

Captive reproductive record: Two individuals produced 12 hatchlings in the 12 months to March 2001.

Clutch size: Not reported.

Gestation or incubation: Not reported.

Age at maturity: Not reported.

Lifespan: Not reported.

  • Treat suitable ground cover and shelter within open forest as potential breeding habitat because eggs and young may be difficult to detect.
  • Avoid clearing during any period when eggs or hatchlings may be present unless survey and impact controls have addressed this uncertainty.

Breeding habitat: Breeding habitat features

The species has been recorded in open Eucalyptus miniata and Eucalyptus tetrodonta forest with well-developed leaf litter and grasses. The supplied survey guidance indicates that related Lucasium geckos may shelter beneath ground debris, in earth cracks or in spider burrows, but it does not confirm which of these features are used for breeding by this species.

  • Retain leaf litter, fallen debris, earth cracks and other undisturbed ground features in potential habitat.
  • Do not remove or fill spider burrows and ground cracks without considering them as possible refuges for eggs or young.
  • Keep a buffer around retained habitat where clearing could otherwise expose the ground layer to hotter fire, drying or predation.

Sheltering habitat: Day refuges

The species is presumed to shelter during the day in small ground-level refuges. These features are easily removed or buried during clearing and earthworks.

Survey guidance describes the species as presumably sheltering by day beneath ground debris, in earth cracks or in spider burrows. The main profile records the species with well-developed leaf litter and grasses, which provide additional ground cover.

Refuge types: Ground debris, earth cracks and spider burrows are identified as likely shelter sites.

Refuge size: Not reported.

Hollows and tree roosts: No association reported.

  • Retain fallen timber, bark, leaf litter, grass tussocks, earth cracks and intact soil in potential habitat.
  • Do not stockpile soil, mulch, vegetation or construction materials over retained ground cover.
  • Inspect proposed clearing areas during daylight for ground debris, cracks and burrows, while recognising that absence of a visible refuge does not exclude the species.

Sheltering habitat: Fire and shelter quality

Hotter and more frequent fires can remove the leaf litter used for shelter and increase exposure to predators. Introduced Gamba and Mission grasses can increase fuel loads and fire intensity in open forest, making ground refuges less suitable.

Reported fuel-load change from exotic grasses: Fuel loads were reported as three to five times higher than in comparable open forest with native grasses.

Reported fire-intensity change: Fire intensity was reported as up to eight times higher in the studied exotic-grass invaded forest.

  • Protect retained leaf litter and ground debris from unnecessary burning, grading and vehicle traffic.
  • Manage introduced pasture grasses in and around potential habitat where this is part of the project controls.
  • Plan fire breaks and other fire management measures so they do not unnecessarily remove the remaining ground cover.

Threats: Clearing and fragmentation

The main documented threats are habitat loss and degradation from altered fire regimes and introduced pasture grasses. Because the species has a small, fragmented range and apparently low density, even apparently local impacts should be assessed in the context of nearby records and remaining habitat.

Clearing removes open-forest habitat, leaf litter, grasses and ground refuges. The known range is restricted and fragmented, so clearing within or near the Kakadu, Wildman, Mary River and West Alligator areas should be assessed carefully.

  • Confirm whether the project contains Eucalyptus miniata or Eucalyptus tetrodonta open forest with suitable ground cover before clearing.
  • Avoid clearing connected patches of potential habitat where practicable.
  • Keep confirmed records, suitable ground cover and shelter features outside the disturbance footprint.
  • Use a qualified fauna spotter during clearing and stop work if a suspected individual is found.

Threats: Fire and invasive grasses

The current fire regime in the region is described as more extensive and more intense, with frequent late dry-season fires. The available evidence indicates that fire frequency is too high for the species. Gamba Grass and Mission Grass increase fuel loads and fire intensity, reduce leaf litter and may increase mortality of geckos and eggs. Gamba Grass cover was also negatively associated with the species in the Mary River catchment.

Fire timing identified as a concern: Frequent late dry-season fires are identified as a threat.

Grass species identified: Gamba Grass, Andropogon gayanus, and Mission Grass, Pennisetum polystachyon.

Documented association: Yellow-snouted Gecko abundance or occurrence was negatively associated with Gamba Grass cover in the Mary River catchment.

  • Avoid introducing or spreading Gamba Grass, Mission Grass and other invasive pasture grasses through vehicles, soil movement and rehabilitation materials.
  • Use weed hygiene and inspect machinery before entering potential habitat.
  • Design fire management to reduce frequent, intense fires and retain leaf litter and ground refuges.
  • Do not burn retained habitat as a routine clearing method without species-specific approval and controls.

Threats: Predation and other pressures

Loss of leaf litter from fire can increase predation risk. The survey guidance also notes that animals caught in shallow pitfall buckets may face increased predation by wild dogs, monitor lizards or birds. The supplied sources identify cats and cane toad poisoning as additional potential threats.

Predators or predator-related risks identified: Cats, wild dogs, monitor lizards, birds and increased predation following loss of leaf litter.

Other potential threat: Cane toad poisoning.

  • Use escape devices and predator protection on pitfall traps, and check traps at the frequency required by the approved survey design.
  • Do not leave captured reptiles exposed in traps or handling containers.
  • Include feral cat management and cane toad risk in project environmental controls where relevant to the site.

Threats: Roads, hydrology and disease

The supplied sources do not identify road mortality, hydrology change or disease as established threats for this species. Roads and earthworks can nevertheless remove or divide its ground habitat and alter fire access, weed spread and vehicle disturbance.

Road mortality: Not specifically documented in the supplied sources.

Hydrology change: Not specifically documented in the supplied sources.

Disease: Not specifically documented in the supplied sources.

  • Assess road and access-track alignments through suitable open forest and retain ground habitat outside the required footprint.
  • Control vehicle movement through retained habitat to reduce compaction, leaf-litter loss and weed spread.
  • Do not assume that the absence of documented road, hydrology or disease impacts means that project-specific risks are absent.

Survey methodology: 1. Spotlighting

Survey this small, nocturnal ground gecko in suitable open forest, especially where well-developed leaf litter and grasses occur beneath Darwin woollybutt and Darwin stringybark. Use night spotlighting as the primary method and treat non-detection cautiously because capture rates have been very low.

Conduct nocturnal searches on foot during the period when the species is most active, preferably in late spring and early summer. Activity is expected to peak between sunset and the first three hours after dark.

Search open forests dominated by Eucalyptus miniata and Eucalyptus tetrodonta, particularly areas with well-developed leaf litter, grasses and sandy red-loam substrates.

Walk transects at night using a powerful torch mounted on binoculars to detect eye shine. A low-held gas light may also be used to detect moving geckos within the illuminated area.

Give priority to warm conditions and avoid relying on surveys in the coldest months, when activity may be reduced. The species is probably active year round, but detectability is expected to be highest in late spring and early summer.

Record weather, temperature if measured, start and finish times, transect locations, search conditions, observer numbers and the area searched.

Body size: Snout-to-vent length about 40 mm

Likely peak activity: Sunset to the first three hours after dark

Likely best season: Late spring and early summer

Known distribution: North-west Kakadu National Park and Wildman Reserve, Northern Territory

  • Search slowly and inspect the ground surface, leaf litter, fallen debris, earth cracks and likely spider burrows without unnecessarily disturbing shelter sites.
  • Photograph any suspected Yellow-snouted Gecko in colour, showing the four large pale brown back patches and other identifying features.
  • Distinguish it from the crowned gecko, Lucasium stenodactylum, using the back pattern and coloration, and confirm records with the relevant Northern Territory fauna authority or museum.

Survey methodology: 2. Pitfall trapping

Pitfall trapping can be used as a supplementary method because the species has been recorded in pitfall surveys. It should not be the only method used to determine presence or absence.

Use a pitfall line with shallow 5 litre buckets spaced 5 metres apart and a low drift fence to intercept and direct animals into the buckets, where this method is approved and suitable for the site.

Inspect traps frequently and protect captured animals from predation, heat, dehydration and exposure. Shallow buckets can increase predation risk from wild dogs, monitor lizards and birds.

Interpret a non-detection cautiously. Across surveys in the Kakadu and Mary River region, only 10 individuals were reported from about 22,000 trap-nights, so low capture rates do not demonstrate absence.

Bucket size: 5 litres

Bucket spacing: 5 metres

Historical detection rate: 10 individuals from about 22,000 trap-nights

  • Place traps only where they can be checked, closed or removed promptly in unsuitable weather and where the project fauna management plan provides for animal welfare.
  • Do not use pitfall trapping as a substitute for nocturnal spotlighting in suitable open forest habitat.

Survey methodology: 3. Survey design and timing

Map the study area, native vegetation, habitat condition and ground features before selecting survey locations. Compare the species' habitat requirements with the habitat present in the disturbance footprint and nearby retained areas.

Include all suitable Eucalyptus miniata and Eucalyptus tetrodonta open forest, including areas with leaf litter, grasses, ground debris, earth cracks and sandy red-loam substrates.

Use the published threatened reptile survey guideline and consider previous survey effort, seasonal conditions and the very low detection rate when deciding whether additional survey is needed.

A 2022 project used nocturnal walking spotlight searches along five transects at Rustlers Roost, one transect at Quest 29 and two transects at Toms Gully, with searches extending up to 100 metres from each transect. Treat this as an example of project effort, not a universal minimum.

  • Survey all suitable habitat within the proposed clearing area and investigate connected suitable habitat that may be affected by access tracks, infrastructure, fire or edge effects.
  • Repeat surveys when the initial timing or conditions are unsuitable, particularly where work is proposed in suitable habitat and the species cannot be confidently excluded.

Survey methodology: Minimum effort and reporting

Set the final survey effort in the project survey plan after mapping habitat, reviewing existing records and assessing seasonal conditions. The plan must explain how the selected method and effort address the species' low detectability.

  • Use nocturnal spotlighting as the primary presence survey in suitable open forest habitat, with effort concentrated from sunset to the first three hours after dark and preferably in late spring or early summer.
  • Add pitfall trapping only where it is justified, approved and capable of being checked and managed safely.
  • Record every detection with coordinates, date, time, observer, method, habitat description, photograph and identification information.
  • Submit confirmed records to the relevant Northern Territory wildlife database or fauna authority and provide photo vouchers to the Northern Territory Museum where required.
  • Report survey effort and non-detections, including transect lengths or searched area, survey dates, start and finish times, weather, trap-nights and any limitations.

Before habitat disturbance: Avoid and minimise

Treat suitable open forest habitat as potentially occupied even when the species has not been recorded during a short survey. The known range is restricted and fragmented, and both known populations occur in reserves.

Avoid clearing well-developed leaf litter, ground debris, grasses and open forest dominated by Eucalyptus miniata and Eucalyptus tetrodonta wherever practicable.

Retain connected patches of suitable open forest between the work area and nearby retained habitat. Keep clearing boundaries as narrow as practicable and avoid creating unnecessary isolated patches.

Avoid increasing fire frequency or intensity in retained habitat. Prevent the spread of gamba grass, mission grass and other introduced pasture grasses into retained areas.

Use a site-specific habitat assessment to define no-go areas and buffers around retained habitat, rather than applying an unsupported fixed distance.

Known extent of occurrence: About 1,283 km², calculated from 17 records

Known populations: North-west Kakadu National Park and Wildman Reserve

Known habitat association: Open forest with well-developed leaf litter and grasses

  • Mark approved clearing limits, retained habitat, access routes and no-go areas before machinery arrives.
  • Protect leaf litter and ground shelter from unnecessary vehicle traffic, stockpiling, grading and repeated disturbance.
  • Include indirect risks from hotter fires, altered drainage, weeds and increased predation in the impact assessment.

Before habitat disturbance: Approvals and planning

Confirm whether the action may have a significant impact on this EPBC Act listed species. The Yellow-snouted Ground Gecko is listed as Endangered under the EPBC Act and Vulnerable in the Northern Territory.

Obtain any required Northern Territory permits, approvals and fauna handling authorisations before clearing or capturing animals.

Prepare a fauna management plan that identifies suitable habitat, survey results, clearing limits, fauna spotter catcher responsibilities, stop-work triggers, release sites, injury procedures, weed controls and fire controls.

Stage clearing so that retained habitat remains available while fauna searches and clearance proceed. Schedule work to avoid the coldest months where practicable and maximise the chance of detecting active geckos before disturbance.

Australian Government status: Endangered under the EPBC Act

Northern Territory status: Vulnerable

Recovery plan: No adopted or made Recovery Plan

  • Check the current EPBC referral requirements and the current Northern Territory threatened species requirements before finalising the method statement.
  • Give the fauna spotter catcher the approved clearing plans, habitat maps, permit conditions, emergency contacts and release-site details before work starts.
  • Use the approved conservation advice, listing advice and threatened reptile survey guideline when documenting the decision to avoid, survey or manage impacts.

Before habitat disturbance: Pre-clearance preparation

Complete a pre-clearance inspection of all suitable habitat immediately before works, with the inspection timing and method set out in the fauna management plan.

Mark leaf-litter patches, fallen debris, earth cracks, spider burrows and other ground shelters that will be retained or carefully managed during clearing.

Install exclusion fencing where it will keep machinery, vehicles or people out of retained habitat and where the fencing will not trap or injure ground-dwelling fauna.

Brief operators on the species' small size, nocturnal habits, likely shelter sites and the requirement to stop when directed by the fauna spotter catcher.

  • Remove or relocate machinery, spoil, fuel and materials from retained habitat before clearing begins.
  • Check that lighting, fencing and access arrangements do not block movement between retained suitable habitat patches.
  • Do not disturb marked shelter features before the fauna spotter catcher has assessed them.

During habitat disturbance: Daily controls and machinery coordination

Use a controlled clearing sequence with a fauna spotter catcher working directly with machinery operators. The species is small, cryptic and ground dwelling, so slow clearance and careful handling of ground shelter are required.

Hold a daily pre-start briefing covering the approved clearing boundary, habitat features, weather, search results, stop-work signals and the location of the fauna spotter catcher.

Keep the fauna spotter catcher within a position from which the active clearing area and machinery movement can be observed safely.

Clear in small, staged sections towards retained habitat where this is consistent with the approved plan, giving animals an opportunity to move away from machinery.

Use low ground speed and pause machinery whenever the fauna spotter catcher requests an inspection or identifies a possible animal or shelter feature.

Suspend clearing during conditions that reduce detection or increase animal welfare risks, including heavy rain, extreme heat or unsafe access, unless the approved plan provides a safe alternative.

  • Maintain exclusion fencing and no-go markers throughout the clearing period.
  • Keep machinery, vehicles and workers out of retained habitat and do not push cleared material into retained leaf litter or ground shelter.
  • Do not use fire to clear habitat or burn retained leaf litter, logs or grasses.

During habitat disturbance: Ground features and habitat handling

Inspect leaf litter, fallen debris, earth cracks, spider burrows and other likely shelter features before they are removed or covered.

Retain suitable ground cover and logs where they fall within the approved retained area. If a feature must be moved, handle it under the direction of the authorised fauna spotter catcher and place it in nearby retained suitable habitat where approved.

Do not unnecessarily lift, crush or drag ground debris across retained habitat, because the species is believed to shelter beneath debris, in earth cracks or in spider burrows.

Keep cleared material, spoil and stockpiles away from retained open forest, drainage lines and identified release areas.

  • Treat any small gecko, shed skin, burrow or shelter feature as a potential fauna trigger until assessed.
  • Use the approved fauna management plan for any relocation of shelter material or animals, including the nominated release area and welfare controls.

During habitat disturbance: Animal encounters and stop-work triggers

Stop work immediately in the affected section if a Yellow-snouted Gecko is found, injured, trapped, or suspected beneath machinery, debris or soil.

Only an appropriately authorised and experienced fauna spotter catcher should handle the animal, and handling should be limited to what is needed for identification, protection and approved relocation.

Place a live animal in a secure, suitable container only for the shortest practical period and keep it shaded, cool and protected from predators.

Relocate a healthy animal only under the relevant approval and fauna management plan, to nearby retained suitable habitat that is within the species' known habitat type.

Take injured animals to a veterinarian or authorised wildlife carer as soon as practicable and record the outcome.

Resume work only after the fauna spotter catcher has cleared the area and the project environmental officer has confirmed that the approved controls are in place.

  • Trigger a stop-work review if more than one animal is found, if animals are repeatedly found in the clearing area, or if the approved clearing limits or habitat controls are breached.
  • Record the location, date, time, condition, photographs, identification, handling, release or treatment details and the people involved for every encounter.
  • Notify the relevant regulator or approval authority when required by permit, approval or incident conditions.

After habitat disturbance: Post-clearance inspection

Post-clearance work must confirm that no animals remain in disturbed habitat, that retained habitat is protected and that the project has met its approval and reporting obligations.

Complete a fauna spotter catcher inspection of the cleared area and its edges before releasing the area to unrestricted construction activity.

Recheck retained leaf litter, ground debris, earth cracks and other shelter features disturbed during clearing.

Remove temporary exclusion fencing only when the environmental officer confirms that construction no longer threatens retained habitat or fauna movement.

  • Record the date, time, people involved, area inspected, conditions, findings and any animal encounters.
  • Keep any animal welfare, treatment, relocation and incident records with the project environmental records.

After habitat disturbance: Monitoring and controls

Monitor retained suitable habitat for damage from vehicles, soil movement, weeds, altered drainage and fire during construction and operation.

Inspect retained open forest for gamba grass, mission grass and other introduced pasture grasses, particularly where construction has disturbed soil or increased fuel continuity.

Maintain no-go areas, access controls and fire management measures for as long as they are required by the approval or fauna management plan.

  • Use repeat nocturnal searches if monitoring identifies suitable habitat degradation, new records, repeated fauna encounters or a change in fire or weed conditions.
  • Investigate any decline in leaf litter, increase in fire intensity or increase in introduced grass cover as a potential species management issue.

After habitat disturbance: Reporting and offsets

Provide the regulator, approval authority and relevant wildlife database with the records and compliance information required by the project approvals.

Report the area of habitat cleared, the area retained, survey effort, detections, injuries, relocations, incidents, weed controls and fire management actions.

Assess offsets or other compensatory measures where they are required by an EPBC approval, Northern Territory approval or other statutory condition. Any measure should address the species' restricted distribution, habitat loss, altered fire regimes and introduced pasture grasses.

  • Do not describe the species as absent solely because it was not detected during a short or poorly timed survey.
  • Retain maps and photographs showing pre-clearance habitat, clearing boundaries, retained areas and post-clearance condition.

Rehabilitation actions: Restore habitat structure

Rehabilitation should recreate the ground structure and open forest conditions used by the species, while reducing the risk of hotter fires, invasive pasture grasses and predation. Set objectives that can be measured over time.

Re-establish open forest structure using locally appropriate native species, including Darwin woollybutt, Eucalyptus miniata, and Darwin stringybark, Eucalyptus tetrodonta, where these species are suitable for the site.

Retain and reinstate native leaf litter, fallen branches and logs to provide ground shelter. Do not remove natural debris from rehabilitated areas unless required for safety or fire management.

Restore sandy red-loam ground conditions and natural drainage where construction has compacted, covered or displaced suitable substrate.

Maintain connected rehabilitated areas beside retained open forest rather than creating isolated narrow patches.

Preferred forest trees: Eucalyptus miniata and Eucalyptus tetrodonta

Important ground features: Well-developed leaf litter, grasses, ground debris, earth cracks and spider burrows

Recorded substrate information: Sandy red-loam substrates

  • Use locally collected or regionally appropriate native seed and plant material where available and permitted.
  • Do not introduce gamba grass, mission grass or other pasture grasses during rehabilitation works.
  • Do not install nest boxes for this species unless new evidence shows that it uses them, because the available documents describe ground shelter rather than tree hollows or nest boxes.

Rehabilitation actions: Fire, weeds and predators

Prepare and implement a fire regime that avoids frequent, intense late dry-season fires in retained and rehabilitated habitat.

Control gamba grass, mission grass and other introduced pasture grasses before they increase fuel loads and fire intensity.

Manage construction waste, food and other attractants that may increase feral or native predator activity around retained habitat.

Use weed and fire controls that protect leaf litter and ground shelter rather than removing the habitat features needed by the gecko.

Reported fuel effect of exotic grasses: Fuel loads increased three to five times in studied open forests

Reported fire effect: Fire intensities increased eight-fold relative to comparable open forests with native grasses

  • Inspect rehabilitated areas before and after the fire season for invasive grasses and loss of leaf litter.
  • Coordinate fire planning with the land manager and relevant Northern Territory conservation authorities.
  • Record fire occurrence, weed cover and control actions in the rehabilitation monitoring database.

Rehabilitation actions: Monitoring and success measures

Monitor plant establishment, native leaf-litter cover, ground debris, weed cover, fire effects, connectivity and habitat condition in rehabilitated and retained areas.

Use nocturnal spotlight searches in suitable rehabilitated habitat during late spring and early summer, from sunset to the first three hours after dark, when monitoring for recolonisation or continued occupancy.

Use consistent transects, search times, weather records and observer details so results can be compared between monitoring events.

Treat a failure to detect the species as inconclusive unless the survey effort and conditions are adequate for this cryptic, low-density gecko.

Historical population indication: Only 10 individuals were reported from about 22,000 trap-nights, with no mark and recapture estimate available

Recommended monitoring method: Nocturnal walking spotlight searches, supported by pitfall trapping only where justified

  • Set project-specific success measures for native tree establishment, continuous leaf litter, retained ground shelter, absence or controlled cover of introduced pasture grasses and protection from high-intensity fire.
  • Record any Yellow-snouted Gecko detection with a colour photograph, coordinates, habitat description and confirmation by the relevant fauna authority or museum.
  • Review rehabilitation methods if monitoring shows declining leaf litter, increasing exotic grass cover, repeated fire damage or continuing habitat fragmentation.

Sources