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Bronzeback Snake-lizard (Ophidiocephalus taeniatus)

The Bronzeback Snake-lizard is a small, fossorial, legless lizard restricted to arid central Australia, with records from the Northern Territory and South Australia. On development sites, the main concern is disturbance or removal of deep, undisturbed leaf litter mats and the loose soil beneath them, particularly along ephemeral drainage lines and beneath suitable Acacia shrubs.

Conservation status

Commonwealth, EPBC Act 1999: Vulnerable.

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

Breeding season

The Bronzeback Snake-lizard is an egg-laying, fossorial reptile. Mating is thought to occur in early spring, with eggs laid before January. Clearing can damage litter mats, loose soil and underground shelters throughout the year, with higher risk during spring and summer breeding and movement periods.

Reproductive mode: Egg laying, or oviparous

Clutch size: Two eggs

Incubation: Not recorded for the Bronzeback. Pygopodids generally have an incubation period of 66 to 77 days.

Size at hatching: Not recorded

Age at maturity: Not recorded

Nest or egg sites: Not recorded. Eggs are likely to be placed in or near protected leaf litter and loose soil.

Breeding frequency: Not recorded

Confirm timing locally before works, particularly after rainfall and where temperature, intact litter mats and loose soil indicate suitable shelter or breeding habitat.

  • Mating: Mating is thought to occur in early spring, corresponding to September in southern Australia. The exact timing may vary with local temperature and rainfall, and no full range of mating months is recorded.
  • Gravid females: The timing of gravid females has not been recorded for this species. As a planning measure, females may carry eggs from mating in early spring until laying before January, with the greatest likelihood in October to December.
  • Egg laying: The species is thought to lay two eggs before January. The documents do not identify a more precise month, so September to December is shown, with no confirmed monthly peak.
  • Incubation: Incubation length and nest conditions are not recorded for the Bronzeback. Pygopodids generally incubate eggs for 66 to 77 days, so eggs laid before January may remain in protected litter or loose soil into summer.
  • Hatchlings: Hatching and juvenile emergence are not recorded for this species. Applying the general pygopodid incubation period of 66 to 77 days to eggs laid before January indicates that young may emerge from December to March.
  • Active period: No species-specific active season has been recorded. Activity and movement are expected to increase after rain and in warmer months, particularly from October to December, while the species is generally surface active at night or around dusk and dawn.
  • Winter inactivity: Brumation is not recorded, but activity is expected to be lower during the coldest months. From June to August, and especially in southern or cooler parts of the range, animals may remain beneath litter mats or in loose soil where they cannot readily escape machinery.
  • Highest clearing risk: Risk is highest from September to December, when mating, gravid females, egg laying and increased movement may overlap. Eggs and newly emerged young may extend the risk into January to March, while disturbance to litter mats and soil remains harmful in every month.

Identification

The Bronzeback is a small, snake-like pygopodid with no external forelimbs and only small hindlimb flaps. It is secretive and fossorial, so most records are made when suitable litter mats are carefully searched rather than by observing animals on the surface.

The upper body is bronze or rich fawn. The head and underparts are pale grey to greyish brown. A broad dark-brown band runs from the snout along each side of the body to the tail tip, and the ventral and lower lateral surfaces have a reticulated pattern formed by pale scale margins.

The snout is blunt and wedge-shaped in profile. The tail is long and blunt-ended, and may be longer than the body. Like other pygopodids, the species can shed its tail and may produce a high-pitched squeak when handled or stressed.

Snout to vent length: Up to 102 mm

Total length: Up to about 270 mm

Body form: Completely limbless externally apart from small pygopodid hindlimb flaps

Weight: Not reported in the supplied sources

Identification: Distinguishing features

In the central Australian part of its range, the Bronzeback is the only completely limbless burrowing lizard reported from the adjacent regions, although it has the small hindlimb flaps typical of pygopodids. This helps separate it from snakes and from other lizards that retain obvious limbs.

Identification should not rely on colour alone because the animal may be partly covered in soil or litter. Photograph the dorsal, lateral and ventral surfaces where possible, and submit a good quality colour photograph and location details to the relevant state or territory fauna authority and museum for confirmation.

  • Do not identify a suspected Bronzeback from a brief view of a moving animal alone.
  • Record the presence of the small hindlimb flaps, the bronze or fawn back, the dark lateral bands and the blunt wedge-shaped snout.
  • Minimise handling because the tail can be shed and the litter mat may be damaged during capture.

Identification: Field signs

Reliable field signs are limited. The species lives within deep leaf litter and loose soil, so it is unlikely to leave conspicuous tracks, scats or surface trails. Its high-pitched squeak is a handling or stress response rather than a reliable survey call.

The most useful field indication is suitable, intact habitat: a deep, loose and relatively undisturbed leaf litter mat over sandy loam at the base of an Acacia shrub, especially beside an ephemeral drainage channel. Absence from a surface inspection does not demonstrate absence.

  • Treat intact litter mats as potential habitat even when no animal, track or scat is visible.
  • Avoid broad raking during routine fauna checks because raking can damage the habitat and is the recognised detection method for this species.
  • Use photographs and museum or fauna authority confirmation for suspected records.

Distribution: National range

The Bronzeback has a highly restricted and patchy distribution in central Australia. It is known from the Northern Territory and South Australia, with two disjunct areas separated by the Perdika Desert.

In South Australia, records extend from near the Northern Territory border, including the Abminga area, south towards Coober Pedy. In the Northern Territory, the species occurs in central Australia, including the Beddome Ranges area, with records associated with ephemeral drainage channels through stony gibber plains and areas of shale and siltstone mesas.

The species is not known from any other Australian state or territory. The supplied sources do not provide a confirmed elevational range.

  • Northern Territory: central Australian localities near the Northern Territory and South Australia border and the Beddome Ranges area.
  • South Australia: several localities extending south from Abminga towards the Coober Pedy region.
  • Bioregional context: the Stony Plains bioregion includes Coober Pedy and supports gidgee, mulga and other Acacia woodlands.

Distribution: Known subpopulations and trend

The Northern Territory Government describes two disjunct areas of occurrence. The northern area straddles the Northern Territory and South Australia border, while the second area is more than 130 km farther south in central South Australia. No NT conservation reserve has a reported record.

The species was first collected in the 1880s or 1890s, then was not recorded again until 1978 in South Australia and 2008 in the Northern Territory. Local abundance may fluctuate substantially with climate and habitat conditions. A population estimate and national trend are not available in the supplied sources.

Number of disjunct areas: Two

Separation between the two areas: More than 130 km

Population size: Not known

Population trend: Not quantified; local declines and fluctuations have been reported or inferred

NT conservation reserves with records: None reported

  • Known strongholds are associated with intact litter mats beneath Acacia shrubs near ephemeral drainage systems.
  • Litter mats on elevated creeklines may act as source areas after flood events damage downstream mats.
  • Do not treat the absence of a recent record as evidence that a suitable site is unoccupied.

Habitat: Vegetation and landform

The Bronzeback is an arid-zone specialist associated with Acacia-dominated open woodland, ephemeral drainage systems and intact litter mats over loose soil. Habitat condition at the fine scale is more informative than vegetation type alone.

The species typically occurs along temporary watercourses lined by gidgee open woodland. In the Northern Territory it has been recorded in Acacia-dominated open woodlands with a low, open shrub understorey, near ephemeral drainage channels that dissect stony gibber plains and areas of shale and siltstone mesas.

Records have been associated with litter beneath Acacia aneura, Acacia cambagei, Acacia latzii and Acacia sibirica. A South Australian record beneath mulga was about 8 km from the nearest major watercourse but near a small braided waterway, indicating that suitable habitat can occur away from a major channel.

  • Prioritise ephemeral creeklines, braided waterways and temporary drainage channels.
  • Map gidgee and mulga open woodland, other Acacia shrublands and the location of intact litter mats.
  • Include suitable litter mats on open rocky plains where a small waterway or drainage feature is nearby.

Habitat: Habitat structure

The key structure is deep, loose, undisturbed leaf litter over loose sandy loam or sandy clay loam. The soil may be well drained and deeply cracking. Litter mats at the base of trees or shrubs provide the interface between the surface overburden and the soil used for shelter and movement.

Suitable habitat can be lost without clearing the overstorey. Trampling, vehicle movement, soil compaction, erosion, flood deposition and removal of leaf litter can all reduce habitat quality.

Typical soil: Loose sandy loam or sandy clay loam, including well drained deep cracking soils

Key ground cover: Deep, loose and undisturbed leaf litter

Elevation limit: Not reported

Climate setting: Arid central Australia with hot, dry periods and low, unpredictable rainfall

  • Retain the full litter mat, the underlying soil and the supporting tree or shrub where possible.
  • Keep plant and vehicle access out of litter mats and avoid stock concentration near suitable drainage lines.
  • Inspect both sides of ephemeral channels and nearby braided drainage features, not only the active channel bed.

Foraging habitat: Diet

The Bronzeback forages within or close to its litter and soil shelter. Its diet is based mainly on small invertebrates, with reports also indicating that it can take small reptiles.

Recorded or reported prey includes termites, cockroach nymphs, moth larvae, beetle larvae and spiders. A South Australian information sheet also reports that the species takes small reptiles and can consume surprisingly large prey.

The supplied sources do not identify particular food plants or provide a measured foraging range or home range.

Main prey: Termites, cockroach nymphs, moth and beetle larvae, and spiders

Additional prey: Small reptiles have been reported as prey

Foraging range: Not known

Foraging method: Likely active searching within litter, loose soil and associated tunnels; species-specific observations are limited

  • Retain litter mats and loose soil because they support the invertebrates and small reptiles used as prey.
  • Avoid disturbing the bases of Acacia shrubs, where shelter and prey are likely to be concentrated.
  • Do not infer that a site is unsuitable because prey is not visible during a daytime inspection.

Breeding habitat: Breeding biology

Breeding biology is poorly known. Available information indicates an oviparous species that uses the same litter and loose-soil habitat required for shelter and feeding.

The species is thought to mate in early spring and lay two eggs before January. The eggs are likely to be placed in or near protected litter and loose soil, but the precise nest site and incubation conditions have not been documented in the supplied sources.

General pygopodid information indicates that temperate species often mate in spring and lay in summer, with a normal clutch size of two and incubation of 66 to 77 days. These family-level values should not be treated as confirmed measurements for the Bronzeback.

Breeding season: Thought to mate in early spring and lay eggs before January

Clutch size: Two eggs are reported for the species

Incubation: Not known for the Bronzeback; 66 to 77 days is reported for pygopodids generally

Age at maturity: Not reported

Lifespan: Not reported for the species

  • Avoid clearing or heavily disturbing suitable litter mats during the likely breeding period from early spring to early summer.
  • Retain deep litter and loose soil beneath suitable shrubs because the species' egg-laying sites have not been described precisely.
  • Use a species specialist and the relevant fauna authority to determine an appropriate response if an animal is found during works.

Breeding habitat: Breeding habitat

No separate breeding habitat has been identified. The most defensible assumption for planning is that breeding occurs within the species' occupied litter mats and associated loose soil, particularly under Acacia shrubs near temporary drainage features.

  • Treat intact litter mats as potential breeding habitat where the species' range and habitat occur.
  • Do not remove litter, grade soil or compact the ground beneath suitable Acacia shrubs without first assessing the site for the species.
  • Maintain undisturbed habitat on elevated creeklines because these areas may remain suitable when floodwater affects lower litter mats.

Sheltering habitat: Shelter features

The Bronzeback is fossorial and spends most of its time beneath litter or in the soil below litter mats. Its shelter is readily damaged by trampling, vehicle traffic, earthworks and flood-borne sediment.

The species inhabits deep leaf litter underlain by loose sandy loam at the base of a tree or shrub. In the Northern Territory, records have been made beneath litter mats associated with four Acacia species: Acacia aneura, A. cambagei, A. latzii and A. sibirica.

Pygopodid species in general can burrow through loose soil, narrow earth cracks and insect tunnels. The Bronzeback has been described as using loose sandy loams, but the dimensions and depth of individual burrows have not been reported.

Shelter type: Deep leaf litter mats over loose sandy loam or sandy clay loam

Shelter location: Usually at the base of an Acacia tree or shrub

Burrow dimensions: Not reported

Known host shrubs: Acacia aneura, A. cambagei, A. latzii and A. sibirica in the Northern Territory

  • Mark and protect deep litter mats before clearing, vehicle access or construction begins.
  • Protect the soil beneath the mat as well as the litter surface.
  • Avoid raking, turning or stockpiling litter because these actions can destroy shelter and make detection or recolonisation less likely.
  • Treat apparently isolated mats as habitat because records can occur away from major watercourses.

Sheltering habitat: Survey and handling implications

Raking litter mats is the recognised method for detecting the species, and searches have been most successful after rain the previous night. The method can cause considerable damage to habitat, and the Northern Territory Government notes that no suitable non-damaging survey method is currently available.

The species has not been recorded in pitfall traps set in areas where it was successfully detected by hand searching. A negative pitfall result therefore does not demonstrate absence.

  • Use an experienced reptile ecologist to design any litter search and limit the area disturbed.
  • Search after suitable rainfall where practicable, with emphasis on late spring and early summer activity.
  • Photograph suspected animals and seek confirmation from the South Australian Museum, Northern Territory Museum or relevant fauna authority.
  • Reinstate disturbed litter mats immediately after a search where this can be done without further harm.

Threats: Clearing and construction

The main risks are loss and degradation of litter mats and the loose soil beneath them. Because the species has a small, patchy distribution and a limited detection rate, local damage may be difficult to identify or quantify.

Clearing Acacia open woodland, removing shrubs, stripping leaf litter, grading drainage lines and excavating soil can directly remove habitat. Roads, tracks, pipelines, pads and other linear works can fragment litter mats and increase vehicle access to previously undisturbed areas.

Ground disturbance may also change surface flow, increase erosion and deposit silt over litter mats. A site assessment should map individual mats and the drainage features that support them rather than relying only on broad vegetation mapping.

  • Avoid clearing suitable Acacia woodland and intact litter mats wherever practicable.
  • Fence exclusion areas before machinery, workers and stock enter the site.
  • Keep laydown areas, access tracks, spoil and vehicle turning areas away from litter mats and ephemeral drainage lines.
  • Do not use a lack of surface observations as the basis for clearing a suitable mat.

Threats: Grazing, trampling and soil damage

Cattle can trample litter mats along watercourses. Feral horses and camels have also damaged mats away from bores. Trampling reduces litter depth and compacts the underlying soil, while grazing can reduce vegetation cover and increase erosion.

The Northern Territory Government reported no Bronzebacks beneath litter mats trampled by livestock during a 2008 survey, and noted that cattle had reduced the amount of suitable habitat.

  • Control stock access to occupied or potentially occupied litter mats.
  • Prevent heavy vehicle traffic over litter mats and loose sandy soils.
  • Manage feral herbivore access where it threatens litter retention, soil structure or vegetation cover.

Threats: Flooding and hydrology change

Flood events can strip away surface soil and leaf litter or cover mats with silt. These effects may be worsened by reduced vegetation cover, soil compaction and erosion. Litter mats on elevated creeklines may be less affected and may provide source areas after downstream habitat is damaged.

Changes to drainage, culverts, road crossings, artificial watering points or runoff patterns can alter erosion and sediment movement around suitable habitat.

  • Avoid concentrating runoff onto litter mats or the bases of shrubs.
  • Design crossings and drainage controls to maintain natural flow paths and limit scour and sediment deposition.
  • Inspect habitat after major flood events and record mats that have been washed away or buried.

Threats: Fire, predators and disease

The supplied sources do not identify a species-specific fire regime, disease or predator threat for the Bronzeback. Fire that removes litter mats or changes the Acacia understorey could reduce shelter, but the effects of particular fire frequencies or intensities have not been established.

The broader pygopodid family is preyed on by raptors, snakes, goannas, feral cats and foxes. The sources do not quantify the importance of these predators for Bronzeback populations.

  • Avoid burning or removing deep litter mats in potential habitat unless required for a documented safety or ecological reason.
  • Record fire history and litter recovery when assessing a site, but do not apply an untested species-specific fire threshold.
  • Control feral cats and foxes where this forms part of an approved fauna management programme.
  • Treat disease risk as unknown and report unusual mortality or clinical signs to the relevant wildlife authority.

Survey methodology: 1. Target habitat assessment

The Bronzeback Snake-lizard is a secretive, fossorial pygopodid that is difficult to detect. Survey effort should focus on deep, loose leaf-litter mats beneath gidgee and mulga near temporary drainage lines, with careful control of habitat disturbance during searches.

Map temporary watercourses, ephemeral drainage channels, gidgee and mulga open woodland, deep cracking soils, sandy loam and intact leaf-litter mats before selecting search sites.

Prioritise litter mats at the base of Acacia aneura, A. cambagei, A. latzii and A. sibirica where these shrubs occur in the Northern Territory, and inspect similar gidgee or mulga habitat in South Australia.

Include nearby braided waterways and suitable litter beneath mulga on open rocky plains, because records show that the species can occur away from a major watercourse.

Known range: Several localities from Abminga, just south of the Northern Territory and South Australia border, south to near Coober Pedy, with two disjunct areas in central Australia.

Key microhabitat: Deep, loose, undisturbed leaf litter over loose sandy loam, commonly at the base of trees or shrubs.

Survey methodology: 2. Targeted leaf-litter searches

Use careful hand searching and raking of suitable sheltering sites as the primary detection method for this species.

Search the interface between the leaf-litter overburden and soil in the late afternoon and early morning, when the species is likely to be closer to the surface.

Rake litter progressively and carefully, exposing the soil surface without removing or dispersing more litter than needed to confirm presence or absence.

Where possible, search after rain, because searches at Arckaringa were most successful after rain the previous night.

Use experienced personnel who can identify the species and limit damage to litter mats, because raking is currently the only suitable survey method identified for the Northern Territory and can damage habitat.

Likely peak activity: Late spring and early summer.

Seasonal activity: Probably year round except during the coldest months.

Survey methodology: 3. Nocturnal and crepuscular searches

Use targeted searches at night as a supplementary method along suitable litter mats, temporary drainage channels and nearby sheltering sites.

Schedule searches from late afternoon through the evening and into early morning, because the species is probably crepuscular or nocturnal and is not normally active on the ground surface by day.

Do not rely on open-ground spotlighting alone, because the species is fossorial and usually remains within deep leaf litter or the underlying soil.

Expected surface behaviour: Individuals may move between sheltering sites at night, but are generally concealed in litter and soil.

Survey methodology: 4. Pitfall trapping and other methods

Do not use pitfall trapping as the primary survey method for the Bronzeback Snake-lizard, because the species has not been recorded in pitfall traps at sites where hand searches detected it.

Use pitfall traps only where a suitably qualified ecologist can justify them for other target reptiles and where the design, checking frequency, animal welfare controls and approvals are documented.

Treat a negative pitfall result as weak evidence of absence for this species.

Survey methodology: Minimum effort and reporting

  • Define the survey area, habitat strata, search dates, start and finish times, weather, recent rainfall, personnel, search method, area searched and disturbance caused to each litter mat.
  • Survey suitable habitat during late spring or early summer where practicable, and include a search after rain where site conditions and safety allow.
  • Use repeat or multi-year surveys where one season cannot provide adequate detection confidence, particularly where local abundance may fluctuate with climate and habitat condition.
  • Record all positive and negative searches with GPS coordinates, habitat photographs and the condition of the litter mat and soil.
  • Support every potential record with a good quality colour photograph and submit the photo voucher to the relevant state fauna authority and the South Australian Museum or Northern Territory Museum for confirmation and databasing.
  • Submit confirmed records and survey results to the relevant state or territory wildlife database and provide records through the project approval reporting process.
  • Retain the survey data, photographs, search tracks, habitat maps and disturbance records with the project environmental file.

Before habitat disturbance: Avoid and minimise

Before clearing or construction, treat intact leaf-litter mats, temporary watercourses and the associated sandy loam soil as potential Bronzeback habitat. The species is listed as Vulnerable under the EPBC Act and Endangered in the Northern Territory.

  • Redesign the work footprint to retain temporary watercourses, ephemeral drainage channels, gidgee and mulga woodland, deep cracking soils and intact leaf-litter mats.
  • Retain connected patches of suitable litter and soil between drainage lines and nearby woodland rather than isolating small mats within the work area.
  • Establish no-go areas and site-specific buffers around confirmed records and suitable litter mats, with the extent set by the project ecologist and approval conditions.
  • Prevent vehicle access, laydown, trenching, stockpiling and spoil placement on retained litter mats and drainage lines.
  • Avoid activities that compact soil, remove surface litter, alter drainage or increase erosion around retained habitat.

Before habitat disturbance: Approvals and work planning

  • Check whether the action may significantly affect this EPBC-listed species and obtain project-specific advice on referral or approval under the EPBC Act before work starts.
  • Check Northern Territory and South Australian wildlife legislation, permit requirements and fauna handling authorisations for the project location.
  • Prepare a fauna management plan that identifies habitat, survey methods, authorised handlers, stop-work triggers, release sites, injury response and reporting requirements.
  • Plan clearing outside the coldest months where practicable, and favour late spring or early summer survey and clearance planning when activity is more likely to be detected.
  • Stage works so that retained habitat remains connected and machinery does not progressively isolate litter mats or block temporary drainage.

Before habitat disturbance: Site preparation

  • Complete a pre-clearance habitat inspection and targeted Bronzeback survey before machinery enters suitable habitat.
  • Mark retained watercourses, litter mats, trees and shrubs with visible exclusion markers that can be seen by operators and spotter catchers.
  • Install exclusion fencing where it can prevent machinery, vehicles and stock from entering retained habitat without causing erosion or diverting surface flows.
  • Brief all operators on the species, its appearance, its fossorial habit, the no-go areas and the instruction to stop when a potential individual is found.
  • Confirm that the fauna spotter catcher is authorised, suitably experienced with fossorial pygopodids and carrying the required permits and emergency contacts.

During habitat disturbance: Daily controls and machinery supervision

Clearance should proceed slowly and under direct environmental control. The main risk is damage to the leaf-litter and soil habitat, including trampling, compaction, erosion and removal by machinery.

  • Inspect exclusion fencing, no-go markers, drainage controls and retained litter mats at the start of each workday and after heavy rain.
  • Keep machinery and vehicles outside marked habitat and use the smallest practical work area for each stage of construction.
  • Use a fauna spotter catcher to walk the active edge of clearing, watch exposed litter and soil, and maintain direct communication with the machine operator.
  • Clear progressively in short sections so the spotter catcher can inspect disturbed material before the next section is removed.
  • Stop work if machinery contacts a retained litter mat, temporary watercourse, confirmed habitat area or exclusion fence.

During habitat disturbance: Handling habitat and fauna

  • Do not rake, remove or stockpile intact litter mats during construction unless the action is part of an approved fauna management method and is supervised by the authorised ecologist.
  • Do not move soil, litter, logs, rocks or other shelter material from retained habitat into the work area or onto drainage lines.
  • Treat any exposed crack, loose sandy loam pocket or litter mat as potential habitat until inspected by the fauna spotter catcher.
  • Do not handle a Bronzeback unless the handler is authorised and the action is necessary for fauna safety, identification or approved relocation.
  • Place a captured individual in a secure, ventilated container with suitable clean substrate, keep handling time as short as possible and prevent overheating, desiccation and escape.
  • Relocate an animal only to nearby retained habitat that matches the source microhabitat and is approved in the fauna management plan.
  • Take a clear colour photograph without delaying release, unless a qualified person considers the animal requires examination.

During habitat disturbance: Finds, injuries and stop-work triggers

  • Stop the machine and establish a safe exclusion zone immediately if a potential Bronzeback is found.
  • Have the fauna spotter catcher confirm the identification or arrange confirmation through the relevant state fauna authority or museum.
  • Stop work in the affected habitat until the animal has been safely managed and the ecologist has confirmed that work can resume.
  • Take injured animals to an appropriately equipped veterinarian or wildlife carer under the project fauna procedure.
  • Record the date, time, GPS location, photograph, habitat condition, activity underway, machine involved, action taken, release location and the names of authorised personnel.
  • Report any mortality, habitat mat destruction, erosion event or unapproved disturbance immediately to the project environmental officer and the relevant approval authority.

After habitat disturbance: Post-clearance checks

Post-clearance work should confirm that retained habitat has not been damaged and that controls remain effective. A negative observation after construction does not demonstrate that the species is absent.

  • Inspect the full disturbance edge and retained habitat for damaged or removed litter mats, soil compaction, sediment deposition, altered drainage and erosion.
  • Check temporary watercourses and elevated creekline litter mats after rainfall and flooding, because surface flows can wash away or bury suitable litter.
  • Remove spoil, waste, fencing and vehicle tracks from retained habitat where this can be done without further disturbing the litter or soil.
  • Repeat targeted searches where the project has disturbed suitable habitat and the approved monitoring plan requires confirmation of fauna outcomes.
  • Photograph and map the final condition of retained habitat and compare it with the pre-clearance record.

After habitat disturbance: Monitoring and reporting

  • Monitor retained litter mats, drainage lines and nearby gidgee or mulga woodland at the intervals set by the approval or fauna management plan.
  • Use the same search areas, timing, weather information and recording methods across monitoring events so results can be compared.
  • Maintain exclusion fencing, erosion controls and no-go markers until the environmental officer confirms that the work area is stable and no longer poses a risk.
  • Update the state or territory wildlife database with confirmed records, negative survey results, injuries, mortalities, habitat damage and relocation details.
  • Provide EPBC and state approval reports by the required deadlines, and retain all photographs, GPS data, search effort and incident records.

After habitat disturbance: Offsets and corrective action

  • Apply any offset, rehabilitation or compensatory habitat requirement imposed under the EPBC Act or state approval.
  • If retained habitat is damaged, notify the approval authority, stabilise the site without burying or removing remaining litter mats, and obtain ecologist advice before further repair.
  • Review the work method after any mortality, repeated litter-mat damage or erosion event and amend controls before the next construction stage.

Rehabilitation actions: Recreate habitat structure

Rehabilitation should recreate the species' shelter and soil conditions rather than only replacing vegetation. The target is a connected set of undisturbed litter-rich microsites near temporary drainage features.

  • Retain and protect existing gidgee and mulga trees and shrubs wherever possible, including Acacia aneura and other Acacia species associated with Northern Territory records.
  • Plant locally appropriate gidgee and mulga where clearing has removed the open woodland structure, using species and provenance approved for the site.
  • Reinstate deep, loose leaf litter beneath established shrubs and trees using clean, local material that is free of weeds, rubbish and contaminants.
  • Avoid compacting the sandy loam and deep cracking soil needed beneath litter mats, and exclude vehicles, stock and repeated foot traffic while the habitat develops.
  • Do not use nest boxes or hollow-bearing tree replacement as a substitute for leaf-litter and soil habitat, because the Bronzeback is fossorial and its documented shelter is beneath litter mats.

Rehabilitation actions: Drainage, erosion and grazing controls

  • Restore temporary drainage lines and natural surface-flow paths so that rehabilitation does not concentrate water across litter mats.
  • Stabilise erosion with methods that retain surface litter and avoid burying suitable soil with silt or spoil.
  • Fence or otherwise protect rehabilitated litter mats from cattle, feral horses, feral camels and other herbivores until vegetation and litter structure are established.
  • Control weeds and avoid introducing materials or practices that reduce native woodland cover or leaf-litter accumulation.
  • Manage adjacent construction drainage so flood flows do not strip litter mats or deposit sediment over them.

Rehabilitation actions: Monitoring and success measures

  • Inspect rehabilitation after rainfall and flooding for litter loss, sediment cover, soil compaction, erosion and damage by stock or feral herbivores.
  • Measure progress using mapped native gidgee or mulga cover, intact leaf-litter mats, suitable loose soil, stable drainage lines and the absence of vehicle or livestock damage.
  • Use repeat targeted litter searches during late spring and early summer, including after suitable rainfall where safe, to assess whether the rehabilitated habitat is being used.
  • Continue monitoring for the period required by the approval and extend it if habitat structure has not stabilised or if monitoring detects continuing threats.
  • Submit any Bronzeback record with a good quality colour photograph to the relevant state fauna authority, museum and wildlife database, and report rehabilitation outcomes through the project approval process.

Sources