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Brown Brood Frog (Pseudophryne bibronii)

The Brown Brood Frog, also called Bibron’s Toadlet, is a small terrestrial breeding frog of south-eastern Australia. It lays eggs in moist soil and leaf litter beside ephemeral pools, so clearing, drainage, soil disturbance, sediment movement and loss of ground cover can affect both breeding sites and nearby sheltering habitat on development sites.

Conservation status

Victoria, Flora and Fauna Guarantee Act 1988: Endangered.

Breeding season

Brown Brood Frogs breed in shallow terrestrial nests after autumn rain. Eggs remain in the nest until flooding releases tadpoles into temporary pools, with metamorphosis mainly in spring. Clearing, draining and dewatering should be planned around both the breeding patch and nearby shelter.

Reproductive mode: Terrestrial egg laying with external fertilisation in shallow nests. Flooding triggers hatching, after which tadpoles develop in temporary pools.

Clutch size or Litter size: About 47 eggs per female on average, with a reported range of 26 to 78. Females may divide eggs among the nests of up to eight males.

Incubation or Gestation: About 4 to 5 months in the nest, with development suspended until flooding. Other profile information reports 3 to 7 months where inundation is delayed.

Size at hatching or birth: Not recorded.

Age at maturity: Females are thought to first reproduce at less than 2 years of age.

Nest or egg sites: Moist soil depressions or shallow burrows under leaf litter, vegetation, logs, rocks or woody debris, usually in dry creek lines, drainage pans and other ephemeral drainage features above the normal water level.

Breeding frequency: Not recorded.

Confirm timing locally using recent rainfall, temperature, known breeding-patch records and pre-clearance surveys, because flooding and calling can extend beyond the core months.

  • Calling: Males call from February to August, especially after heavy rain. Calling and nest establishment are concentrated in the March to June breeding period, and males may remain at nests for 3 to 5 months.
  • Egg laying: Egg laying occurs from March to June in shallow terrestrial nests. Females may divide a clutch among the nests of two to eight males, with up to eight males reported.
  • Tadpoles: Eggs remain in the nest until heavy rain floods it and hypoxia triggers hatching. Tadpoles develop in shallow temporary pools over winter and into early spring, mainly from June to August.
  • Metamorphs: Metamorphosis occurs mainly in September and October, when temporary pools begin to dry. Some metamorphosis may extend into early summer, with young moving into surrounding bushland after leaving the water.
  • Active period: Adults move to breeding sites after significant autumn rain and remain there during the 3 to 5 month breeding period. After metamorphosis, young and adults move through surrounding bushland and shelter under leaf litter, rocks and logs.
  • Winter inactivity: No formal hibernation or brumation period is recorded. As general guidance for a temperate terrestrial frog, expect frogs to remain concealed under leaf litter, logs, rocks and other damp cover during colder winter conditions, while tadpoles occupy temporary pools.
  • Highest clearing risk: Risk is highest from March to October, when calling males, terrestrial eggs, flooded nests, tadpoles and metamorphs may be present. Risk remains elevated in November where young frogs are moving into bushland, and clearing can also remove shelter outside the breeding period.

Identification

The Brown Brood Frog is a small, short-legged ground frog that usually walks rather than hops. Call, belly pattern and the orange or yellow patches at the bases of the arms are useful field characters, but appearance can vary between individuals.

Adults are brown to black above, with darker flecks and sometimes red spots. The back is mostly smooth with small, low warts. The underside is marbled black and white, or black, grey and white, and may include a yellow patch around the vent. An orange or yellow patch is consistently present at the base of each arm.

Size: Male 22 to 30 mm; female 25 to 32 mm.

Weight: Not reported.

  • The toes lack pads and are not webbed. The species generally walks rather than hops.
  • Males are about 22 to 30 mm long and females about 25 to 32 mm long. Females are slightly larger.

Identification: Call and similar species

Males call from inside or near the entrance of a nest or shallow burrow, particularly after heavy rain. The call is a short, harsh or grating “cre-ek” or “ark”, repeated at intervals.

  • A faded or blurred grey and white belly can resemble the Common Froglet, Crinia signifera. Check the orange or yellow arm-base patch, lack of toe pads, overall body form and call.
  • The Brown Brood Frog’s call may be confused with the Common Froglet’s male aggression call or intermittent call. Acoustic identification is recommended where visual characters are unclear.

Identification: Field signs

Breeding males may be located by their calls from shallow nests in dry creek lines, drainage pans, or damp ground beside swamps, creeks and ditches. Nests are shallow soil depressions or burrows under leaf litter, vegetation, rocks, logs or woody debris.

  • Look for moist, partly composted leaf litter and grassy debris around ephemeral creek edges, depressions, temporary pools and drainage lines.
  • Eggs are large, pigmented and may be coated in soil or mud. They are laid in loose clumps in moist soil above the usual water level.
  • Tadpoles occur in shallow temporary pools formed when the nest is inundated. No tracks, scats, sloughs or eyeshine are expected field signs for this species.

Distribution: National range

The Brown Brood Frog is distributed across south-eastern Australia, but the supplied sources do not provide a complete IBRA bioregion list. Records and descriptions indicate a broad former range with local declines and local extinctions in parts of that range.

The reported range extends through south-eastern Queensland, eastern New South Wales, Victoria, south-eastern South Australia and Tasmania. The species occurs in temperate regions of south-eastern Australia.

  • Named IBRA bioregions are not provided in the supplied sources, so site assessment should use current state records and targeted local survey data rather than infer bioregion presence from the broad range.
  • The species is recorded in both coastal and tableland settings, including open forest, woodland, heathland and grassland.

Distribution: Known strongholds and subpopulations

In the Adelaide and Mount Lofty Ranges, significant subpopulations were reported in Belair National Park, Scott Creek Conservation Park, Horsnell Gully Conservation Park, Morialta Conservation Park and Para Wirra Conservation Park. The same source describes post-1983 records along the Mount Lofty Ranges spine, from Kaiserstuhl Conservation Park to near Mount Magnificent and Deep Creek Conservation Park, with a concentration around Para Wirra and Mount Crawford.

  • A monitored population at Wrights Beach in the Jervis Bay region of New South Wales used three breeding patches associated with intersecting ephemeral creek lines: north creek, east creek and south creek.
  • The North Central Catchment Management Authority guide identifies the species as occurring in its Victorian region and lists it as Endangered in Victoria.

Distribution: Population trend

The species is described as decreasing across its range, with reports of local declines and population extinctions. In the Adelaide and Mount Lofty Ranges, the extent of occurrence appears to have contracted compared with pre-1983 records, although the source states that it remains uncertain whether populations are stable or continuing to decline.

Reported population estimate: No national estimate supplied.

South Australian survey result: More than 10 calling males were reported in several named subpopulations in 2009.

Trend: Population decrease, local declines and local extinctions reported; current stability remains uncertain in some regions.

  • The supplied sources do not provide a national population estimate.
  • The South Australian source reports more than 10 calling males in several subpopulations, but does not provide a total population size.

Habitat: Habitat types

The Brown Brood Frog uses terrestrial habitat for most of its life and depends on temporary water bodies for larval development. Suitable habitat combines damp ground, leaf litter or grassy debris, sheltering cover and nearby ephemeral inundation.

Adults use dry forest, woodland, shrubland, heathland and grassland, particularly where low-lying depressions or drainage features become wet after rain. In the New England and lower New England assessment, breeding habitat is described as swamps or bogs in open forest on tablelands and the coast, including ephemeral water bodies.

  • Suitable sites may occur beside ephemeral creeks, dry creek lines, drainage pans, swamps, temporary dams, vegetated roadside drains and ditches.
  • The species was formerly found in cleared agricultural areas in the assessed New South Wales region, but the source states that it is now found only in undisturbed areas there.

Habitat: Structural features

Important ground features include deep or moist leaf litter, partly composted grassy debris, logs, rocks, stones, damp humic soil and low vegetation. Breeding sites need shallow depressions or nest locations that can be inundated after rainfall but are not permanently wet.

  • Retain connected ground cover between breeding depressions and surrounding woodland, heath or grassland.
  • Avoid treating temporary pools, wet depressions and vegetated drains as having low habitat value simply because they are dry during a site inspection.

Habitat: Climate and elevation

The supplied sources describe the species as temperate and report occurrence from coastal areas to tablelands. They do not provide a defined elevation limit or a quantified climatic threshold.

  • During assessment, confirm local records and inspect damp ground and ephemeral drainage features across the full site, including tableland and coastal forest settings where applicable.

Foraging habitat: Diet and feeding sites

The Brown Brood Frog forages terrestrially at night in ground cover near its breeding habitat. It uses forest, heath or other vegetation cover and may feed outside the wet depression itself.

The species is thought to feed mainly on ants, and also takes beetles and mites. The supplied sources describe feeding in forest or heath cover and adjacent to breeding areas.

Main prey: Ants.

Other recorded prey: Beetles and mites.

Foraging mode: Terrestrial, mainly at night.

  • Inspect moist leaf litter, logs, rocks, grassy debris and low vegetation for shelter and invertebrate foraging habitat.
  • Do not restrict habitat assessment to the inundated part of a breeding site. Terrestrial foraging and sheltering habitat may extend into the surrounding bushland.

Foraging habitat: Foraging area

The supplied sources do not provide a measured home range or maximum foraging distance for the Brown Brood Frog. They indicate that adults forage terrestrially adjacent to breeding areas and use surrounding woodland or other cover.

  • Retain damp ground cover around ephemeral breeding features and avoid isolating breeding patches from adjacent terrestrial habitat.

Breeding habitat: Breeding biology

Breeding is terrestrial at first. Eggs are deposited in moist soil or leaf litter above the normal water level, then hatch when rainfall floods the nest and creates a shallow temporary pool.

Males establish shallow nests or burrows and call from them after rainfall. Females may assess several males and nests before mating. Eggs remain in the nest until inundation, and tadpoles then develop in temporary pools near the nest.

Breeding season: Typically March to June. Calling may occur from February to August, especially after heavy rain.

Eggs per female: About 47 eggs on average, with a reported range of 26 to 78 in one study. Other regional information reports 51 to 200 eggs per female per year.

Egg placement: Moist soil, leaf litter, vegetation, rocks, logs or stones, usually above the water level.

Egg development: Eggs may continue developing inside the nest for 3 to 7 months if rain does not inundate the site soon after laying.

Larval period: Tadpoles develop in shallow ephemeral pools, generally over winter from June to August.

Metamorphosis: Typically early to mid spring, around September and October.

Age at maturity: Females are thought to first reproduce at less than 2 years of age.

Reproductive longevity: Estimated at 1 to 4 years, with a mean of 2 years.

Gestation or incubation: No gestation. Egg development occurs in the terrestrial nest before flooding, and may last 3 to 7 months.

  • Protect both the nest substrate and the temporary pool that will form after inundation.
  • Survey after suitable autumn rain, when calling males are most likely to be detected.

Breeding habitat: Breeding site features

Breeding sites include swamps, bogs, ephemeral creeks, dry creek lines, drainage pans, temporary pools and damp depressions in open forest, woodland, heathland and grassland. The nest is placed in moist humic soil, leaf litter or grassy debris where rising water can flood it.

  • Retain shallow depressions and ephemeral drainage features, including vegetated roadside drains and temporary dams where they support suitable moist cover.
  • Prevent sediment, pollutants and altered runoff from filling or drying temporary pools, or changing the timing and depth of inundation.
  • Maintain leaf litter, logs, rocks and woody debris around breeding patches.

Sheltering habitat: Refuges and cover

The Brown Brood Frog shelters at ground level in damp cover. Shelter and nest sites are closely associated with leaf litter, woody debris, rocks and moist soil near ephemeral drainage features.

Adults shelter under leaf litter, logs, rocks and stones, including in damp areas beside creeks and in grassy areas. The species may occur singly or in low numbers under cover.

  • Retain continuous leaf litter and grassy debris, fallen timber, rocks and low vegetation around ephemeral creeks, depressions, swamps and drains.
  • Avoid removing or stockpiling surface cover during clearing, earthworks and temporary access construction.
  • Inspect damp cover manually only where authorised and use hygienic equipment protocols to reduce disease transfer between sites.

Sheltering habitat: Nests and burrows

Males call from shallow nests or burrows in soil beneath leaf litter, vegetation and woody debris. The supplied sources do not give nest dimensions.

Nest type: Shallow soil depression or burrow under leaf litter, vegetation or woody debris.

Nest dimensions: Not reported in the supplied sources.

  • Treat calling locations and nearby moist soil as breeding habitat, even when no open water is present.
  • Protect the surrounding breeding patch, not only the nest entrance, because males show strong fidelity to breeding patches and can move between nest locations within a patch.

Threats: Clearing and earthworks

The main project risks are loss of breeding depressions and surrounding ground cover, altered runoff, soil moisture change, water pollution, trampling and disease transfer. The species’ terrestrial eggs and patch fidelity mean that impacts can occur outside visible water bodies.

Clearing can remove open forest, woodland, heathland or grassland cover, leaf litter, logs, rocks, grassy debris and moist nest substrate. Earthworks can fill depressions, expose nests, compact soil or alter the flow that inundates nests.

  • Map ephemeral creeks, drainage pans, swamps, bogs, temporary pools, damp depressions and adjacent terrestrial cover before clearing.
  • Use exclusion zones around known breeding patches and retain connected ground cover between breeding and sheltering areas.
  • Avoid clearing or grading during the breeding and larval period where practicable, particularly after autumn rain when males, nests and eggs may be present.

Threats: Hydrology, water quality and roads

Wetland drainage, altered hydrology, changed soil moisture, road construction and road maintenance are identified risks. Nutrient and chemical pollution, siltation and reduced water quality can affect breeding sites and temporary pools.

  • Keep runoff, sediment, concrete washout, fuels, herbicides, pesticides and fertilisers away from ephemeral pools, nest depressions and vegetated drains.
  • Maintain the timing and shallow nature of natural inundation rather than converting temporary habitat to permanently deep or fish-bearing water.
  • Inspect road verges, culverts, drains and temporary access routes because suitable habitat may occur in vegetated roadside drainage lines.

Threats: Fragmentation, trampling and fire

The species has strong fidelity to breeding patches, while localised movement occurs between nest locations within a patch. Fragmentation or loss of adjacent habitat can therefore affect repeated use of a breeding patch. Trampling, grazing and changes in soil moisture are identified or reported concerns.

  • Keep machinery, vehicles, stock and pedestrian traffic out of damp ground, nests, leaf litter and temporary pools.
  • Avoid removing ground litter or repeatedly disturbing the same breeding patch.
  • Assess fire regimes because loss of litter and changes to ground cover can remove shelter and alter soil moisture, although the supplied sources do not quantify a fire interval for this species.

Threats: Predators, disease and other pressures

Cats and foxes are listed threats. Chytrid fungus is also identified as a potential threat and can be moved between sites in soil, on footwear, equipment and vehicle tyres. Agricultural activities with high fertiliser inputs, herbicides, pesticides, drought and increased ultraviolet radiation are additional reported pressures.

  • Apply frog hygiene and decontamination procedures between sites and between separated catchments, following current jurisdictional disease protocols.
  • Do not move soil, water, leaf litter or equipment between breeding sites unless it has been appropriately cleaned and disinfected.
  • Manage domestic and pest predators near known breeding patches in accordance with project and state requirements.

Survey methodology: 1. Call surveys and nocturnal searches

Use targeted surveys for the Brown Brood Frog, also called Bibron’s Toadlet, where works may affect damp ground cover, ephemeral drainage lines, swamps, bogs, open forest, woodland, shrubland or grassland. The supplied documents do not provide a formal Australian survey guideline, so survey design should be adjusted to the site, season, rainfall and state requirements.

Survey after rain when males are calling and breeding sites contain, or are likely to contain, temporary pools. Calling has been reported from February to August, with breeding generally in autumn and the main breeding period reported as March to June.

Search from dusk to dawn, focusing on ephemeral creek lines, drainage pans, swamps, bogs, temporary ponds, roadside ditches and damp depressions with leaf litter, logs, rocks or grassy debris.

Listen for the short, harsh, grating call, described as ‘cre-ek’ or ‘ark’, repeated every few seconds. Record calling males without handling them where possible.

Use the documented study design as a useful reference for repeat effort: the population was surveyed in eight years, with visits over four consecutive nights in each survey year. The study located nests by pinpointing calls with a directional microphone.

Adult size: Females 25 to 32 mm; males about 22 to 30 mm.

Documented survey timing: Dusk to dawn over four consecutive nights in the long-term study.

Breeding period: Generally March to June; calling has also been reported from February to August.

  • Complete surveys during or after suitable rainfall, rather than relying on dry-weather searches alone.
  • Record rainfall, temperature, start and finish times, observers, survey area, access constraints and the condition of temporary pools.
  • Map each calling male, nest, breeding patch, ephemeral pool and connecting strip of damp ground cover.

Survey methodology: 2. Targeted daytime habitat and refuge searches

Search during daylight beneath and beside logs, rocks, dense leaf litter and other damp ground cover near ephemeral waterbodies and drainage lines.

Inspect moist humic soil, partially composted leaf litter, shallow nest depressions, grassy debris and the margins of temporary pools. Males build shallow nests in soil beneath leaf litter, vegetation and woody debris.

Extend the search beyond the wet area into adjacent woodland and forest because adults feed terrestrially and may forage several hundred metres from breeding habitat.

Breeding nest: Shallow soil depression or burrow beneath leaf litter, vegetation or woody debris.

Terrestrial movement: Adults may forage adjacent to breeding habitat and up to several hundred metres away.

  • Use a defined transect or search area that covers the proposed disturbance footprint and retained habitat beside it.
  • Lift rocks and logs only where they can be safely replaced in their original position and orientation.
  • Search both the breeding feature and the surrounding damp refuge habitat, because adults may shelter under leaf litter, rocks and logs after breeding.

Survey methodology: 3. Eggs, tadpoles and breeding-site inspection

Inspect temporary pools, flooded grasslands, puddles, roadside ditches and shallow pools beside nests for tadpoles after rainfall or inundation.

Inspect moist soil and leaf litter for terrestrial egg clutches, but avoid disturbing nests unless required for authorised fauna management.

Treat apparently dry nests as potentially occupied because embryos may continue developing inside unhatched eggs for three to seven months if inundation does not occur soon after laying.

Egg development: Embryos can continue developing inside eggs for three to seven months before hatching when nests are inundated.

Larval habitat: Shallow temporary pools formed near the nest site.

  • Use clean equipment between sites and follow hygiene controls for chytrid fungus, including disinfecting footwear, vehicle tyres and survey equipment between sites.
  • Record the location and condition of pools, water depth, water connection, egg nests, tadpoles and nearby shelter features.
  • Do not release captured animals, water or equipment between catchments or sites.

Survey methodology: Minimum effort and reporting

  • Use repeated dusk to dawn call surveys after suitable rain, with four consecutive nights as the documented study reference where the project risk, access and approval conditions justify that effort.
  • Add daytime searches of all damp refuges and breeding features within the disturbance footprint and the adjacent area that may be used by adults.
  • Record positive and negative results, survey conditions, search effort, GPS locations, photographs, call records, habitat condition and any limitations.
  • Submit confirmed records and survey results to the relevant state wildlife database and notify the project ecologist and approval authority where required.
  • Check the current state survey, handling, animal welfare and hygiene requirements before fieldwork, because the supplied material does not replace those requirements.

Before habitat disturbance: Avoid and minimise habitat loss

Plan the work around the frog’s dependence on moist ground cover, ephemeral water and nearby terrestrial refuge. Protect the breeding patch and its surrounding habitat because males show strong fidelity to particular breeding patches.

Avoid clearing swamps, bogs, ephemeral creek lines, drainage pans, temporary ponds, damp depressions and accumulated leaf litter wherever practicable.

Retain logs, rocks, woody debris, dense ground cover and moist soil beside breeding areas.

Retain adjacent woodland, forest, shrubland and grassland used for shelter and feeding, including habitat extending several hundred metres from breeding sites where practicable.

Keep breeding patches connected to surrounding retained bushland and avoid isolating temporary pools from nearby shelter habitat.

Site fidelity: In a 10-year study, 95% of displaced males returned to their breeding patch, while 20% returned within one metre of the original nest site.

  • Mark breeding patches, calling locations, nests, temporary pools, damp depressions and retained refuge habitat before machinery enters the site.
  • Use the smallest practicable construction footprint and place access tracks, laydown areas and stockpiles outside wet depressions and leaf-litter refuges.
  • Prevent sediment, contaminated water, fertiliser, herbicide and other pollutants from entering temporary pools and drainage lines.

Before habitat disturbance: Approvals and timing

Confirm the current Commonwealth and state conservation status before works commence. The supplied project information identifies the species as not listed under the EPBC Act and Endangered in Victoria, while the South Australian profile describes national concern and local declines.

Obtain any required state scientific, wildlife handling, relocation, threatened-species or vegetation removal approvals before survey, capture or disturbance.

Schedule clearing and ground disturbance outside the local calling and breeding period where practicable. Avoid works after rain when males are calling, nests may contain eggs and temporary pools may contain tadpoles.

Prepare a fauna management plan that identifies survey triggers, exclusion zones, authorised handlers, hygiene controls, relocation areas, injured-animal procedures and stop-work authority.

  • Have the project ecologist confirm whether the current distribution, state listing or project impacts require referral, permit or agency notification.
  • Include the species in the site environmental risk register even where Commonwealth referral is not required.
  • Use local records and pre-clearance results to refine exclusion zones rather than relying only on broad habitat mapping.

Before habitat disturbance: Pre-clearance preparation

Complete the targeted call, habitat and refuge surveys before finalising the clearing boundary.

Mark all occupied or potentially occupied breeding features and establish exclusion fencing where it can protect the feature without blocking the frog’s movement to retained habitat.

Inspect logs, rocks, leaf litter, shallow nests, damp soil, temporary pools and drainage lines immediately before disturbance.

Brief machinery operators on the frog’s small size, terrestrial nests, limited detectability and the requirement to stop when directed by the fauna spotter catcher.

  • Use clean footwear, vehicles and equipment between sites to reduce chytrid transmission.
  • Keep an accessible, nearby retained habitat area available for authorised relocation if an animal must be moved from the work area.
  • Do not place exclusion fencing across a breeding patch or drainage route unless the fauna ecologist confirms that movement to retained habitat will remain possible.

During habitat disturbance: Daily controls and machinery coordination

Use a stop, inspect and release process for all ground disturbance in or near potential habitat. The fauna spotter catcher must be able to direct machinery and must have clear authority to stop work.

Complete a daily pre-start inspection of exclusion fencing, temporary pools, wet depressions, leaf litter, logs, rocks and other marked habitat features.

Keep a fauna spotter catcher ahead of clearing and excavation machinery in ground cover, drainage lines, wet depressions and other potential refuge habitat.

Use staged clearing towards retained habitat so animals can move away from the work area where safe and where the ecologist has approved that approach.

Stop machinery immediately when the spotter catcher identifies a frog, nest, egg mass, tadpole, occupied refuge or unsafe condition.

  • Maintain a clear communication method between the operator, spotter catcher, supervisor and project ecologist.
  • Do not drive over logs, rocks, leaf litter piles, damp depressions or temporary pools unless the approved fauna management plan specifically allows it.
  • Keep spoil, fill, sediment, fuels, chemicals and wash water away from ephemeral pools and drainage lines.

During habitat disturbance: Handling and relocation

Do not handle the frog unless the person is authorised under the project approvals and state requirements.

If a Brown Brood Frog is found, stop the immediate task, photograph and record it where practical, and allow the fauna spotter catcher or other authorised person to assess whether it can move safely without capture.

Where relocation is approved and necessary, move the frog only to nearby retained habitat with suitable damp cover, leaf litter, logs or rocks and access to appropriate breeding habitat.

Avoid moving animals across roads, into isolated habitat, into permanent fish-filled water or outside the local population area.

  • Handle frogs with clean, moistened, powder-free gloves or other approved equipment and minimise handling time.
  • Do not disturb or relocate eggs, tadpoles or nests without specific ecological advice and approval.
  • Place injured animals in a clean, secure, temperature-appropriate container and transfer them promptly to an approved wildlife carer or veterinarian.
  • Record the finder, time, GPS location, condition, action taken, release location, authorisation and photographs.

During habitat disturbance: Habitat feature protection and stop-work triggers

Treat shallow nests, moist leaf litter, logs, rocks, woody debris, temporary pools, wet depressions and drainage lines as potential habitat features.

Replace any lifted log or rock in its original location and orientation unless the fauna ecologist directs otherwise.

Stop work across the relevant exclusion zone if a frog, nest, egg clutch, tadpole aggregation or previously unmapped breeding patch is found.

Stop work if sediment, chemicals, dewatering, vibration, vehicle access or stockpiling is affecting a temporary pool or damp breeding area.

  • Escalate any live animal, nest or egg discovery to the project ecologist before work resumes in that area.
  • Expand the exclusion zone when the find indicates that the mapped habitat boundary is inadequate.
  • Maintain daily records of inspections, weather, rainfall, disturbance area, animals found, habitat features handled, relocations, injuries and stop-work events.

After habitat disturbance: Post-clearance checks

Close out the work only after the disturbed area and retained habitat have been checked. Continue controls where the project has altered drainage, ground cover or access to breeding habitat.

Complete a systematic inspection of the cleared footprint, stockpile areas, access routes, drainage lines and retained habitat margins for frogs, nests, eggs, tadpoles and trapped animals.

Inspect temporary pools and wet depressions after rainfall because eggs may hatch when nests are inundated and tadpoles may occur in shallow pools near the nest.

Remove or modify fauna traps, pits, trenches and exclusion fencing only after the fauna spotter catcher or ecologist confirms that no animals remain trapped or excluded from retained habitat.

  • Backfill or cover trenches, pits and other excavations when not in use, or provide escape ramps approved by the fauna ecologist.
  • Check erosion and sediment controls after rainfall and repair any failure that could affect temporary pools or drainage lines.
  • Keep construction lighting, noise and vehicle access away from retained breeding patches where practicable.

After habitat disturbance: Monitoring and reporting

Monitor retained breeding patches, temporary pools and restored ground cover during the next suitable calling and breeding periods where the project has removed or altered habitat.

Repeat dusk to dawn call surveys after suitable rain and compare calling locations, breeding features and habitat condition with the pre-clearance records.

Report all records, mortalities, injuries, relocations, nest discoveries, stop-work events, water quality incidents and permit breaches to the project environmental officer and relevant authority.

  • Maintain the fauna management plan, survey data, photographs, GPS files, daily pre-start records and rehabilitation records in the project environmental file.
  • Submit confirmed records to the relevant state wildlife database.
  • Review the monitoring results with the project ecologist and amend site controls if breeding activity occurs closer to the works than predicted.

After habitat disturbance: Residual impacts and offsets

Assess whether permanent loss of breeding habitat, altered drainage, fragmentation, pollution or reduced ground cover remains after avoidance, minimisation and rehabilitation.

Apply any offset, compensatory habitat or threatened-species condition required by the relevant approval or state process.

Use the documented disturbance assessment as a reminder that habitat clearing, altered hydrology, changes in soil moisture, pollution, disease, grazing and trampling can affect this species.

  • Do not treat relocation alone as a substitute for retaining breeding patches and adjacent terrestrial habitat.
  • Record the area and type of habitat lost, retained, restored and protected for any approval reporting or offset calculation.

Rehabilitation actions: Restore breeding and refuge habitat

Rehabilitation should restore the combination of temporary wet areas and nearby damp terrestrial cover used by the Brown Brood Frog. The target is functioning breeding habitat, not only planted vegetation.

Re-establish shallow ephemeral pools, drainage pans, seepages and damp depressions that retain water after suitable rain but do not create permanent fish habitat.

Restore natural drainage paths and overland flow so temporary pools can inundate nests without causing prolonged erosion or polluted runoff.

Replace suitable logs, rocks, woody debris and leaf litter across the restored area to provide shelter and nesting cover.

Re-establish locally appropriate woodland, open forest, shrubland or grassland structure around breeding areas, using species and seed sources approved for the local ecological community.

  • Use clean, weed-free soil and mulch that will not introduce contaminants, predators or disease.
  • Do not stockpile soil, mulch or woody debris over temporary pools, damp depressions or retained leaf-litter habitat.
  • Retain a connected strip of damp cover between restored breeding features and surrounding bushland.

Rehabilitation actions: Manage threats during establishment

Control weeds that shade, dry or smother breeding depressions and ground refuges, while avoiding herbicide drift into pools and damp soil.

Exclude grazing and prevent trampling of restored pools, leaf litter, logs and rocks until the site is stable and the ecologist confirms that protection can be reduced.

Use erosion, sediment and pollution controls until water quality and ground cover are stable.

Manage fire so frequent burning does not remove the leaf litter, logs, woody debris and damp cover used for shelter and nesting.

  • Inspect restored areas after rain for sediment entry, scour, blocked drainage and premature drying.
  • Maintain chytrid hygiene for all rehabilitation crews, vehicles, footwear and equipment moving between frog sites.
  • Control feral and domestic animal access where cats, foxes or other predators are identified as a local threat.

Rehabilitation actions: Monitoring and success measures

Monitor survival of planted vegetation, ground-cover development, weed cover, leaf-litter accumulation, log and rock retention, pool formation and water quality.

Survey restored habitat during the local calling period after suitable rainfall, using repeated dusk to dawn searches and recording calling males, nests, eggs, tadpoles and adults.

Compare restored sites with pre-clearance habitat records and retain monitoring until the agreed success measures are met.

Breeding indicators: Calling males, shallow nests, terrestrial egg clutches, inundated nest sites and tadpoles in nearby temporary pools.

  • Use the return of suitable moist ground cover, functioning ephemeral pools and connected refuge habitat as early rehabilitation measures.
  • Use repeated confirmed records of calling or breeding activity as a species-specific outcome where the project approval requires a fauna outcome.
  • If no breeding activity is detected, check rainfall, pool inundation, habitat condition, access by predators and connectivity before concluding that rehabilitation has failed.
  • Submit confirmed records from rehabilitation areas to the relevant state wildlife database.

Sources