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Baw Baw Frog (Philoria frosti)

The Baw Baw Frog is a small-range, terrestrial montane frog found only on the Mount Baw Baw plateau in Victoria. It breeds in wet seepage lines beneath vegetation, logs and rocks, and its eggs and larvae develop in moist terrestrial sites rather than ordinary ponds. Clearing, ground disturbance, altered drainage, fire, pollution, climate change and disease can damage its specialised habitat on development sites.

Conservation status

Commonwealth, EPBC Act 1999: Critically endangered.

Victoria, Flora and Fauna Guarantee Act 1988: Critically endangered.

Breeding season

Baw Baw Frogs breed in wet seepage and drainage habitats from spring to summer. Eggs and larvae develop in concealed terrestrial nests, so clearing risk continues well beyond the main calling period and may extend into autumn.

Reproductive mode: Egg laying. Females deposit eggs in a foam nest during inguinal amplexus.

Clutch size: 50 to 185 eggs in documented field accounts. Captive clutches of 30 to 80 eggs have also been reported.

Incubation or gestation: The embryonic period is reported as 5 to 8 weeks. A captive study reports hatching 10 to 15 days after oviposition.

Size at hatching or birth: Not recorded. Eggs are about 4 mm in diameter.

Age at maturity: Males mature at about 3.5 years. Females mature at about 4.5 to 5.5 years.

Nest or egg sites: Foam nests are placed in natural cavities formed by vegetation, logs, rocks or soil, along seepage and drainage lines. Nests may be below ground to 1 metre or more and usually contain little free water.

Breeding frequency: Breeding occurs annually.

Confirm timing locally before works, because breeding duration and egg laying respond to rainfall, temperature, snow melt and the persistence of seepage flows.

  • Calling: Males call mainly from September to December, with peak calling in October and November. Some calling has also been recorded from January to March, and the season varies with rainfall and temperature.
  • Egg laying: Egg laying occurs during the annual spring to summer breeding period and is concentrated in the shorter peak interval from October to November. Eggs are laid in foam nests in wet seepage and drainage habitats, often beneath or within vegetation, logs, rocks or soil.
  • Eggs in nest: Eggs and larvae remain in concealed terrestrial nests rather than open water. Allow about 10 to 18 weeks from oviposition to metamorphosis, so nests from September to December may remain occupied into March or April.
  • Froglets: Metamorphosis follows about 5 to 10 weeks of larval development after a 5 to 8 week embryonic period. Depending on laying date, froglets may appear from December to May, and recently metamorphosed frogs probably remain close to breeding sites.
  • Active period: Adults move when conditions are wet, including during winter. Movement is reduced by higher temperatures and lower humidity, while males and females use adjacent drier habitats outside the breeding period.
  • Highest clearing risk: Risk is highest from September to February, when calling, egg laying, eggs, larvae and froglets may overlap. Clearing, draining or dewatering can also damage perennial seepage habitat and shelters at other times of year.

Identification

The Baw Baw Frog is a medium-sized, stout terrestrial frog with a large parotoid gland on each shoulder. It is secretive and is most likely to be detected at wet seepage lines, beneath ground cover, or by calling males during the breeding period.

The species is described as a medium-sized, stout frog with a large parotoid gland on each shoulder.

The supplied sources do not provide a reliable adult body length, body mass, colour description, sex differences or a diagnostic description of the call.

Body form: Medium-sized and stout.

Diagnostic feature: A large parotoid gland is present on each shoulder.

Adult size and weight: Not stated in the supplied documents.

Identification: Separating it from similar frogs

Identification should combine the frog's stout form and paired shoulder glands with the very restricted habitat and range. A suspected Baw Baw Frog should be treated as significant when found near seepage lines, subalpine sphagnum wetlands, heathland or montane gullies on the Mount Baw Baw plateau.

The supplied documents do not provide a comparison table or detailed diagnostic characters for separating this species from other Victorian montane frogs. Do not rely on appearance alone where a field identification could affect clearing or handling decisions.

  • Record the exact location, elevation, habitat, weather, microhabitat and photographs of any suspected individual.
  • Use an experienced amphibian ecologist or the relevant Victorian authority to confirm uncertain records.
  • Avoid lifting logs, rocks or vegetation unnecessarily, because these can be refuges or oviposition cover.

Identification: Field signs and survey detection

Adults use natural cavities in or beneath vegetation, logs, peat, soil and rocks. Larvae may occur in egg masses or beneath protective cover at oviposition sites and may sometimes be free living after being washed into nearby streams.

The species can be surveyed by call detection along suitable drainage lines, and by searching for larvae under protective cover. The recommended species account specifies a minimum of four nights under suitable conditions, repeated over several survey periods because the known extent and area of occupancy are limited.

The supplied documents do not describe tracks, scats, eyeshine, sloughs or a distinctive call structure.

Survey effort: At least four nights under ideal conditions, with repeated surveys over several periods.

Transect length: A minimum of 200 metres along suitable drainage lines.

Peak survey period: November to January.

  • Conduct call surveys along suitable drainage lines during the late spring to early summer activity period.
  • Search carefully beneath logs and vegetation for larvae, egg masses or frogs, using methods that minimise disturbance to wet seepage sites.
  • Use a minimum 200 metre stream or drainage-line transect where suitable habitat is present, and include reference sites where feasible.

Distribution

The Baw Baw Frog has one of the most restricted distributions of any Australian frog. It is known only from the Mount Baw Baw plateau in Victoria and is associated with protected montane gully and seepage habitats.

The species is endemic to Victoria and has not been documented from any other Australian state. The supplied documents place it only on the Mount Baw Baw plateau, within alpine, subalpine and montane habitat types.

The sources do not provide a formal IBRA bioregion name, but describe the occupied setting as the Mount Baw Baw plateau and protected montane gullies between 1000 and 1300 metres elevation.

State range: Victoria only.

Known stronghold: Mount Baw Baw plateau and associated protected montane gullies.

Elevation: Approximately 1000 to 1300 metres.

Area reported: Approximately 80 square kilometres in the government factsheet, and 135 square kilometres in the later study.

Distribution: Population and trend

The species has undergone a severe decline. A government factsheet states that numbers were once thought to be 20,000 to 30,000 and that fewer than 600 frogs remained at the time of publication.

The later study reports a decline of up to 98 percent since the 1980s. The documents do not provide a current estimate of the number of occupied sites, subpopulations or local densities.

Earlier estimated population: 20,000 to 30,000 frogs.

Reported remaining population: Fewer than 600 frogs.

Reported decline: Up to 98 percent since the 1980s.

Subpopulations: Not quantified in the supplied documents.

Habitat: Habitat types

Baw Baw Frogs occupy wet, cool montane sites where seepage and groundwater maintain moist substrates. Habitat is concentrated around seepage lines, subalpine sphagnum wetlands, heathland and gullies within montane vegetation communities.

The species is found near seepage lines in or near subalpine sphagnum wetlands, heathland and gullies within montane vegetation communities.

Breeding habitat relies on wet soak and seepage lines beneath vegetation, fallen logs and rocks. Sites are often muddy and rich in organic matter, with complex granular granite structure ranging from large rock to fine particles.

Recorded habitat: Subalpine sphagnum wetlands, heathland, montane gullies and seepage lines.

Elevation: Approximately 1000 to 1300 metres.

Water regime: Wet soak and seepage conditions, often maintained by snow melt from higher plateaux.

  • Retain seepage lines, wet soaks, small drainage lines and adjacent saturated ground.
  • Retain vegetation, fallen logs, rocks, peat and leaf litter around seepage sites.
  • Avoid treating apparently small wet patches as low value, because the species uses localised wet deposition sites rather than ordinary open ponds.

Habitat: Habitat structure

The species depends on moist ground cover and complex substrates. Egg masses are deposited underground at varying depths, depending on the structure of the site.

The Alpine Sphagnum Bogs and Associated Fens ecological community is endangered and occurs as fragmented, isolated remnants. Development or maintenance works in or near these wetlands should prevent changes to water tables, runoff, sediment movement and water flow.

  • Map seepage lines, bogs, fens, peat, saturated depressions and connected drainage features before works begin.
  • Keep machinery, spoil, access tracks and temporary drainage away from wetland margins and seepage-fed ground.
  • Prevent sediment, pollutants and altered runoff from entering seepage lines, bogs or small streams.
  • Treat Sphagnum bogs and associated fens as potential habitat even where Sphagnum has been depleted, if peat and other characteristic species remain.

Foraging habitat: Diet and feeding sites

The supplied species accounts provide little information on the adult diet or foraging range of the Baw Baw Frog. As a terrestrial frog, it should be managed as an invertebrate predator that forages in moist ground cover and near seepage habitat.

Australian frogs generally eat invertebrates, including worms and insects. The Baw Baw Frog's species account does not identify particular prey, food plants or a measured foraging distance.

Suitable feeding areas are likely to include moist vegetation, leaf litter, peat, logs, rocks and seepage margins where invertebrates can occur. This is a habitat-based management inference from the documented refuge and breeding microhabitats, not a measured species-specific foraging range.

Documented frog diet: Australian frogs generally eat invertebrates, including worms and insects.

Species-specific prey: Not reported in the supplied documents.

Foraging range: Not reported in the supplied documents.

  • Retain moist leaf litter, low vegetation, logs, rocks and peat around seepage lines.
  • Avoid clearing or compacting ground cover adjacent to wet breeding sites, because these areas may also provide feeding habitat.
  • Prevent insecticide, herbicide, sediment and other contaminants from reaching wet ground and drainage lines.

Breeding habitat: Breeding biology

Breeding occurs in wet, sheltered terrestrial sites rather than typical open water. Egg masses are deposited underground or in moist, dark vegetation, and larvae normally develop within the wet deposition site using yolk reserves.

Breeding occurs annually. Egg masses are deposited underground, at varying depths according to the structure of the site, and are associated with muddy, organic-rich seepage habitat.

Unlike most frog tadpoles, Baw Baw Frog larvae do not normally feed or swim. They retain a large yolk reserve and develop within the wet deposition site. Larvae may be free swimming if washed into nearby streams.

Breeding season: Calling is documented from September to December, with peak survey activity in November to January.

Egg mass size: 50 to 185 eggs.

Egg appearance: White and unpigmented.

Hatching: Begins about 10 days after oviposition and may continue for up to 5 days.

Larval period: Normally 10 to 18 weeks to metamorphosis.

Age at maturity: Not stated in the supplied documents.

Lifespan: Not stated in the supplied documents.

Breeding habitat: Breeding habitat features

Oviposition sites are wet seepage or soak areas beneath vegetation, fallen logs and rocks. They are typically muddy, rich in organic matter and associated with complex granular granite substrates.

The wider breeding setting includes seepage lines, subalpine sphagnum wetlands, heathland and montane gullies. Larvae and egg masses may be concealed beneath protective vegetation or other cover.

  • Protect the full wet seepage system, including underground egg deposition areas and nearby cover, not just open water.
  • Maintain natural water tables, seepage flows and snow melt drainage.
  • Avoid clearing, trenching, excavation, grading, rock removal and log removal in or beside breeding sites during the breeding and larval periods.
  • Inspect proposed work areas for concealed egg masses and larvae only under an approved species management procedure.

Sheltering habitat: Refuges

Baw Baw Frogs shelter in natural cavities and beneath moist ground cover. These refuges can also form part of the breeding and larval environment, so their removal may affect several life stages at once.

Documented refuges include natural cavities in or beneath vegetation, fallen logs, peat, soil and rocks. Active frogs may occur in vegetation adjacent to seepage lines, including areas up to 55 metres from water.

The documents do not provide refuge dimensions, burrow depths or a defined home range.

Recorded refuge types: Natural cavities in or beneath vegetation, logs, peat, soil and rocks.

Vegetation refuge distance: Vegetation adjacent to seepage lines, up to 55 metres from water.

Refuge dimensions: Not reported in the supplied documents.

  • Retain logs, rocks, peat, soil cavities, dense vegetation and leaf litter around seepage lines.
  • Do not stockpile materials, drive vehicles or place temporary infrastructure over likely refuge cavities.
  • Lift cover only when necessary for an authorised survey or rescue, and replace it in its original position and orientation.

Sheltering habitat: Ground cover and moisture

Moist vegetation, peat, leaf litter, rocks and fallen timber provide concealment and help maintain the damp conditions needed by this species. Removing this cover can expose frogs, dry the substrate and damage concealed egg masses or larvae.

Works should maintain connected wet ground and avoid abrupt changes in drainage, shade and surface moisture around known or potential habitat.

  • Keep ground disturbance to the smallest practicable area around seepage and bog habitat.
  • Use exclusion zones around known breeding and refuge sites before clearing starts.
  • Prevent fire, grazing, trampling and recreational access from degrading wet ground and protective cover.

Threats: Clearing, fragmentation and construction

The Baw Baw Frog is exposed to threats that act on a very small, fragmented distribution. Any project that removes wet seepage habitat or changes its hydrology can affect breeding, larval development, shelter and feeding areas together.

Habitat destruction, pollution and disease are identified as possible causes of decline. The species uses concealed terrestrial breeding sites, so clearing may destroy frogs, egg masses, larvae, refuges and feeding cover without removing an obvious pond.

The associated Alpine Sphagnum Bogs and Fens ecological Community is endangered, highly fragmented and threatened by increased human infrastructure. Development or maintenance activities must not adversely affect the community or its hydrology.

  • Avoid clearing seepage lines, wet soaks, bogs, fens, peat, montane gullies and adjacent ground cover.
  • Prevent fragmentation of wet habitat by roads, tracks, trenches, utilities, pads and temporary work areas.
  • Use clearly marked exclusion zones and inspect them after rain or snow melt for changed flows, sediment or vehicle damage.
  • Keep spoil, concrete washout, fuels, chemicals and contaminated water away from wetland and drainage features.

Threats: Hydrology, sediment and fire

Changes to water flow, runoff, sediment and water table levels can damage alpine bogs and fens. These changes can remove the wet conditions needed for terrestrial egg and larval development.

Fire is an identified threat to the Alpine Sphagnum Bogs and Associated Fens ecological Community. Warmer temperatures and altered snow melt regimes may also reduce the persistence of alpine and subalpine wetlands.

  • Maintain natural seepage, groundwater and snow melt pathways.
  • Design drainage so it does not divert, concentrate or rapidly discharge water into or away from breeding habitat.
  • Control erosion and sediment at road crossings, work pads, stockpiles and disturbed slopes.
  • Apply site-specific fire controls that protect wetland vegetation, peat, logs and refuge cover.

Threats: Disease, pollution and predators

Chytrid fungus, Batrachochytrium dendrobatidis, is an infectious amphibian disease that can cause high mortality. The supplied documents identify disease as a possible contributor to the Baw Baw Frog's decline.

Pollution is also identified as a possible cause of decline. More generally, Australian frog declines have been associated with pesticides, herbicides, introduced fish, siltation and changes in air and water quality. These broader threats should be controlled where they could reach Baw Baw Frog habitat.

Named disease: Chytrid fungus, Batrachochytrium dendrobatidis.

Other documented frog threats: Drainage, pesticides and herbicides, introduced fish, salinity, siltation, fire, grazing, trampling, weeds, infrastructure and climate change.

  • Use amphibian hygiene and decontamination procedures between sites and between reference and impact areas.
  • Prevent chemical spray drift, fuel spills, sediment and contaminated runoff from entering seepage and wetland habitat.
  • Do not introduce fish or other aquatic predators into breeding or drainage waters.
  • Report sick or dead frogs through the approved wildlife disease and threatened species channels.

Threats: Roads and access

The supplied documents do not quantify road mortality or provide a species-specific road crossing rate. Roads and access tracks remain a project risk because they can fragment wet habitat, alter drainage, increase sediment, enable fire and bring vehicles into contact with concealed frogs and refuges.

Road and track planning should therefore avoid seepage lines and wetland remnants, retain drainage connectivity and prevent vehicle access to marked habitat exclusions.

  • Locate roads, tracks, culverts and laydown areas outside seepage-fed habitat wherever practicable.
  • Use erosion and sediment controls at every crossing of a drainage feature.
  • Prevent unauthorised vehicle access to wetland and refuge areas during and after construction.
  • Inspect road edges and drainage structures for altered water flow, sediment deposition and trapped amphibians.

Survey methodology: 1. Plan the survey area and timing

Survey the Baw Baw frog, Philoria frosti, as a highly restricted, cryptic species associated with seepage lines, subalpine sphagnum wetlands, heathland and montane gullies. Use repeated, targeted surveys in suitable drainage lines because a single negative survey does not demonstrate absence.

Known distribution: An area of about 80 square kilometres on the Baw Baw plateau, Victoria, according to the DCCEEW factsheet.

Other published extent: About 135 square kilometres of the Mount Baw Baw plateau, at 1000 to 1300 metres, in the study cited by the research paper.

Survey period: November to January for targeted field surveys; calling period September to December; larval period September to January.

  • Stratify the project area using elevation, slope, drainage lines, seepage areas, vegetation and peat or sphagnum habitat before selecting transects.
  • Prioritise seepage lines and suitable drainage lines in or near subalpine sphagnum wetlands, heathland and montane vegetation communities.
  • Include reference sites in the local area where feasible, particularly where the project site is small or habitat is fragmented.
  • Schedule surveys for the late spring and early summer activity period, with the species account specifying November to January for field surveys.
  • Use the broader calling period of September to December and larval period of September to January when planning seasonal coverage.
  • Do not treat the absence of rainfall as a reason to cancel a survey, because the species account states that rainfall is not necessary and bogs and small streams may be fed by snow melt from higher plateaux.

Survey methodology: 2. Call detection along drainage lines

Minimum nights: At least four nights under ideal conditions.

Minimum transect: At least 200 metres along suitable drainage lines.

Known breeding setting: Wet seepage and soak lines beneath vegetation, fallen logs and rocks.

  • Conduct call detection while walking a stream or drainage line transect through suitable seepage and wetland habitat.
  • Survey under optimum conditions during the late spring and early summer period, using repeated visits across several survey periods.
  • Complete at least four nights under suitable conditions.
  • Use transects of at least 200 metres along suitable drainage lines.
  • Listen at likely breeding and refuge locations, including seepage lines, wet vegetation, logs, peat, soil and rocks.
  • Record that calling surveys detect calling individuals and may miss silent frogs, so combine call detection with habitat searches and larval searches.

Survey methodology: 3. Habitat and larval searches

Egg mass size: 50 to 185 eggs.

Larval development: Normally 10 to 18 weeks to metamorphosis.

Larval behaviour: Larvae retain residual yolk, have no larval tooth rows and may feed on egg jelly, unfertilised or dead eggs, or deceased tadpoles in captivity.

  • Search vegetation, leaf litter, logs, peat, soil and rocks around seepage lines and oviposition sites for concealed frogs.
  • Lift logs and vegetation carefully and inspect the underside and the damp substrate, then replace each cover object in its original position.
  • Inspect foam nests and nearby pools for larvae, lifting protective cover only where this can be done without damaging the site.
  • Treat larval detection as supplementary because larvae may be difficult to identify and may occur under protective cover or in nearby pools.
  • Remember that eggs are deposited underground in muddy, organic sites with complex granular granite structure, and that egg masses can contain 50 to 185 eggs.
  • Search for larvae in wet deposition sites and nearby pools, noting that larvae can be washed into nearby streams and that development to metamorphosis normally takes 10 to 18 weeks.

Survey methodology: Minimum effort and reporting

  • Use at least four survey nights, 200 metre drainage line transects and repeated visits over several periods for any project that may affect suitable habitat.
  • Combine call detection, careful habitat searches and larval or egg mass searches rather than relying on one method.
  • Record survey dates, start and finish times, weather, snow melt or water conditions, transect locations, habitat condition, effort, observers, calls, animals, eggs, larvae and evidence of disturbance.
  • Map all detections and all potentially suitable seepage, wetland and gully habitat using project coordinates and photographs.
  • Report records and survey results to the relevant Victorian wildlife database or authority, and provide the information required by the project approval and fauna management plan.
  • Have an appropriately experienced amphibian ecologist review negative results where works could affect known or potential habitat.

Before habitat disturbance: Avoid and minimise habitat loss

Treat any seepage line, subalpine sphagnum wetland, peat area or montane gully on the Baw Baw plateau as potentially sensitive habitat until targeted surveys and approvals show otherwise. The species has a very restricted range and the DCCEEW factsheet records fewer than 600 frogs remaining.

Refuge features: Natural cavities in or under vegetation, logs, peat, soil and rocks.

Active habitat: Vegetation adjacent to seepage lines, up to 55 metres from water.

  • Redesign the work footprint to retain seepage lines, wet soak areas, sphagnum wetlands, peat, wet leaf litter, logs, rocks and natural cavities.
  • Keep machinery, storage areas, access tracks, spoil, sediment and fuel away from seepage lines, pools, bogs and wet drainage lines.
  • Maintain connections between retained wet habitat patches and montane gullies rather than creating isolated retained areas.
  • Prevent changes to water flow, water table levels, runoff and sediment movement in and around retained bog and fen habitat.
  • Retain fallen logs, rocks, peat, vegetation cover and natural cavities because these are recorded refuge or breeding features for the species.

Before habitat disturbance: Confirm approvals and plan the works

National listing: Critically Endangered under the EPBC Act.

State listing supplied for this profile: Critically Endangered in Victoria.

  • Check whether the proposed action requires an EPBC Act referral because the Baw Baw frog is listed as critically endangered nationally.
  • Confirm Victorian wildlife, vegetation removal, national park, waterway and other permits that apply to the site and proposed action.
  • Obtain approval of a fauna management plan that identifies the species, habitat to be retained, survey results, exclusion areas, stop-work triggers and reporting duties.
  • Schedule clearing and ground disturbance to avoid the species activity and breeding period where practicable, especially November to January.
  • Stage the works so that the smallest practicable area is opened at one time and retained habitat remains undisturbed.
  • Use a suitably experienced amphibian ecologist to set out no-go areas and supervise works in or near suitable habitat.

Before habitat disturbance: Prepare the site

  • Complete the targeted pre-clearance survey before machinery enters suitable habitat, using the survey effort specified for the project risk.
  • Mark seepage lines, wetland margins, peat, pools, logs, rocks, egg sites, larval sites and all retained habitat on plans and on the ground.
  • Install and maintain exclusion fencing or other barriers where they can keep machinery, vehicles, workers and stock out of retained wet habitat.
  • Brief all workers and spotter catchers on the species identification, habitat features, access limits, hygiene controls and stop-work procedure.
  • Clean and disinfect equipment that enters wet habitat in accordance with the approved amphibian disease management procedure to reduce the risk of spreading chytrid fungus.

During habitat disturbance: Daily controls and spotter supervision

Use daily supervision and small, controlled work areas. The Baw Baw frog can be concealed under vegetation, logs, peat, soil and rocks, and its eggs and larvae can occur in wet deposition sites rather than open water.

  • Inspect exclusion fencing, drainage controls and no-go markers at the start of every shift and after rain, snow melt or ground disturbance.
  • Keep machinery outside marked seepage, bog, fen, peat and wet gully areas unless the approved method specifically allows entry.
  • Have the fauna spotter catcher walk ahead of machinery and inspect each work area for frogs, larvae, eggs, logs, rocks, wet vegetation and natural cavities before disturbance.
  • Clear in short stages, stop machinery while the spotter catcher checks concealed habitat, and do not allow operators to work ahead of the inspection.
  • Prevent sediment, concrete washout, fuel, chemicals and dirty water from entering seepage lines, pools, streams or retained wetland habitat.
  • Use amphibian hygiene measures between wet areas and prevent workers from moving water, mud or organic material between sites.

During habitat disturbance: Handle habitat features carefully

  • Do not move logs, rocks, peat or dense vegetation unless the spotter catcher has inspected them and the approved fauna procedure requires relocation.
  • If a cover object must be moved, lift it slowly, inspect the damp space beneath it, and replace it in the same orientation where no animal is found.
  • Protect egg masses and wet deposition sites from vibration, drying, trampling, sediment and changes to drainage.
  • Do not drain, fill or divert nearby pools, seepage lines or small streams without approval and a species-specific response plan.
  • Treat larvae as protected fauna even when found outside open water, because Baw Baw larvae develop under protective cover and can be washed into nearby streams.

During habitat disturbance: Animal finds, stop work and records

  • Stop work immediately within the agreed exclusion distance if a Baw Baw frog, egg mass or larvae is found, and notify the fauna spotter catcher and site environmental officer.
  • Do not allow untrained workers to handle the animal, and use only personnel authorised under the project approval and applicable Victorian requirements.
  • Keep the animal cool, moist and shaded, minimise handling, and do not place it in containers with chemicals, dirty water or material from another site.
  • Relocate the animal only under the approved fauna management procedure, to nearby suitable retained habitat connected to the occupied seepage or wetland system.
  • Take injured animals to an appropriately qualified veterinarian or authorised wildlife carer through the project response chain.
  • Resume work only after the fauna spotter catcher and environmental officer have inspected the area, established protection measures and confirmed that the relevant approval conditions are met.
  • Record the location, time, life stage, photographs, condition, action taken, release location, personnel and any work stoppage for every find.

After habitat disturbance: Post-clearance checks

Do not regard the site as clear when machinery leaves. Check retained habitat, drainage controls and nearby seepage systems, then monitor whether the works have altered the conditions needed by the species.

  • Complete a supervised search of the cleared edge, retained habitat and access routes for frogs, larvae, egg masses and injured animals.
  • Inspect retained logs, rocks, peat, vegetation, pools and seepage lines for damage, drying, sediment or changed water flow.
  • Repair exclusion fencing, erosion controls and drainage controls before demobilisation and after each major rainfall or snow melt event.
  • Remove spoil, waste, temporary pads and other materials that could block seepage, compact peat or alter runoff.
  • Report all detections, mortality, habitat damage, non-compliance and corrective actions to the project environmental officer and relevant authorities.

After habitat disturbance: Monitoring and compliance

  • Monitor retained habitat and restored areas using repeat call, habitat and larval searches during the species activity period.
  • Use the same marked transects, reference sites, timing and effort where practicable so that results can be compared between surveys.
  • Track water flow, wetness, peat condition, sphagnum condition, weed cover, sediment, trampling, fire impacts and predator or feral animal activity.
  • Escalate any decline in habitat condition, unexpected frog mortality, chytrid concern or work outside the approved footprint to the environmental officer and relevant wildlife authority.
  • Maintain monitoring, incident, photographic and spatial records for the period required by the approval, management plan or offset condition.

After habitat disturbance: Offsets and residual impacts

  • Reassess the residual impact on the critically endangered species and its habitat after avoidance, minimisation and rehabilitation measures are set out.
  • Apply any EPBC Act offset, Victorian biodiversity requirement or approval condition required for unavoidable impacts.
  • Make sure any offset or conservation measure protects suitable seepage, sphagnum, peat and montane gully habitat and is monitored for agreed outcomes.
  • Do not use an offset as a substitute for retaining and protecting occupied or suitable habitat within the project area.

Rehabilitation actions: Restore wetland structure and water movement

Rehabilitation should restore wet, shaded and structurally complex seepage habitat rather than simply planting a general native cover. The target condition is connected montane wetland and gully habitat with stable water flow, peat and protective ground cover.

Relevant sphagnum species listed in the conservation advice: Sphagnum cristatum and Sphagnum novozelandicum occur in mainland alpine bog and fen examples.

Species habitat target: Seepage lines, subalpine sphagnum wetlands, heathland and montane gullies with wet vegetation, peat, logs, rocks and soil cavities.

  • Reinstate natural drainage lines, seepage paths, shallow pools and wet deposition areas where construction has altered them.
  • Prevent concentrated runoff, erosion, sediment entry and rapid drainage from the restored area.
  • Rebuild or protect peat and wet organic substrates without compacting them with machinery or repeated access.
  • Replace suitable logs, rocks, leaf litter and vegetation cover that were approved for temporary removal, placing them to recreate damp cavities and shelter.
  • Use sphagnum and other locally appropriate native wetland plants from approved sources where active restoration is required.

Rehabilitation actions: Revegetate and control threats

Threats identified for associated alpine bog and fen habitat: Fire, exotic weeds, grazing and trampling, tourism, infrastructure, sphagnum harvesting and climate change.

  • Revegetate disturbed margins with locally appropriate native species characteristic of the surrounding alpine bog, fen, heathland or montane gully community.
  • Control weeds before they establish in restored wetland areas, with particular attention to willows and other weeds identified in the ecological community advice.
  • Exclude domestic stock and feral animals from restored habitat where grazing, browsing or trampling could damage peat, sphagnum or wet vegetation.
  • Manage access, recreation and infrastructure so that restored seepage lines and bogs are not repeatedly trampled.
  • Apply the approved fire management strategy so that fire does not remove functionally important species or reduce community integrity.

Rehabilitation actions: Monitor recovery and success

Suggested monitoring focus from the conservation advice: Long-term trends in flora and fauna, current extent, community condition, hydrology, threats and recovery.

  • Monitor restored sites and nearby reference sites through the Baw Baw frog activity period, using repeat call, habitat and larval searches.
  • Measure whether seepage flow, wetness, peat stability, sphagnum and native ground cover are returning without increased sediment or weed invasion.
  • Check that logs, rocks, vegetation and other cover features remain in place and provide damp refuge.
  • Use frog detections, egg or larval evidence and habitat condition as separate measures, because a lack of detections may reflect the species' cryptic behaviour.
  • Adapt weed, access, drainage, fire and feral animal controls when monitoring shows that recovery is not progressing.
  • Document rehabilitation areas, methods, plant sources, monitoring dates, results, incidents and corrective actions in the project completion report.

Sources