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Red-lored Whistler (Pachycephala rufogularis)

The Red-lored Whistler is a small, largely sedentary songbird of mallee, mallee heath, shrubland and spinifex habitats in south-eastern Australia. It is listed as Vulnerable under the EPBC Act and is particularly sensitive to clearing, fragmentation, overgrazing and extensive or frequent fire, so suitable habitat should be identified and protected before works begin.

Conservation status

Commonwealth, EPBC Act 1999: Vulnerable.

New South Wales, Biodiversity Conservation Act 2016: Critically endangered.

Victoria, Flora and Fauna Guarantee Act 1988: Vulnerable.

Breeding season

The Red-lored Whistler is generally resident or sedentary, although some autumn and winter movement may occur. Breeding activity is concentrated from August to October, with dependent young likely to remain at risk into spring.

Month values are January to December: 0 means not typical, 1 means occurs, and 2 means peak or highest risk. The exact timing of young remaining dependent is not well documented, so the August to November period is a precautionary field-planning window based on the documented breeding and nestling periods.

  • Breeding: Breeding is recorded from August to October. Nests are placed in low shrubs, mallee, fallen branches or Triodia clumps.
  • Young: Clutches contain two to three eggs. Incubation takes about 15 days and the nestling period is probably about two weeks, so eggs and dependent young may occur from August into November.
  • Movement or dispersal: The species is generally resident or sedentary. Some autumn and winter movement may occur, but the timing and extent are poorly known.
  • Fire sensitivity: Large or frequent fires can remove habitat. Fires in late winter and spring can destroy nests, eggs and nestlings, and recently burnt habitat is generally less suitable.
  • Highest clearing risk: Clearing and disturbance are most likely to harm the species from August to November because breeding, eggs and dependent young may be present. Clearing at any time can remove large territories and long-unburnt habitat.

Identification

The Red-lored Whistler is a small, stocky whistler with a conspicuous song but secretive behaviour. It is often detected by voice before it is seen, especially in dense mallee understorey.

Adults are about 19 to 21 cm long and weigh about 30 to 38 g. The male has dark grey upperparts, an orange-rufous throat and lores, orange-rufous underparts, and a mid-grey band across the upper breast. The eyes are red, and the bill and legs are dark.

Females resemble males but are paler above and below. Immature birds are brownish-grey, with a rufous eyebrow and pale throat.

Typical length: 19 to 21 cm

Typical weight: 30 to 38 g

Identification: Similar species and field signs

The main identification issue is confusion with Gilbert's Whistler, Pachycephala inornata. The Red-lored Whistler has orange-rufous colour extending across the lores and face, as well as the throat and underparts. Female and immature birds can be difficult to separate from Gilbert's Whistler.

The species is shy and cryptic, and its loud, distinctive song may be detected from much farther away than the bird itself. It is usually seen singly or in pairs, and occasionally in groups of up to three.

  • Listen for the characteristic whistling call during early morning searches.
  • Check the face and lores as well as the throat when separating it from Gilbert's Whistler.
  • Look for birds perched in low mallee, shrubs or spinifex, followed by movement to the ground or lower foliage.

Identification: Survey and nest evidence

No diagnostic tracks, scats, sloughs or eyeshine are described for this species. The most useful field signs are the call, a direct sighting, and a low open cup nest made from plant fibres in mallee vegetation, shrubs, fallen branches or spinifex clumps.

For areas smaller than 50 ha, the Australian threatened bird survey guideline recommends 15 hours over five days of area searches or transects, and 15 hours over five days of broadcast surveys. Searches should be undertaken in suitable habitat during the early morning. Playback is most likely to obtain a response during the August to October breeding season.

Area searches or transects: 15 hours over five days for areas smaller than 50 ha

Broadcast surveys: 15 hours over five days for areas smaller than 50 ha

  • Treat a suitable call response as requiring confirmation by an experienced observer where possible, especially in areas occupied by Gilbert's Whistler.
  • Search dense shrub and spinifex patches for low nests, but avoid disturbing active nests.
  • Do not claim absence from suitable habitat solely because birds were not seen during a brief inspection.

Distribution: States and regions

The Red-lored Whistler is endemic to south-eastern Australia. Its range extends from the northern Eyre Peninsula through the Murray Mallee to central-western New South Wales, but occupancy is highly patchy and many former sites no longer support the species.

In South Australia, the species occurs in the northern Eyre Peninsula, the Ninety-Mile Desert and Murray Mallee, including Ngarkat, Mount Rescue, Billiatt, Carcuma and Mount Boothby conservation areas, and the Riverland Biosphere Reserve. Records have also occurred near the lower Murray around Mannum, Murray Bridge, Ferries-McDonald Conservation Park and Lake Alexandrina.

In Victoria, it occurs mainly in the Big Desert and Murray Mallee, including Murray-Sunset National Park, Annuello Flora and Fauna Reserve, and areas near Wyperfeld National Park. Historical or more recent records have also been associated with Hattah-Kulkyne National Park, although the species may now be locally extinct at some Victorian sites.

In New South Wales, the remaining known range is centred on Round Hill and Nombinnie Nature Reserves and the adjoining Nombinnie State Conservation Area in central-western NSW. Former records from Pulletop Nature Reserve and the Scotia, Tarawi and Mallee Cliffs area are no longer supported by recent searches.

Distribution: Strongholds and subpopulations

The largest reported population was in the Riverland Biosphere Reserve north of the Murray River in South Australia. Other important areas include the Ngarkat, Big Desert and Wyperfeld complex, and the Murray-Sunset and Hattah complex.

The NSW population is extremely small. The 2008 NSW review reported mostly single birds, with occasional records of two or up to six birds at Round Hill and Nombinnie. It identified only one or possibly two populations remaining in NSW.

Estimated national breeding population: No more than 2,000 mature individuals, estimated in six subpopulations

Reported Riverland population: About 1,000 birds

Ngarkat, Big Desert and Wyperfeld complex: About 100 to 200 pairs

Murray-Sunset and Hattah complex: More than 100 pairs

NSW records at Round Hill and Nombinnie: Mostly single birds, occasionally two or up to six

Distribution: Population trend

The species has declined substantially. The estimated breeding population fell from about 10,000 birds in eight subpopulations to no more than 2,000 mature birds in six subpopulations, largely because of extensive fires and drought.

Numerous smaller populations have become locally extinct. Large fires in 2006 and 2014 substantially reduced populations in South Australia, and the species has disappeared from or may have disappeared from several reserves in Victoria and NSW.

Habitat: Vegetation communities

The species has specialised habitat requirements and is usually associated with low, open mallee or mallee heath containing spinifex and a patchy shrub layer. Habitat condition and time since fire are important determinants of occupancy.

Typical habitat is Spinifex Grass, or Triodia, mallee, mallee shrubland and mallee heath. The main eucalypts include lerp mallee, Eucalyptus incrassata, white mallee, Eucalyptus dumosa, and red mallee, Eucalyptus socialis.

The species is also occasionally recorded in tall mallee, open eucalypt woodland, Banksia scrub and black box woodland, particularly outside the main breeding habitat.

  • Prioritise low mallee and mallee heath with Triodia scariosa.
  • Retain mature or advanced regrowth mallee with an intact shrub layer.
  • Include apparently suitable vegetation in the assessment even where birds have not recently been recorded, because occupancy is patchy.

Habitat: Habitat structure and fire age

Preferred sites generally have an open or sparse mallee canopy about 2 to 5 m tall, a low shrub layer about 1.5 m tall that is dense but patchy, and ground cover dominated by Triodia and other grasses or herbs.

The species is mostly associated with vegetation older than 20 years after fire, although records span about 5 to 40 years after fire in some areas. Important habitat may be 21 to 44 years post-fire in the Sunset Country and 46 to 52 years post-fire in the Riverland Biosphere Reserve. In mallee heath, some birds use vegetation about 10 to 24 years post-fire.

Typical mallee canopy: Open or sparse canopy, about 2 to 5 m tall

Typical shrub layer: About 1.5 m tall, dense but patchy

Important post-fire ages: Often more than 20 years, with important sites recorded at 21 to 44 years and 46 to 52 years

  • Avoid clearing or heavily modifying long-unburnt and mid-aged mallee.
  • Map fire age and retain connected patches of vegetation older than 20 years where possible.
  • Do not treat recently regenerating mallee as equivalent to mature or advanced regrowth habitat.

Habitat: Climate and elevation

The supplied documents describe a semi-arid to arid inland distribution but do not provide a defined elevation range or a specific upper or lower climate limit. Project assessments should therefore use mapped mallee habitat, fire history, grazing condition and recent records rather than elevation alone to judge potential habitat.

Foraging habitat: Diet and feeding behaviour

The Red-lored Whistler feeds mainly on arthropods and insects. It uses both the ground layer and the canopy, with the balance varying between sites and studies.

The diet consists mainly of insects and other arthropods, with occasional seeds, fruit and berries. The NSW review describes insects, berries and seeds being gleaned mainly from the ground around shrubs.

A study cited in the recovery plan found that birds in Spinifex mallee and mallee heath foraged mostly in the canopy by snatching and gleaning. Birds are therefore likely to use the full vertical structure from ground cover to the mallee canopy.

Main food: Arthropods, mainly insects

Additional food: Occasional seeds, fruit and berries

Foraging strata: Ground around shrubs, low vegetation and mallee canopy

  • Retain Triodia tussocks, leaf litter, fallen branches and low shrubs that support ground-foraging prey.
  • Retain mallee foliage and canopy structure used for snatching and gleaning insects.
  • Avoid dust, trampling, heavy machinery and stock access that reduce shrub, litter and ground-layer condition.

Foraging habitat: Foraging area

Breeding territories are large, particularly in spinifex mallee. The reported territory is about 100 ha in Spinifex Grass mallee and about 20 ha in mallee heath, with about 30 per cent overlap between neighbouring territories.

The low population density, reported as about one bird per 50 ha, means that a small clearing can affect habitat used beyond the immediate footprint.

Territory in spinifex mallee: About 100 ha

Territory in mallee heath: About 20 ha

Approximate density: About one bird per 50 ha

  • Assess adjoining habitat within the likely territory, not only the area directly occupied by the project.
  • Consider indirect effects such as grazing, fire breaks, access tracks and edge disturbance across the surrounding mallee.

Breeding habitat: Breeding biology

Breeding occurs from late winter through spring in mallee with an open canopy and a fairly dense shrub layer. Nests are low and can occur in vegetation that may be affected directly by clearing, fire or stock disturbance.

Breeding season: August to October

Clutch size: Two to three eggs

Incubation: About 15 days

Nestling period: Probably about two weeks, based on the NSW review and comparison with other whistlers

Age at maturity: Not reported in the supplied documents

Lifespan: Not reported in the supplied documents

Generation length: Estimated at five years

Breeding habitat: Nest sites and breeding structure

Nests are open cups made from plant fibres. They may be placed in mallee eucalypts, shrubs, under overhanging foliage, on a fallen branch, or on top of a Triodia clump. Nests are often less than 1 m above the ground.

Breeding habitat has mallee eucalypts about 5 to 8 m tall, an open canopy and a fairly dense shrub layer. The low position of nests makes them vulnerable to clearing, fire, livestock, cats and foxes.

Typical breeding mallee height: About 5 to 8 m

Nest height: Often less than 1 m above ground

  • Inspect dense shrub layers, mallee forks, overhanging foliage and Triodia clumps before vegetation removal.
  • Avoid clearing and high-disturbance activities in suitable breeding habitat from August to October unless impacts have been assessed and appropriate controls are in place.
  • Keep livestock and other large mammals away from active nest areas.

Sheltering habitat: Cover and refuge features

The supplied documents do not describe separate roosts, hollows, dens or burrows. Shelter and concealment appear to be provided mainly by dense shrubs, Triodia tussocks, mallee foliage and ground-layer debris.

The species uses low mallee, dense or patchy shrub layers and spinifex ground cover. Nests may be placed in Triodia clumps, and birds are described as cryptic and associated with dense understorey.

Woody debris, fallen branches, leaf litter and intact ground cover are likely to support the invertebrate prey and concealment used by the species, although the documents do not provide a measured refuge size.

Documented shelter structures: Dense shrubs, Triodia clumps, mallee foliage and ground-layer cover

Measured refuge dimensions: Not reported in the supplied documents

  • Retain Triodia tussocks, dense shrubs, fallen branches, woody debris and leaf litter.
  • Avoid unnecessary slashing, grading, burning, stock access and machinery movement through the ground layer.
  • Maintain connected mallee patches because isolated remnants are less likely to support the species over the long term.

Sheltering habitat: Fire refuges

Unburnt patches within or beside fire-affected mallee can provide refuge and sources for recolonisation. Large fires can remove suitable habitat across very large areas, and the species may not recolonise for at least five years after fire.

Management should retain a mixture of mid-aged vegetation and older unburnt mallee rather than allowing one fire to remove all suitable cover.

Minimum period before recolonisation reported: At least five years after fire

  • Retain unburnt patches during planned burning.
  • Avoid broad, continuous fire treatments across known or potential whistler habitat.
  • Map recent fire scars and assess whether remaining unburnt patches are large and connected enough to support birds.

Threats: Clearing and fragmentation

The main risks are loss and fragmentation of mallee habitat, frequent or extensive fire, grazing and predation. Project activities can add direct clearing, edge effects, vehicle access, ignition risk and disturbance during the breeding season.

Historical clearing, especially on more fertile soils, caused major range contraction. Ongoing clearing and isolated remnants continue to reduce habitat and can remove breeding territories and foraging areas.

Small remnants may not support the species over the long term. In NSW, the Pulletop population became extinct after continued clearing around the reserve, and nearby small remnants supported fewer birds than larger intact mallee areas.

  • Avoid clearing mature or advanced regrowth mallee, mallee heath, Triodia and dense shrub layers.
  • Retain links between habitat patches and avoid creating new gaps across mallee.
  • Assess the full territory and nearby habitat, not only the area of direct vegetation removal.

Threats: Fire

Frequent and extensive fire is identified as the greatest current threat to the remaining populations. Large fires can remove hundreds or thousands of square kilometres of habitat, while regeneration can take decades before it again suits all mallee birds.

Fires in late winter and spring can destroy nests, eggs and dependent young. Recently burnt habitat is generally less suitable, and the species has not been recorded recolonising some areas until at least five years after fire.

  • Avoid broad burns across known or potential habitat.
  • Protect unburnt patches and retain a range of fire ages, including areas older than 20 years.
  • Control ignition sources, vehicle access and hot works during periods of high fire danger.

Threats: Grazing and habitat degradation

Domestic stock, goats, rabbits and native herbivores can remove shrubs and ground cover, prevent regeneration, disturb soil and reduce invertebrate food resources. Grazing impacts around water points can make habitat unsuitable for more than 6 km.

Low nests are vulnerable to disturbance by livestock, while trampling and loss of Triodia and shrub cover reduce both foraging and breeding habitat.

Reported grazing impact around dams: Habitat may be unsuitable for more than 6 km around dams

  • Control stock and feral herbivore access to intact mallee and water points.
  • Prevent construction traffic and temporary works from compacting soil or removing Triodia tussocks.
  • Retain ground cover, leaf litter and woody debris.

Threats: Predators, roads and other project risks

Feral cats and European foxes are recognised threats, especially to low nests, eggs and young. The supplied documents do not provide species-specific road mortality rates, but new roads and tracks can remove habitat, increase fragmentation, enable predator access and increase ignition risk.

Climate change and drought can reduce habitat condition and compound the effects of fire. No species-specific disease threat is identified in the supplied documents.

  • Limit new roads, tracks, laydown areas and easements through intact mallee.
  • Use predator control where it is part of an approved regional or reserve management programme.
  • Manage construction waste, food and water sources so they do not attract foxes, cats or other predators.
  • Record any road-killed or injured whistlers and report sightings through the relevant state system.

Survey methodology: 1. Habitat assessment and survey design

Survey the Red-lored Whistler in suitable mallee, mallee heath, shrubland and spinifex habitat before clearing or construction. The species is elusive and is more often heard than seen, so surveys must combine listening, visual searches and breeding-season call playback. [No source ids in text]

Breeding season: August to October

Typical habitat height: Mallee canopy 2 to 5 metres, with a shrub layer about 1.5 metres tall

Preferred post-fire age: Often older than 20 years, with many records from 21 to 40 years after fire

  • Map mature or advanced-regrowth mallee, mallee heath and shrubland with a dense or moderately dense shrub layer and Triodia scariosa ground cover before selecting survey points.
  • Prioritise habitat with a sparse or open mallee canopy, generally 2 to 5 metres tall, and a dense shrub layer about 1.5 metres tall.
  • Give particular attention to vegetation older than 20 years after fire, including areas aged 21 to 40 years, while also checking suitable younger regrowth and long-unburnt habitat.
  • Record nearby cleared areas, isolated remnants, grazing impacts, recent fire scars and links to retained mallee because fragmentation and poor habitat condition affect occupancy.
  • Design the survey to cover all suitable habitat within the project area and any adjoining habitat that could be affected by access tracks, machinery movement, noise or fire.

Survey methodology: 2. Early morning area searches and transects

Recommended method: Area searches or transect surveys

Effort for areas under 50 hectares: 15 hours over 5 days

Best survey period: Early morning

  • Conduct area searches or transect surveys in suitable habitat during the early morning, when calling activity and detection are most useful.
  • Use a total effort of 15 hours over 5 days for areas smaller than 50 hectares, as the species-specific survey guideline recommends.
  • Walk slowly through or beside suitable mallee and heath, stopping regularly to listen for the loud call and to scan the canopy, shrub layer and ground around spinifex clumps.
  • Record every detection with date, time, location, habitat type, vegetation height, post-fire age where known, behaviour and the direction of calling birds.
  • Treat aural detections as records of presence and investigate the call direction without repeatedly entering dense cover or disturbing nests.

Survey methodology: 3. Breeding-season broadcast surveys

Recommended method: Broadcast surveys

Effort for areas under 50 hectares: 15 hours over 5 days

Recommended timing: Breeding season, August to October

  • Use broadcast or playback surveys during the breeding season, from August to October, when the method is likely to solicit responses.
  • Apply a total playback effort of 15 hours over 5 days for areas smaller than 50 hectares, unless a regulator or suitably qualified ecologist approves another evidence-based design.
  • Use playback sparingly, allow quiet listening periods after each broadcast and stop if a bird responds or shows signs of disturbance.
  • Position playback stations to sample all suitable habitat types and avoid concentrating repeated broadcasts at one territory.
  • Record the playback sequence, station locations, timing, weather, response time, number of birds and whether the response was auditory or visual.

Survey methodology: 4. Detection, identification and limitations

Typical occurrence: Usually singly or in pairs, and rarely in groups of three

Estimated territory size: About 100 hectares in Spinifex Grass mallee and 20 hectares in mallee heath

Estimated density: About one bird per 50 hectares in one study

  • Listen for the species before relying on visual confirmation because Red-lored Whistlers are unobtrusive, elusive and usually located by their loud call.
  • Check visual records carefully against Gilbert’s Whistler and female Golden Whistler, which are listed as identification similarities in the survey guideline.
  • Confirm uncertain records with clear recordings, photographs where possible, location data and an experienced ornithologist or state wildlife authority.
  • Do not claim absence solely because no bird was seen during a brief site inspection, because the species is cryptic, occurs at low density and may occupy large territories.
  • Extend the search or revise the method when weather, wind, traffic, machinery, dense vegetation or other noise is likely to reduce call detection.

Survey methodology: Minimum effort and reporting

  • Complete the relevant habitat assessment before concluding that the species is unlikely to occur.
  • For suitable areas under 50 hectares, use both 15 hours over 5 days of early morning area searches or transects and 15 hours over 5 days of breeding-season broadcast surveys where playback is appropriate.
  • Document the area surveyed, dates, start and finish times, observers, weather, methods, effort, call recordings, detection coordinates, habitat condition, fire history and any constraints.
  • Submit confirmed records and reliable non-detections, where requested, to the relevant state wildlife database and the Atlas of Living Australia or other approved national repository.
  • Provide survey results to the project ecologist and approval authority before clearing, and retain the field data with the project environmental records.

Before habitat disturbance: Avoid and minimise habitat loss

Treat suitable Red-lored Whistler habitat as a potential occupancy area until survey evidence and approval conditions show otherwise. Avoid removing mature or advanced-regrowth mallee, dense shrub layers, spinifex and links between retained patches.

  • Retain the largest practicable areas of mature or advanced-regrowth mallee and mallee heath, particularly vegetation older than 20 years after fire.
  • Retain Triodia scariosa clumps, dense shrub layers, fallen timber and leaf litter that support foraging and nesting around shrubs and spinifex.
  • Keep retained habitat connected to other mallee patches where practicable because isolated remnants may not support a population over the long term.
  • Avoid placing compounds, access tracks, spoil, drainage works and ignition sources beside occupied or suitable habitat.
  • Set project-specific exclusion buffers around confirmed birds, nests and retained habitat in consultation with the project ecologist and approval authority, because the supplied documents do not prescribe a single buffer distance.

Before habitat disturbance: Approvals and work planning

National status: Vulnerable under the EPBC Act

Breeding period to avoid where practicable: August to October

  • Check whether the proposed action may have a significant impact on this EPBC Act listed species and obtain advice on referral or approval before work starts.
  • Confirm state threatened-species requirements, permits, licences and consent conditions for the state or territory where the project is located.
  • Schedule clearing and the most disruptive works outside the August to October breeding season where practicable.
  • Stage clearing so that retained habitat remains connected and birds can move away from the work area before vegetation is removed.
  • Prepare a fauna management plan that identifies survey results, no-go areas, spotter catcher responsibilities, stop-work triggers, incident contacts, handling limits and reporting requirements.

Before habitat disturbance: Pre-clearance preparation

  • Complete a pre-clearance inspection shortly before works, focusing on dense shrub layers, spinifex clumps, low nests, mallee forks and ground-foraging areas.
  • Mark retained habitat, confirmed territories, nests, exclusion zones, access routes and fauna release areas on plans and on the ground.
  • Use exclusion fencing where it can keep machinery and people out without blocking movement between retained habitat patches.
  • Brief machine operators and all contractors on the species’ appearance, call, habitat, exclusion zones and the requirement to stop when directed by the fauna spotter catcher.
  • Remove or control livestock, goats, rabbits and other grazing pressure from retained habitat where this is part of the approved project controls.

During habitat disturbance: Daily controls and machinery coordination

Use an active fauna management system during clearing and construction. The fauna spotter catcher must have authority to pause work, and machinery must proceed only after the work area has been checked and released.

  • Inspect the work area each day before machinery enters, including vegetation, ground cover, fallen timber, low nests and access edges.
  • Use one clear communication channel between the fauna spotter catcher, supervisor and machine operators, with an agreed stop signal that overrides production instructions.
  • Clear in short sections from the edge towards retained habitat where safe and approved, giving birds an opportunity to move into undisturbed cover.
  • Keep machinery outside marked exclusion zones and stop immediately when the fauna spotter catcher identifies a bird, nest, injured animal or previously unrecorded habitat feature.
  • Avoid unnecessary noise, night work, dust, smoke and vehicle movements beside retained mallee and shrubland.

During habitat disturbance: Fauna spotter catcher response

  • The fauna spotter catcher must search the active work section before clearing, remain close enough to observe machinery and have authority to stop the task.
  • Do not chase, flush repeatedly, catch or handle a Red-lored Whistler unless the person is authorised, trained and the action is permitted by the project approval and wildlife law.
  • If a bird is found, stop the immediate work, keep people and machinery back, allow the bird to move naturally and record the location and direction of movement.
  • Relocate a bird only when a suitably authorised person considers relocation necessary and safe, using nearby retained habitat that matches the species’ mallee and shrub requirements.
  • Take an injured bird to an approved wildlife carer or veterinarian through the project’s wildlife response process, and record the outcome.

During habitat disturbance: Habitat features and stop-work triggers

  • Stop work if a nest, dependent young, occupied territory, injured bird or unidentified threatened bird is found within or beside the work area.
  • Stop work if clearing reveals dense spinifex, low shrub cover or a habitat patch that was not included in the approved pre-clearance assessment.
  • Do not remove logs, woody debris or spinifex from retained habitat unless the action is approved and the fauna spotter catcher has checked the feature.
  • Treat low nests in shrubs, mallee forks and spinifex clumps as potential Red-lored Whistler nesting sites and obtain ecological direction before disturbing them.
  • Do not assume that hollow-bearing trees, rocks, burrows or wetlands are relevant only to mammals or reptiles, because their removal can alter cover, food resources and movement for the wider fauna community.

During habitat disturbance: Records and incident reporting

  • Record daily work areas, start and finish times, personnel, weather, habitat cleared, fauna observations, stop-work events, handling, relocation and injuries.
  • Photograph and map nests, occupied habitat, exclusion zones and any fauna incident where this can be done without causing disturbance.
  • Notify the project environmental officer and approval authority of any threatened bird death, injury, nest disturbance, unauthorised clearing or failure of an exclusion control.
  • Update the site risk assessment when a detection changes the known distribution or use of the work area.
  • Retain call recordings and location data for all confirmed or probable records.

After habitat disturbance: Post-clearance checks

Post-clearance work must check that the approved footprint was followed and that retained habitat remains usable and connected. Monitoring should focus on occupancy, habitat condition, fire history and grazing impacts.

  • Inspect the cleared edge and retained habitat for injured or trapped fauna, damaged nests, new access impacts, weed spread, rubbish and grazing damage.
  • Confirm that all no-go areas, buffers, fencing and habitat retention measures remain in place after machinery leaves.
  • Check that retained mallee, shrub layers, Triodia clumps, fallen timber and movement links were not damaged by vehicles, dust, spoil or drainage changes.
  • Complete a final clearance report that compares the approved footprint with the area actually disturbed and explains any variation.

After habitat disturbance: Monitoring and adaptive controls

  • Monitor retained suitable habitat using early morning area searches or transects and breeding-season broadcast surveys where approved and appropriate.
  • Use the species guideline effort as a reference for areas under 50 hectares, with 15 hours over 5 days for area searches or transects and 15 hours over 5 days for broadcast surveys.
  • Repeat monitoring when fire, drought, grazing, new clearing or construction noise changes habitat condition or connectivity.
  • If monitoring records the species, revise work controls, access routes and exclusion areas with the project ecologist and regulator.

After habitat disturbance: Reporting and offsets

  • Report confirmed records, deaths, injuries, nest disturbance and habitat loss to the relevant state wildlife database and approval authority as required.
  • Submit suitable occurrence records to the Atlas of Living Australia or another approved repository, with accurate coordinates and observation details.
  • Maintain rehabilitation, fencing, grazing and fire controls for the period required by approval conditions.
  • Assess offsets only where required by the EPBC Act, state law or project approval, and ensure any offset protects and manages suitable Red-lored Whistler habitat rather than replacing on-site avoidance.

Rehabilitation actions: 1. Rebuild suitable vegetation structure

Rehabilitation should recreate the structure and continuity of low mallee and mallee heath used by the Red-lored Whistler. The target is not simply tree cover. It is an open or sparse mallee canopy with a dense, patchy shrub layer and suitable spinifex ground cover.

Typical mallee height in suitable habitat: 2 to 5 metres

Typical shrub layer height: About 1.5 metres

Ground cover: Usually Triodia and local grasses and herbs

  • Use locally appropriate mallee species recorded from the habitat, including Eucalyptus incrassata, Eucalyptus dumosa and Eucalyptus socialis where suitable for the site.
  • Re-establish a low, dense and patchy shrub layer using locally occurring species such as Acacia, Callitris verrucosa, Leptospermum coriaceum, Calytrix tetragona, Hakea muelleriana, Baeckea, Phebalium, Leucopogon, Banksia ornata and Melaleuca uncinata where consistent with the reference community.
  • Re-establish Triodia scariosa and other local ground-layer plants, including Westringia rigida, Ptilotus and Stipa species where they occur in the reference habitat.
  • Aim for a sparse or open mallee canopy and a shrub layer that provides dense cover, rather than planting a uniform closed woodland.
  • Use local seed or approved provenance material and match plantings to soil type, existing vegetation and fire history.

Rehabilitation actions: 2. Reinstate cover and connectivity

  • Retain and replace fallen timber, woody debris, leaf litter and spinifex clumps in rehabilitation areas where they occur in the reference habitat.
  • Connect rehabilitation areas to retained mallee patches wherever practicable and keep vehicle tracks, fences and drainage structures from creating unnecessary barriers.
  • Do not install nest boxes as a substitute for the species’ documented low nests unless a qualified ecologist and approval authority identify a specific need and design.
  • Use temporary fencing to protect new plantings and ground cover from stock, goats, rabbits and other grazing pressure.
  • Control weeds and avoid broad-scale disturbance that removes the shrub and ground layers needed for foraging and nesting.

Rehabilitation actions: 3. Fire, grazing and predator management

Fire-sensitive breeding period: Late winter and spring, including August to October

Habitat often used by the species: Vegetation older than 20 years after fire, with many records from 21 to 40 years

  • Develop a fire plan that prevents a single extensive fire from removing all retained and rehabilitated habitat in the project area.
  • Maintain a mix of post-fire age classes while protecting older mallee and avoiding frequent fire through occupied or developing habitat.
  • Retain unburnt refuge patches during any approved fuel reduction or ecological fire and avoid burning during the August to October nesting period.
  • Manage total grazing pressure so that shrubs, spinifex, leaf litter and regeneration are not removed or trampled.
  • Apply approved cat and fox control where predation is identified as a project threat, and monitor for reinvasion.

Rehabilitation actions: 4. Rehabilitation monitoring and success measures

Suggested ecological detection methods: Early morning area searches or transects, plus breeding-season broadcast surveys

Reference effort for areas under 50 hectares: 15 hours over 5 days for each of area searches or broadcast surveys

  • Inspect rehabilitation at least after establishment, after major disturbance and after fires, with the frequency set by approval conditions and the project ecologist.
  • Measure plant survival, canopy and shrub height, shrub cover, Triodia establishment, weed cover, grazing signs, connectivity and the area protected from fire.
  • Use early morning searches and breeding-season call playback to test whether Red-lored Whistlers use rehabilitated habitat once structure has developed.
  • Treat successful rehabilitation as the establishment of a connected mallee or heath community with a sparse canopy, dense patchy shrub layer, spinifex or equivalent local ground cover and no uncontrolled grazing.
  • Report failures such as poor regeneration, weed invasion, excessive grazing, repeated fire or predator impacts, and implement corrective works.

Sources