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Striated Fieldwren (Calamanthus fuliginosus)

The Striated Fieldwren is a small, sedentary Australian songbird of low, dense heath, sedgeland, samphire and tussock grassland, often near wetlands. It is listed as Endangered in New South Wales and can be affected by clearing, fragmentation, wildfire, predation and disturbance to low nesting cover on development sites.

Conservation status

New South Wales, Biodiversity Conservation Act 2016: Endangered.

Breeding season

The species is sedentary across its range, although the timing of breeding and the presence of dependent young vary with local conditions. The breeding period is described broadly as late winter to summer.

Month values are ordered January to December. The supplied sources give a broad breeding period rather than a state-specific calendar.

  • Breeding: Egg laying occurs from late winter to summer. The supplied sources do not provide a more precise month by state.
  • Young: Incubation is probably about 16 days, nestling life probably about 17 days, and post-fledging dependence probably about one month. Timing is inferred from related species.
  • Highest clearing risk: Risk is highest from late winter through summer because nests, eggs, nestlings and dependent fledglings may be present in low shrubs, tussocks and dense ground cover.

Identification

The Striated Fieldwren is a small, olive-brown, scrubwren-like bird that stays close to dense ground vegetation. It is often detected by its repeated song from a low shrub or other prominent perch before it is seen.

Adults are about 12 to 14 cm long and weigh about 20 to 22.4 g. The plumage is olive-brown and heavily streaked across the head, back, wings and chest, with a pale eyebrow and a cocked tail.

The species is darker and more olive than the Rufous Fieldwren. In New South Wales, the relevant subspecies is Calamanthus fuliginosus albiloris.

Key appearance: Small olive-brown bird with heavy streaking, a pale eyebrow and cocked tail.

Tail: Shorter than the Eastern Bristlebird and with a white tip.

Identification: Similar species

Separate it from the Rufous Fieldwren by its darker, more olive plumage and coastal heathland distribution. The Rufous Fieldwren is associated with arid western New South Wales.

It is smaller and more heavily streaked than the Eastern Bristlebird. It has a shorter tail with a white tip, while heathwrens have a brighter rufous rump. It is more streaked than scrubwrens and lacks the longer, unmarked tail of the Little Grassbird.

Identification: Field signs and detection

Males sing continually during the breeding season and commonly sing from prominent emergent shrubs or other perches at the edge of heath. The song can be heard beyond 50 m in suitable conditions.

Flushed birds often fly a short distance and perch on top of a shrub, or disappear into the heath and reappear on a shrub shortly afterwards. Birds are usually encountered singly or in pairs, although adults and dependent young can form family groups.

Typical social unit: Solitary birds, pairs, or family groups with dependent young.

Song perch: Usually an emergent shrub on or beside low heath.

  • Search low, dense heath systematically and pause to scan nearby shrubs after a call or sighting.
  • Look for a domed nest of coarse grasses and plant fibres, lined with feathers and down, hidden in or at the base of low shrubs or grass tussocks.
  • Do not rely on tracks or scats for detection. The supplied sources do not describe diagnostic tracks, scats, sloughs or eyeshine for this species.

Distribution: National range

The species is endemic to south-eastern Australia. Records and subspecies information in the supplied sources place it in Tasmania, South Australia, Victoria and south-eastern New South Wales.

The nominate subspecies occurs in Tasmania and south-eastern Australia. Other subspecies occur from south-eastern South Australia to south-western Victoria, from south-eastern Victoria to south-eastern New South Wales, and in western Tasmania.

In New South Wales, the species is restricted mainly to the south-east coast, from the Victorian border north to the Blue Mountains, with most recent records south of the Clyde River and few records north of Jervis Bay.

  • Documented New South Wales areas include Morton National Park, Ben Boyd National Park and Nadgee Nature Reserve.
  • Historical or isolated records included the northern Blue Mountains, Botany Bay, Mittagong and the Budawang Range.

Distribution: Strongholds and subpopulations

The main New South Wales strongholds identified in the supplied sources are the Morton National Park area and the Ben Boyd National Park and Nadgee Nature Reserve complex. The Tianjarra Plateau and surrounding Morton National Park area is also identified as an important site.

The New South Wales population is fragmented, with sparse and disjunct populations between Jervis Bay and Ben Boyd National Park. Northern populations around Sydney and the Blue Mountains have disappeared from sites where they were recorded in the 1970s.

Suggested New South Wales populations: About three or four populations were suggested in the review.

New South Wales extent of occurrence: 3,427 km², based on post-1980 records.

New South Wales area of occupancy: 407 km² across four geographic populations, with component values of 8, 19, 79 and 301 km².

Distribution: Population status

The number of mature individuals in New South Wales is unknown. The review considered the species to be sparsely scattered and to have declined in parts of its mainland range.

Comparison of bird atlas records suggested that the New South Wales extent of occurrence and inferred area of occupancy had each declined by about 50% over 30 years. The available atlas data were too sparse for a statistical comparison of reporting rates.

Estimated New South Wales population: About 8,100 birds was estimated from extent, occupancy and assumed average density, but the estimate is uncertain.

Density in Nadgee and Ben Boyd: About 0.62 birds per hectare in preferred low, dry heath in the 1995 survey.

New South Wales listing: Endangered.

Commonwealth listing: Not listed under the EPBC Act in the supplied sources.

Habitat: Habitat types

The Striated Fieldwren requires low, dense vegetation with enough cover for feeding, nesting and concealment. It uses both wet and dry habitats, including sites bordering wetlands.

In New South Wales, the species is associated particularly with heathland, but also uses sedgeland, samphire and tussock grassland. These habitats commonly occur beside swamps, lagoons, saltmarsh and other wetlands.

It can occur in coastal heath, low mallee and heath in open forest, rocky rises, wind-pruned coastal scrub, and some young pine plantations in Victoria.

Habitat: Vegetation structure

Preferred New South Wales habitat is generally low, dry heath with shrubs about 0.2 to 0.5 m high, an incomplete canopy and occasional emergent shrubs up to about 1 m. At Nadgee, preferred heath was dominated by Swamp She-oak and monocotyledons, with Boronia, Dillwynia, Banksia, Darwinia and Hakea also present.

The species used low heath beside Bracelet Honey-myrtle scrub up to about 3 m high for shelter and calling perches. In one survey area, birds were not recorded in adjoining taller wet heath dominated by Scented Paperbark.

  • Retain continuous low shrubs, tussocks, sedges and ground cover rather than isolated plants only.
  • Check heath edges, wetland margins, saltmarsh, samphire and low vegetation beneath scattered emergent shrubs.
  • Treat apparently open or recently disturbed heath as potential habitat if dense ground cover remains.

Habitat: Climate and elevation

The supplied sources describe a temperate to warm temperate distribution in south-eastern Australia and Tasmania. They do not provide a confirmed elevation limit for the species.

Known climatic setting: Temperate and warm temperate south-eastern Australia.

Elevation limit: Not specified in the supplied sources.

Foraging habitat: Diet

The Striated Fieldwren feeds mainly on invertebrates in and around dense low vegetation. It forages on the ground, in low shrubs and occasionally around the foliage of taller emergent shrubs.

The diet consists mostly of insects, with some small snails and seeds. The species is classified as an insect-eating, ground-foraging bird.

Main prey: Insects.

Additional food: Small snails and seeds.

  • Retain leaf litter, low shrubs, tussocks and dense ground cover that support insects and other small prey.
  • Inspect the ground layer and the bases and lower foliage of shrubs during habitat assessment.

Foraging habitat: Foraging locations and behaviour

The species gleans food from the ground and low shrubs. At Nadgee, one bird was observed taking insects around the foliage at the top of a Furze Hakea shrub, showing that foraging is not restricted to the ground.

The species uses low, dry heath extensively. Emergent shrubs provide additional foraging surfaces and are also used for calling and escape perches.

Breeding territory: About 0.2 to 0.8 ha for a sedentary pair.

Observed density: About 0.62 birds per hectare in preferred Nadgee and Ben Boyd heath.

  • Survey low, dry heath, heath edges and shrub bands beside wetlands rather than searching only open wetland water.
  • Pause and scan the surrounding vegetation after detecting a calling bird, because a second bird may be nearby and birds may move to shrub tops after being flushed.

Breeding habitat: Breeding biology

Breeding occurs in low, dense vegetation where a concealed ground-level nest can be placed and where cover remains available for dependent young.

The nest is a dome made from plant fibres or coarse grasses, lined with feathers and down. It is placed on or near the ground, in or at the base of low shrubs or grass tussocks.

The incubation and nestling periods are estimates based on related heathwrens and the Speckled Warbler, not direct measurements for this species.

Breeding season: Late winter to summer.

Clutch size: Three or four eggs.

Incubation: Probably about 16 days.

Nestling period: Probably about 17 days.

Post-fledging dependence: Probably about one month.

Age at first breeding: About 1.2 years, according to the supplied species account.

Lifespan: Not reported. Generation length is estimated at about four years.

Breeding habitat: Breeding habitat features

Breeding habitat includes low heath, sedgeland and tussock grassland with dense ground cover. Nests are concealed beneath or within low shrubs and grass tussocks, so clearing the ground layer can remove both nest sites and cover for fledged young.

Pairs are sedentary and maintain exclusive breeding territories. Singing males in dense habitat were about 50 m apart, indicating that several territories can occur within a relatively small work area.

Territory size: About 0.2 to 0.8 ha.

Spacing of singing males: About 50 m apart in dense populations.

  • Before clearing, inspect low shrubs, tussocks and dense ground cover for domed nests at or near ground level.
  • Avoid disturbing suitable nesting cover during late winter to summer where practicable.
  • If clearing cannot be avoided, use a qualified fauna spotter catcher and follow the approved project procedure for active nests, dependent young and staged habitat removal.

Sheltering habitat: Ground and shrub cover

Shelter is provided by dense low heath, tussocks and shrub bases. The species has limited dispersal ability, so nearby cover is important when birds are flushed or when habitat is fragmented.

Birds shelter in low, dense heath and in shrub bands adjoining heath. At Nadgee, Bracelet Honey-myrtle scrub up to about 3 m high was used for shelter, while emergent shrubs within or beside the heath provided escape and calling perches.

Flushed birds commonly flew to the tops of shrubs or disappeared into the heath before reappearing nearby.

Low heath height at key Nadgee sites: About 0.2 to 0.5 m.

Emergent shrubs used for shelter and calling: Up to about 1 m within heath, with adjoining Bracelet Honey-myrtle scrub up to about 3 m.

  • Retain connected patches of low heath, tussocks and shrub bases around work areas.
  • Check shrub edges and dense vegetation for birds before machinery enters or vegetation is removed.
  • Keep retained cover connected where possible because the species is a weak, short-distance flyer.

Sheltering habitat: Nest cover

The domed nest is hidden under or within low shrubs and tussocks close to the ground. The supplied sources do not give a nest diameter or a standard search distance around a nest.

  • Search the base of dense shrubs and tussocks rather than only exposed ground.
  • Do not disturb suspected nest cover until the area has been checked under the project fauna management procedure.
  • The supplied sources do not report hollows, burrows, roosts or other specialised shelter structures for this species.

Threats: Clearing and fragmentation

The main risks are loss and fragmentation of low heath and wetland-edge vegetation, fire, introduced predators and disturbance during breeding. These risks are relevant to clearing, access tracks, utility corridors, construction compounds and fuel reduction works.

Habitat has been lost to urbanisation and agriculture. Remaining populations are sparse and fragmented, particularly between Jervis Bay and Ben Boyd National Park, and northern populations around Sydney and the Blue Mountains have disappeared from former sites.

The species is a weak, short-distance flyer with limited dispersal ability. Removing small patches or breaks in low heath can therefore isolate territories and reduce movement between populations.

Fragmentation sensitivity: The species is inferred to be susceptible to habitat and population fragmentation.

Reported range contraction in New South Wales: Extent of occurrence and inferred area of occupancy declined by about 50% over 30 years.

  • Map low, dense heath, sedgeland, samphire, tussock grassland and wetland margins before selecting clearing limits.
  • Avoid creating narrow isolated remnants or long breaks through continuous heath.
  • Keep construction access, laydown areas and temporary disturbance out of retained low heath where practicable.

Threats: Fire

Wildfire is identified as the main threat to remaining New South Wales heathland. Fire can remove the low vegetation structure used for nesting, shelter and foraging, and can reduce the insect food supply.

High frequency fire can disrupt life cycle processes and cause loss of vegetation structure and composition. Low nests are also directly vulnerable to fire.

  • Include known fieldwren habitat in project fire planning and avoid unnecessary ignition or pile burning near retained heath.
  • Assess post-fire habitat condition rather than assuming that all recently burnt heath remains suitable.

Threats: Predators and disturbance

Cats and foxes are identified threats. Ground-level nests and dependent young are exposed to predation, livestock disturbance and fire.

The supplied sources do not identify a disease as a known major threat to this species. They also do not provide species-specific evidence for road mortality or hydrology change, although roads, vehicle access and altered wetland margins can remove or divide suitable low vegetation.

  • Control access by domestic animals and manage food and waste that may attract feral predators to work areas.
  • Keep vehicles and machinery out of retained heath and wetland-edge cover except on approved access routes.
  • Schedule clearing outside the late winter to summer breeding period where practicable, and check for active nests and dependent young before disturbance.

Survey methodology: 1. Diurnal habitat and call transects

Survey effort should target low, dense vegetation where Striated Fieldwrens can be detected by sight and call. The supplied documents do not provide a current national survey guideline, so use the species information below with the relevant state survey and approval requirements.

Survey during daylight, preferably within four hours of sunrise when birds are active and calling. The species is sedentary and terrestrial, and is not suited to a spotlighting-based survey approach.

Walk fixed transects slowly through suitable heath, sedgeland, samphire, tussock grassland and coastal swamp margins. Record birds by sight and call, and pause after the first detection to scan nearby vegetation because a second bird may appear shortly afterwards.

The documented Nadgee study used nine 25 metre by 400 metre transects, walked in about one hour, and six transects 100 metres wide and 1 to 1.5 kilometres long, also walked in about one hour. These transects were surveyed between 9 and 16 October 1995, within four hours of sunrise.

Record the transect width, length, time, weather, observer, detection method, number of birds, behaviour, vegetation structure and GPS location. Treat the historical transect design as a species-specific reference, not as a substitute for the current state survey guideline.

Documented detection period: Within four hours of sunrise

Documented transect designs: 25 metres by 400 metres, and 100 metres wide by 1 to 1.5 kilometres

Documented transect duration: About one hour per transect

Historical survey timing: 9 to 16 October 1995

Survey methodology: 2. Targeted searches in suitable habitat

Search low, dense vegetation systematically, including heath about 0.2 to 0.5 metres high, low shrubs with scattered emergent shrubs, tussock grassland, sedgeland, samphire, saltmarsh and swamp edges.

Give priority to retained patches adjoining wetlands, lagoons, saltmarsh, coastal swamps and wet heath. In the Nadgee study, birds were recorded in low, dry heath dominated by Swamp She oak and monocotyledons, with emergent Hakea, Honey myrtle or Banksia shrubs used for shelter and calling.

Listen for singing males from prominent shrubs, then inspect the ground layer and shrub bases. Birds may fly briefly to the tops of shrubs after being flushed, which can assist detection.

Survey all suitable habitat patches within the disturbance footprint and connected retained habitat. Map occupied patches, likely breeding areas, movement links and areas where vegetation is too tall, wet or structurally unsuitable.

Typical NSW territory size: 0.2 to 0.8 hectares

Historical density at Nadgee and Ben Boyd: 0.62 birds per hectare, with a reported range of 0.4 to 0.9 birds per hectare

Preferred vegetation height at Nadgee: Low dry heath about 0.2 to 0.5 metres high, with emergent shrubs to 1 metre

Survey methodology: 3. Breeding and nest searches

Time targeted checks across late winter to summer where practicable, because the species may lay from late winter through summer. Avoid repeated close approaches to suspected nest sites.

Search at the base of low shrubs and grass tussocks for a domed nest made from plant fibres, coarse grasses and fibres, and lined with feathers or down. The nest is usually on or near the ground and may be concealed under tussocks or bushes.

Treat a calling adult, repeated carrying of nesting material, alarm behaviour, or a bird repeatedly entering dense ground cover as a reason for a careful nest and dependent young assessment.

If a nest or dependent young is found, mark its location from a distance, establish a site-specific exclusion area with the fauna ecologist, and reschedule or stage works where the exclusion cannot be maintained.

Breeding period: Late winter to summer

Clutch size: Three or four eggs

Estimated incubation: About 16 days

Estimated nestling period: About 17 days

Estimated post fledging dependence: About one month

Survey methodology: Minimum effort and reporting

Use the current survey guideline, threatened species licence conditions and project approval requirements for the relevant state or territory before finalising effort.

Use more than one survey visit where habitat is patchy, records are absent despite suitable habitat, or works could remove a substantial occupied patch. The supplied documents do not specify a current minimum number of project survey nights or visits for this species.

Do not use spotlighting, cage trapping or other invasive methods as the primary method for this diurnal, ground-foraging bird unless specifically justified, approved and supervised by an appropriately authorised person.

Submit confirmed records, negative survey results from suitable habitat, nest locations and mortality or injury records to the relevant state wildlife database, and retain the project data, spatial files, photographs and effort details.

  • Confirm the applicable state or territory survey guideline before fieldwork starts.
  • Document the area searched, transect dimensions, dates, start and finish times, weather, observers, detection method and survey limitations.
  • Provide all records and clearance advice to the project ecologist and approval holder before habitat disturbance begins.
  • Submit records to the relevant state wildlife database and any database specified by the project approval.

Before habitat disturbance: 1. Avoid and minimise habitat loss

The main pre clearance risk is removal or fragmentation of low, dense ground vegetation used for shelter, foraging and nesting. Plan the work around occupied habitat, breeding activity and the species' limited dispersal ability.

Retain continuous patches of low heath, sedgeland, samphire, tussock grassland and swamp edge vegetation, especially where these areas adjoin wetlands or coastal lagoons.

Avoid clearing occupied patches and retain connecting vegetation between patches. The species is a weak, short distance flyer, and NSW populations are described as fragmented and sparsely scattered.

Avoid unnecessary widening of access tracks, temporary laydown areas and drainage works through low heath. Keep retained habitat free from machinery access, spoil, lighting and weed contamination.

Use the documented NSW territory size of 0.2 to 0.8 hectares when assessing whether a proposed clearing area could remove a breeding territory, but do not treat this as a statutory buffer.

Dispersal ability: Rather weak, short distance flyer

Reported NSW extent of occurrence: 3,427 square kilometres

Reported NSW total area of occupancy: 407 square kilometres across four geographic populations

  • Redesign the footprint to retain occupied low heath and wetland margins.
  • Fence and map retained habitat before machinery arrives.
  • Keep retained patches connected wherever practicable.
  • Prevent spoil, sediment, vehicles and materials entering retained ground cover.

Before habitat disturbance: 2. Approvals and work planning

Confirm the species status in the relevant jurisdiction before works commence. The supplied NSW review records the species as Endangered in NSW and not listed under Commonwealth legislation at that time.

Check whether the current state or territory listing, threatened species licence, development consent, clearing approval or fauna handling authority applies to the project.

An EPBC Act referral is not indicated by the supplied NSW review, but the project officer must check the current national list and whether the proposed action affects any other nationally listed species or ecological community.

Prepare a fauna management plan that identifies survey timing, exclusion areas, fauna spotter catcher responsibilities, stop work triggers, handling arrangements, injury response and reporting.

  • Check the current EPBC Act list and obtain advice on referral requirements before approval decisions are finalised.
  • Check the threatened species legislation and permit requirements in the state or territory where the work occurs.
  • Include Striated Fieldwren habitat and nest protection measures in the construction environmental management plan.
  • Stage clearing so that retained habitat is available before any occupied habitat is removed.

Before habitat disturbance: 3. Pre clearance preparation

Complete a pre clearance survey of all suitable habitat in and beside the disturbance footprint using the approved method and timing.

Mark occupied habitat, suspected nests, calling territories, retained vegetation, access routes and exclusion areas on plans and on the ground.

Brief machinery operators and spotter catchers on the bird's appearance, low ground nests, likely shelter vegetation, call based detection and the procedure for an unexpected find.

Use exclusion fencing where it can protect low heath, tussock cover, nest sites or retained wetland margins. Check the fencing daily and keep it outside the root and ground cover zone that must be retained.

  • Complete the pre clearance survey before vegetation removal or ground disturbance.
  • Install and inspect exclusion fencing before machinery enters the site.
  • Provide a site induction with photographs or identification material for the species.
  • Record all pre clearance findings in a spatial register.

During habitat disturbance: 1. Daily clearance controls

Clearance must proceed slowly enough for a fauna spotter catcher to inspect the ground layer and respond to birds that flush from dense vegetation. Low nests and dependent young are the main direct handling risk identified for this species.

Conduct a daily pre start inspection of the work area, exclusion fencing, retained habitat and access routes before machinery operates.

Have an authorised fauna spotter catcher present for clearing of suitable Striated Fieldwren habitat and any staged removal of low shrubs, tussocks, sedges or heath.

Clear in small sections towards retained habitat where safe and appropriate, while keeping machinery speed low enough for the spotter catcher to inspect the area ahead of the machine.

Stop work for excessive wind, heavy rain, poor visibility or other conditions that prevent reliable detection of a small ground dwelling bird or nest.

Keep machinery, workers, spoil and vehicles outside marked exclusion areas.

  • Complete and record the daily pre start fauna inspection.
  • Use staged, supervised clearing rather than broad area removal.
  • Maintain clear communication between the operator, spotter catcher and site supervisor.
  • Stop work when the spotter catcher cannot safely inspect the next section.

During habitat disturbance: 2. Spotter catcher response

The spotter catcher should walk ahead of the clearing face, inspect tussock bases and low shrubs, and watch for birds that flush and perch on emergent shrubs.

If a Striated Fieldwren is detected, pause machinery and allow the bird to move into retained suitable habitat where possible. Do not chase it through dense vegetation or repeatedly flush it.

Do not handle the bird unless handling is necessary to prevent immediate harm and the person is authorised under the applicable permit and project procedure.

If capture is required, use the least stressful authorised method, keep handling brief, and release the bird into nearby retained habitat that has suitable low, dense cover. Record the location and reason for the move.

Take injured birds to an appropriately authorised wildlife carer or veterinarian in accordance with the permit and project fauna procedure.

  • Stop the machine when the bird is detected within or beside the clearing face.
  • Use an authorised person for any capture, handling or relocation.
  • Release a healthy bird into nearby retained habitat with suitable ground cover.
  • Arrange veterinary or wildlife carer treatment for an injured bird.
  • Record every interaction, including birds that leave without assistance.

During habitat disturbance: 3. Nests and stop work triggers

Stop work immediately if a nest, eggs, dependent young, an adult repeatedly entering a nest site, or an injured Striated Fieldwren is found in the work area.

Establish a temporary exclusion area around the find with the fauna ecologist and relevant approval conditions determining the size, duration and access controls.

Do not move an active nest, eggs or dependent young unless specifically authorised by the relevant wildlife authority and undertaken by an appropriately authorised person.

Resume work only after the fauna ecologist confirms that the exclusion, relocation or other approved action is complete and the site supervisor records the decision.

Nest position: On or near the ground, in or at the base of low shrubs or grass tussocks

Nest form: Domed structure made from plant fibres, coarse grasses and fibres, lined with feathers and down

  • Stop work for a nest, eggs, dependent young or injured bird.
  • Protect the location from people, machinery, pets and vehicle access.
  • Obtain approval before any handling or movement of eggs, young or an active nest.
  • Record the trigger, coordinates, photographs where appropriate, action taken and restart authorisation.

During habitat disturbance: 4. Habitat feature and incident records

Although this species is not associated with tree hollows, inspect and retain the low vegetation structure, tussocks, sedges, samphire and emergent shrubs that provide cover, nest sites, calling perches and foraging habitat.

Manage wetland edges carefully because the species uses heathland, sedgeland, samphire and tussock grassland bordering swamps, lagoons, saltmarsh and other wetlands.

Record cleared and retained habitat areas, bird detections, nests, handling events, injuries, deaths, stop work events, weather, machinery activity and final outcomes.

Notify the project ecologist and approval holder of any mortality, repeated displacement, nest disturbance or failure of exclusion controls.

  • Do not apply a hollow tree or artificial nest box procedure to this species unless another species requires it.
  • Protect low ground cover and emergent shrubs rather than treating the area as open ground.
  • Keep incident and clearance records suitable for audit and statutory reporting.
  • Update the site map after every fauna find or change to an exclusion area.

After habitat disturbance: 1. Post clearance checks

Post clearance work should confirm that no birds, nests or dependent young remain in the disturbed area and that retained habitat remains usable. Monitoring should focus on occupancy, vegetation structure, connectivity and threats identified for NSW populations.

Inspect the cleared area and the edge of retained habitat at the end of each clearing shift and again after the final clearance pass.

Search disturbed ground, remaining tussocks, low shrubs and machinery routes for injured birds, nests, eggs or dependent young.

Check exclusion fencing, sediment controls, access barriers and retained habitat for damage caused by machinery or follow on contractors.

If a bird is found after machinery has left, apply the same authorised handling, veterinary and reporting procedure used during clearance.

  • Complete a documented post clearance fauna check.
  • Inspect all retained habitat edges and exclusion controls.
  • Report any injured or dead bird immediately.
  • Repair damaged controls before further work continues.

After habitat disturbance: 2. Monitoring and reporting

Monitor retained and rehabilitated low vegetation for Striated Fieldwren presence using repeated daylight searches and call based transects within four hours of sunrise.

Use the same transect locations, widths, timing and detection records where possible so that changes in occupancy and detectability can be compared over time.

Pay particular attention to habitat patches that have been narrowed, isolated, burnt, weed invaded or exposed to increased cats, foxes or human access.

Report survey effort, detections, nests, mortality, habitat loss, rehabilitation results and any non compliance to the project approval holder and relevant regulator.

Historical NSW reporting pattern: Reporting rates approximately halved at Nadgee between the first and second national bird atlases, although the source notes that the atlas data were too limited for a statistical comparison

Known NSW population estimate in the review: About 8,100 birds, based on assumptions about density and occupied area

  • Set monitoring locations before construction finishes.
  • Repeat surveys at the frequency required by the approval or fauna management plan.
  • Compare results with the pre clearance baseline using the same methods where practical.
  • Submit confirmed records and significant incidents to the relevant state wildlife database.

After habitat disturbance: 3. Maintain controls and offsets

Maintain exclusion fencing, access controls, weed controls, predator controls and drainage protections until the retained and rehabilitated habitat is stable and the approval conditions allow removal.

If the project cannot avoid loss of occupied habitat, implement the approved offset, restoration or conservation measure for the relevant jurisdiction.

Do not claim that an offset replaces avoidance of occupied low heath, because the species has limited dispersal ability and fragmented populations may not be readily recolonised.

  • Keep habitat protection controls in place for the period specified in the approval.
  • Complete any required offset or conservation action before the relevant approval milestone.
  • Document the area, condition and tenure of any offset or retained habitat.
  • Review controls after fire, flooding, weed spread, predator incursions or further construction.

Rehabilitation actions: 1. Restore species habitat structure

Rehabilitation should recreate the low, dense ground structure used for shelter, foraging, calling and nesting. It should reconnect retained patches and manage fire, weeds, cats and foxes over the period needed for the vegetation to become suitable.

Reinstate low, dense native heath, sedgeland, samphire and tussock vegetation on disturbed areas adjoining wetlands, lagoons, saltmarsh and coastal swamps.

Use locally appropriate native plant species and forms that recreate dense ground cover, low shrubs and scattered emergent shrubs. The supplied documents identify Swamp She oak, Hakea, Honey myrtle, Banksia, Boronia, Dillwynia and Darwinia as plants recorded in occupied Nadgee habitat.

Design rehabilitation to include low vegetation about 0.2 to 0.5 metres high, with some emergent shrubs up to about 1 metre where consistent with the local reference community.

Do not rely on tree hollows, nest boxes, rock piles or log placement as the primary rehabilitation treatment for this species, because the documented nest and habitat features are ground level vegetation rather than hollows.

Recorded Nadgee habitat plants: Swamp She oak, Hakea, Honey myrtle, Banksia, Boronia, Dillwynia and Darwinia

Target structural reference: Low dry heath about 0.2 to 0.5 metres high, with emergent shrubs to 1 metre

  • Use local provenance native plants suited to the retained heath or wetland community.
  • Recreate dense ground cover, low shrubs and scattered emergent shrubs.
  • Protect newly planted areas from vehicles, grazing and trampling.
  • Remove weeds before they dominate the ground layer.

Rehabilitation actions: 2. Reconnect and protect rehabilitated patches

Place rehabilitation beside retained occupied or potentially suitable habitat so that birds can move through continuous or closely connected ground cover.

Avoid creating narrow strips exposed to machinery, frequent mowing, intense lighting, domestic animals or high edge disturbance.

Manage weeds, cats and foxes because weed invasion and predation by European Foxes and feral Cats are identified threats in NSW.

Prevent altered drainage, sediment deposition and inappropriate fire from removing the low vegetation structure required by the species.

  • Link rehabilitation areas to retained low heath wherever practicable.
  • Install long term access barriers where repeated vehicle entry would damage ground cover.
  • Include cat and fox control where required by the fauna management plan or approval.
  • Inspect for weed invasion, erosion, grazing and predator activity.

Rehabilitation actions: 3. Fire and wetland management

Prepare a fire management approach that protects suitable heath and avoids high frequency fire that disrupts plant and animal life cycle processes and removes vegetation structure.

Use local fire ecology advice before planned burning, because the source documents identify wildfire as a major threat but do not provide a species specific fire interval.

Retain a range of wet and dry low vegetation where practicable, including swamp edges, sedgeland, samphire and tussock grassland bordering wetlands.

After fire, inspect for surviving birds and assess whether the ground layer, shrub cover and food resources remain suitable before declaring rehabilitation successful.

  • Obtain fire authority and ecological advice before any planned burn.
  • Prevent unauthorised burning and manage ignition risks during construction.
  • Protect wetland hydrology and avoid draining or filling suitable swamp margins.
  • Record fire extent, intensity, date and subsequent vegetation recovery.

Rehabilitation actions: 4. Measure rehabilitation success

Monitor vegetation cover, shrub height, weed cover, wetland edge condition, connectivity and signs of cat or fox activity at fixed locations.

Use daylight call and sight transects within four hours of sunrise to check whether Striated Fieldwrens use the rehabilitated area. Record effort and detection rates so results can be compared with the pre clearance survey.

Use occupancy, repeated detections, evidence of breeding activity and recovery of suitable ground structure as success measures rather than planting numbers alone.

Continue monitoring until the approved success criteria are met and the habitat supports low, dense cover comparable with the local reference habitat.

Historical reference density: 0.62 birds per hectare in low heath at Nadgee and Ben Boyd, based on the 1995 study

Historical stronghold density cited in the NSW review: 0.6 bird per hectare at Nadgee Nature Reserve and Ben Boyd National Park

  • Set measurable vegetation and fauna criteria before rehabilitation begins.
  • Repeat surveys using consistent transects, timing and observers where possible.
  • Record the first confirmed use of the rehabilitated area and any nest or dependent young observations.
  • Apply corrective actions if ground cover fails, weeds increase, predators persist or the area remains isolated.

Sources