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Spinifexbird (Poodytes carteri)

The Spinifexbird is a small, secretive Australian passerine associated mainly with dense spinifex, especially Triodia grasslands in arid and semi-arid inland areas. On development sites, clearing, vehicle access and fire can remove the dense ground cover used for feeding, shelter and nesting, so intact spinifex patches should be retained and checked before disturbance.

Conservation status

South Australia, National Parks and Wildlife Act 1972: Endangered.

Breeding season

The following pattern is based on the documented August to November breeding season and the species' generally sedentary behaviour. Timing may vary between sites, particularly where rainfall changes food availability and bird abundance.

Confirm local breeding activity before clearing. The species may be difficult to detect because it is secretive and associated with dense cover.

  • Breeding: Breeding is documented from August to November. Nests are shallow cups in Triodia clumps close to the ground.
  • Young: Eggs and dependent young may be present in concealed ground-level nests during the August to November breeding period. The supplied documents do not give incubation or fledging durations.
  • Movement or dispersal: The species is described as sedentary. Rainfall can change bird abundance and resource availability in arid areas, but no regular migration or dispersal season is documented.
  • Highest clearing risk: Risk is highest from August to November because breeding birds, eggs and dependent young may be present in low nests within Triodia clumps.

Identification

The Spinifexbird is a secretive, spinifex-associated bird that is often detected in dense Triodia rather than in open areas. Its appearance and low, weak flight are useful identification features, but observers should avoid flushing birds repeatedly from cover.

Adults have a rich brown cap, golden-brown wings with streaking and a long tail. Males and females have similar plumage.

The tail commonly droops during flight, and the bird has a weak flight style. It is often encountered alone in spinifex.

Diagnostic plumage: Rich brown cap and golden-brown, streaked wings.

Tail: Long and often drooping during flight.

Sexes: Male and female plumage is similar.

Identification: Similar species and survey use

The supplied documents do not provide a formal comparison with similar Australian grassland birds, measurements, calls or a diagnostic key. In the field, confirm records using the combination of brown cap, streaked golden-brown wings, long drooping tail, weak flight and close association with Triodia.

Record the exact spinifex patch, bird behaviour, direction of movement and photographs where possible. Avoid relying on a brief flight view alone, particularly where other brown grassland birds are present.

Identification: Field signs

The known nest is a shallow cup in a Triodia clump, close to the ground, and usually contains two eggs. A nest search should be limited and undertaken by suitably authorised personnel because the nest is concealed within dense grass.

No species-specific tracks, scats, calls, roost signs or eyeshine characteristics are described in the supplied documents.

Nest location: Within a Triodia grass clump, close to the ground.

Nest form: Shallow cup.

Distribution: National range

The Spinifexbird is endemic to inland Australia. The supplied records show a broad inland distribution, with populations or records extending from central Australia to western Queensland and to offshore islands in Western Australia.

The species occurs in arid and semi-arid inland regions of Australia. It is recorded in central Australia and western Queensland, where western Queensland is described as the eastern edge of its extensive inland distribution.

The supplied material also records the species from more than a dozen Western Australian islands, including Barrow, Boodie, Dixon, Dolphin, Double, Long in the Passage Islands, North Muiron, South Muiron, Scholl and Thevenard, as well as about seven islands in the Montebello group.

States and territories represented in the supplied sources: Western Australia, Queensland and central Australian regions. The supplied project information also identifies South Australia as a state where the species is listed as Endangered.

Bioregional settings named in the sources: Desert Uplands and adjacent western Queensland grasslands, plus central Australian arid areas.

  • Treat inland Triodia habitat as potential habitat during project planning, even where the species has not previously been recorded.
  • Check island and mainland records separately because the genetic relationship between populations is not known.

Distribution: Strongholds and subpopulations

Edgbaston Reserve in central-western Queensland is a documented stronghold or important local area. The Spinifexbird was commonly recorded in extensive, long-unburnt Giant Grey Spinifex, Triodia longiceps, grasslands associated with the spring complex.

The species also has mainland and island occurrences in Western Australia. It disappeared from the Montebello Islands sometime after 1950 and was absent until birds were translocated from Barrow Island in 2010 to 2011.

Population size: No national or regional population estimate is provided.

Population trend: No population trend is provided for the species as a whole.

Genetic structure: Genetic diversity and phylogeographic differences between the Barrow Island population and other populations are unknown.

Habitat: Overall habitat

The Spinifexbird is a specialist of dense spinifex grasslands. Habitat value is linked to the amount, continuity and condition of Triodia cover, particularly where the grass is long unburnt and provides a closed ground layer.

The main habitat is arid interior spinifex or Triodia grassland. At Edgbaston Reserve, the species was most abundant in the Spinifex habitat and was recorded in extensive Giant Grey Spinifex grasslands.

The species was positively associated with increasing spinifex cover in site-level analysis. Spinifexbird abundance was highest in the Spinifex habitat, with a reported mean of 40.3 birds plus or minus 5.2 in the habitat comparison presented in the source.

Key vegetation: Triodia grasslands, including Giant Grey Spinifex, Triodia longiceps.

Habitat association: Positive relationship with increasing spinifex cover.

Edgbaston habitat result: Spinifexbird was the only species most abundant in the Spinifex habitat in the cited habitat comparison.

  • Map all Triodia patches before clearing, including patches that appear isolated or are surrounded by Mitchell grassland.
  • Retain connected, dense spinifex cover where practicable, especially long-unburnt patches and spinifex near reliable water sources.

Habitat: Structural features

Dense grass clumps provide the cover used for nesting and are likely to be important for concealment and movement. The strongest site association described in the supplied material is with spinifex cover rather than tree cover.

Springs and other reliable water sources occur within some spinifex areas and can support birds during dry periods. The supplied studies do not establish a specific distance from water required by Spinifexbirds.

Habitat: Elevation and climate limits

No elevation limits are given. The species is described as an arid interior specialist and is associated with central Australia and western Queensland.

Foraging habitat: Food and feeding sites

The Spinifexbird feeds within the spinifex grasslands that also provide cover. The supplied sources identify insects and seeds as food but do not describe a measured foraging range or detailed feeding technique.

The diet consists of insects and seeds. Foraging occurs in spinifex grasslands, where the grass provides both food resources and shelter.

At Edgbaston, Spinifexbird abundance increased with increasing spinifex cover. This supports retaining dense ground cover rather than clearing narrow strips through otherwise suitable patches.

Recorded food types: Insects and seeds.

Foraging habitat: Spinifex and Triodia grasslands.

Foraging range: Not reported in the supplied documents.

  • Inspect dense Triodia before slashing, grading or vehicle access because birds may remain concealed until disturbed.
  • Keep cleared edges as narrow as practicable and avoid creating unnecessary breaks through continuous spinifex.

Breeding habitat: Breeding biology

Breeding occurs in dense Triodia close to the ground. The nest is concealed within a grass clump, so apparently unoccupied spinifex should not be assumed to be free of breeding activity during the breeding season.

The breeding season extends from August to November. The nest is a shallow cup within a Triodia clump close to the ground, and a typical clutch contains two eggs.

The supplied documents do not provide information on mating behaviour, incubation period, fledging period, age at maturity or lifespan.

Breeding season: August to November.

Nest site: A shallow cup within a Triodia clump, close to the ground.

Clutch size: Typically two eggs.

Incubation: Not reported in the supplied documents.

Age at maturity: Not reported in the supplied documents.

Lifespan: Not reported in the supplied documents.

Breeding habitat: Features needed for breeding

Breeding habitat requires Triodia clumps that are sufficiently dense to conceal a low nest. Long-unburnt spinifex is an important habitat feature at the documented Edgbaston site, although the supplied sources do not quantify a minimum clump size or age of vegetation required for nesting.

  • Schedule clearing and high-disturbance work outside August to November where practicable.
  • Before disturbance in suitable spinifex, use an ecologist or authorised fauna spotter to check dense clumps for nests and dependent birds.
  • Do not clear a nest or its immediate cover without the approvals and controls required by the relevant state or territory legislation.

Sheltering habitat: Ground cover refuge

Dense Triodia is the principal sheltering structure described for the species. No burrow, hollow, roost, den or refuge dimensions are provided.

Spinifex clumps provide cover for a secretive bird with weak flight. The same clumps are used for nesting, with nests placed close to the ground.

The supplied sources do not describe roost sites, burrows, hollows, refuge dimensions or daily shelter distances.

Known refuge type: Dense Triodia or spinifex clumps.

Refuge size: Not reported in the supplied documents.

Roost or den: No separate roost or den is described.

  • Retain intact clumps and avoid storing materials, parking vehicles or placing temporary facilities on dense spinifex.
  • Use low-impact access routes through already disturbed ground where possible.
  • After fire or mechanical disturbance, check adjacent unburnt Triodia because birds may be concentrated in remaining cover.

Threats: Clearing and fragmentation

The main project risk is the removal or degradation of dense Triodia habitat, particularly long-unburnt spinifex used for shelter and nesting. Species-specific evidence for roads, predators and disease is limited in the supplied documents, so controls should focus first on avoiding habitat loss and disturbance.

Clearing spinifex removes feeding, sheltering and nesting habitat. Fragmenting extensive Triodia patches may reduce the amount of usable cover, although the supplied documents do not quantify a minimum patch size or isolation distance.

At Edgbaston, Spinifexbird abundance was strongly positively related to spinifex cover, and the species was most abundant in the Spinifex habitat.

  • Avoid clearing intact Triodia where an alternative footprint is available.
  • Keep infrastructure on existing disturbed areas and maintain continuous spinifex between retained patches.
  • Use pre-clearing surveys in all suitable Triodia, not only where previous records exist.

Threats: Fire and ground disturbance

The species is commonly recorded in long-unburnt Giant Grey Spinifex at Edgbaston. Frequent or intense fire may reduce the dense cover used by the species, although a species-specific fire interval is not provided.

Slashing, grading, trenching and repeated vehicle movements can remove or open spinifex cover and may destroy low nests during August to November.

  • Avoid planned burning and broad mechanical disturbance in occupied or potentially occupied spinifex during the breeding season.
  • Maintain unburnt refuge patches where fire is required for safety or ecological management.
  • Record the extent, condition and recent fire history of retained Triodia.

Threats: Roads, predators, disease and hydrology

The supplied documents do not identify a quantified road mortality rate, predator impact, disease threat or hydrology threshold for the Spinifexbird.

Springs can provide reliable resources for birds during dry periods, but the specific dependence of Spinifexbirds on spring water and the effects of altered groundwater or surface water are not established in the supplied sources.

  • Limit night and off-road vehicle use through intact spinifex and apply project speed controls where fauna movement is possible.
  • Prevent rubbish, food waste and construction materials from attracting introduced predators.
  • Avoid altering springs, drainage lines or surface flows within or adjoining spinifex without assessing potential effects on retained habitat.
  • Treat any observed nest loss, road mortality, predator concentration or unusual mortality as a reportable project fauna incident under the site management plan.

Threats: Island populations

Western Australian island populations have unresolved genetic relationships with mainland populations. The supplied genetic assessment recommends caution with mixed-source translocations because available information is insufficient.

This issue is most relevant to island works, translocations and fauna relocation programs rather than routine mainland clearing.

  • Do not mix island and mainland birds in a relocation or translocation program without advice from the relevant conservation authority.
  • Obtain project-specific approval and genetic advice before moving Spinifexbirds between islands or between islands and the mainland.

Survey methodology: 1. Targeted habitat searches

The Spinifexbird is a secretive, sedentary bird of Triodia grasslands. Survey work should focus on intact, mature spinifex, particularly dense stands that may support nests close to the ground.

Search all Triodia grassland that may be cleared, including edges, access tracks, laydown areas and temporary work zones.

Walk slowly through suitable spinifex and record birds, calls, nests, tracks of disturbance and the condition and continuity of the grass cover.

Give priority to intact and long-unburnt Giant Grey Spinifex grasslands where that habitat occurs.

Record the location of every observation with a GPS, the Triodia species if known, the approximate cover and height of the grass, and the direction of travel or flight.

Key habitat: Triodia spinifex grasslands, including Giant Grey Spinifex grasslands in western Queensland and central Australia

Detection notes: The species is secretive, often solitary, has weak flight and a characteristically drooping tail

Breeding period: August to November

Survey methodology: 2. Transect and point searches

Use repeat walking transects and fixed observation points through each distinct patch of Triodia habitat, with coverage of patch interiors and edges.

Survey during periods when birds are active and visibility is adequate, and repeat visits across different suitable weather conditions because detection may be low.

Use quiet observation and allow time to detect birds moving through the grass, rather than relying only on birds flying above the vegetation.

Treat a failure to detect the species as inconclusive where dense spinifex is present or access has been limited.

Published survey context: At Edgbaston Reserve, the species was recorded in five surveys from October 2018 to October 2020 and was most abundant in Spinifex habitat

Published Spinifex result: Mean abundance in Spinifex habitat was 40.3 ± 5.2 in the reported survey table; this is a site-specific survey result, not a population density estimate

  • Record the search route, start and finish times, duration, weather, wind, recent fire, grazing or other disturbance, and the area searched.
  • Separate records from Spinifex habitat from records in Mitchell grass, woodland, spring and other vegetation types.

Survey methodology: 3. Breeding-season nest searches

During August to November, inspect suitable Triodia clumps for shallow cup-shaped nests close to the ground.

Keep observers and equipment outside the clump where possible, and do not repeatedly enter a nest area or handle eggs, nestlings or adults unless authorised under the applicable wildlife requirements.

Mark any nest location discreetly and establish a project exclusion area that prevents machinery, vehicles and unnecessary pedestrian access.

Recheck the exclusion area before work resumes after rain, fire, overnight disturbance or a change in the work footprint.

Nest: A shallow cup-like nest placed within a Triodia grass clump close to the ground

Typical clutch: Two eggs

  • Use an experienced ecologist or fauna spotter catcher for nest searches in dense spinifex.
  • Record the nest location, condition, evidence of use, nearby disturbance, the surrounding Triodia condition and any adult behaviour without approaching unnecessarily.

Survey methodology: Minimum effort and reporting

  • Use a qualified ecologist to prepare a site-specific survey plan where the project will remove or fragment Triodia habitat, because the supplied documents do not provide a formal national Spinifexbird survey effort guideline.
  • Repeat searches where the first survey was undertaken in poor weather, after substantial rain, after fire, or before the August to November breeding period when breeding evidence is required.
  • Map all suitable habitat, observations, nests, areas searched and areas not searched, and retain the raw GPS and survey effort data.
  • Report the species as Poodytes carteri and note that the species is not listed under the EPBC Act in the supplied information but is listed as Endangered in South Australia.
  • Submit confirmed records and relevant survey data to the relevant state or territory wildlife database, and meet any project approval or permit reporting conditions.
  • Report the survey dates, observers, methods, effort, weather, habitat condition, detection limitations, photographs and management recommendations.

Before habitat disturbance: Avoid and minimise

Plan the project around retention of Triodia habitat and early detection of breeding birds. The species depends strongly on spinifex cover, and clearing can remove both shelter and near-ground nesting sites.

  • Avoid clearing intact, mature and long-unburnt Triodia wherever practicable.
  • Retain the largest connected blocks of spinifex and avoid creating narrow isolated remnants between the work area and retained habitat.
  • Keep vehicle access, stockpiles, compounds, drainage works and temporary disturbance out of retained Triodia.
  • Retain dense spinifex clumps within the work area until surveys and any breeding assessment are complete.
  • Design crossings and construction limits to reduce the length and width of cleared edges through spinifex.

Before habitat disturbance: Approvals and timing

  • Check the current federal and state or territory status before works start, because the supplied information identifies the species as not listed under the EPBC Act and Endangered in South Australia.
  • Obtain any state or territory wildlife permits, scientific permits, animal ethics approvals or fauna handling authorisations required for the project.
  • Schedule clearing outside August to November where practicable, particularly where dense Triodia will be removed.
  • If clearing during August to November cannot be avoided, complete targeted nest searches and include a breeding-bird response procedure in the fauna management plan.
  • Refer the project under the EPBC Act if another protected matter may be affected or if the species status has changed since the project assessment.

Before habitat disturbance: Site preparation

  • Complete a pre-clearance inspection immediately before clearing and after any material change to the work area.
  • Mark no-go areas, retained Triodia, nest exclusion areas, access routes and the approved clearing boundary on plans and on the ground.
  • Use exclusion fencing where it can prevent machinery, vehicles and workers entering retained spinifex or a nest exclusion area.
  • Brief all operators on the species' weak flight, low nesting position, secretive behaviour and the stop-work procedure.
  • Keep a fauna spotter catcher or suitably authorised wildlife professional available for clearing that may affect occupied habitat.

During habitat disturbance: Daily controls

Clearing should proceed in small, controlled stages with an authorised fauna spotter catcher directing machinery. The species may remain concealed in spinifex until the clump is disturbed.

  • Inspect the approved clearing boundary, exclusion fencing, retained spinifex and any known nest area at the start of each workday.
  • Clear only the area released by the fauna spotter catcher and keep machinery within the marked footprint.
  • Use staged clearing so birds have an opportunity to move into nearby retained Triodia before the next section is disturbed.
  • Work at a speed that allows the spotter catcher to see birds moving through or flushing from the grass.
  • Stop work during poor visibility, unsafe conditions or any situation in which the spotter catcher cannot control the clearing operation.

During habitat disturbance: Fauna spotter catcher response

  • The spotter catcher should walk or inspect the next clearing section before machinery enters it, with particular attention to dense Triodia clumps and low nests.
  • Direct the operator to stop immediately if a Spinifexbird, nest or other fauna is detected within the clearing path.
  • Do not chase, net or handle an adult Spinifexbird unless the person is authorised and handling is necessary and lawful.
  • Allow an uninjured bird to move into nearby retained Triodia where this can occur safely and without forcing it into the work area.
  • Use an appropriately ventilated, quiet container only when authorised handling is required, and minimise handling time and heat exposure.
  • Take an injured bird to a veterinarian or authorised wildlife carer through the project fauna procedure.

During habitat disturbance: Habitat features and stop-work triggers

  • Treat occupied or potentially occupied Triodia clumps as habitat features and retain them unless the approved fauna procedure specifically permits removal.
  • Stop work if a Spinifexbird, active nest, dependent young or injured bird is found in the work area, or if the approved clearing boundary is breached.
  • Stop work if fire, smoke, vibration, dust, vehicle movement or other activity is entering a marked nest exclusion area.
  • Do not assume that hollow-bearing trees, logs, rocks, burrows or wetlands are Spinifexbird habitat features, but manage them for other fauna under the project fauna plan.
  • If a nest or young bird is found, establish or extend an exclusion area and obtain advice from the project ecologist and the relevant wildlife authority before restarting.

During habitat disturbance: Records and incident reporting

  • Record every sighting, nest, flush response, handling event, injury, release location, mortality and stop-work event on the day it occurs.
  • Record the time, GPS location, habitat condition, work activity, machinery involved, action taken and the names and authorisations of personnel involved.
  • Photograph habitat and nests from a distance where this can be done without causing disturbance.
  • Notify the project environmental officer and regulator where required by the approval, permit or fauna management plan.
  • Submit confirmed occurrence records to the relevant state or territory wildlife database.

After habitat disturbance: Post-clearance checks

Post-clearance checks should confirm that no bird, nest or retained habitat was affected outside the approved footprint. Monitoring should focus on the condition and continuity of remaining Triodia.

  • Inspect the cleared boundary and retained Triodia immediately after each clearing stage for trapped, injured or displaced fauna.
  • Check nest exclusion areas and nearby retained spinifex for disturbance, damaged clumps, vehicle entry and evidence of continued bird use.
  • Complete a final fauna inspection before demobilising the spotter catcher from each work area.
  • Escalate any mortality, injury, nest damage or clearing outside the approved boundary under the project's incident procedure.

After habitat disturbance: Monitoring and controls

  • Monitor retained Triodia where the project has removed adjacent cover, altered access, increased dust or changed fire or grazing conditions.
  • Repeat targeted bird searches during the next suitable breeding period, August to November, where the project has removed or fragmented substantial spinifex habitat.
  • Maintain exclusion fencing, no-go markers, access controls and weed controls until the environmental officer confirms that they are no longer needed.
  • Compare post-work observations with pre-work records using the same habitat categories and search methods where practicable.

After habitat disturbance: Reporting and offsets

  • Provide the final report to the approval holder and relevant regulator where required, including cleared area, retained Triodia, survey effort, observations, incidents and rehabilitation actions.
  • Update the relevant state or territory wildlife database with verified records and the coordinates of any active nest or important retained habitat.
  • Check whether state approval conditions require offsets, rehabilitation commitments or additional monitoring for removal of Endangered species habitat in South Australia.
  • Do not describe a proposed offset as replacing retained habitat unless the approval specifically permits that approach.

Rehabilitation actions: Restore spinifex habitat

Rehabilitation should restore continuous Triodia cover and the near-ground structure used for shelter, foraging and nesting. The supplied documents do not identify a specific planting list or a Spinifexbird nest-box requirement.

  • Use locally appropriate Triodia species and local provenance seed or material selected with the land manager and restoration ecologist.
  • Restore dense, continuous spinifex cover across temporary work areas, rather than establishing isolated grass clumps separated by bare ground.
  • Match the composition and structure of rehabilitation to nearby intact Triodia, including surface cover, clump spacing and ground protection.
  • Keep temporary access tracks and stockpile areas out of rehabilitation zones once construction is complete.
  • Do not plant trees or shrubs into areas that are being restored as open spinifex grassland unless they are part of the pre-existing vegetation community.

Rehabilitation actions: Protect and manage restored areas

  • Control weeds that reduce Triodia cover or alter the open grassland structure.
  • Manage grazing, vehicle access and erosion so new spinifex clumps can establish without repeated damage.
  • Develop a fire regime with the land manager that maintains suitable spinifex cover and avoids burning all connected habitat at once.
  • Retain natural Triodia clumps, logs and surface shelter that remain after construction, but do not add hollow logs, rocks or nest boxes as Spinifexbird measures unless site assessment shows they benefit other target fauna.
  • Prevent artificial lighting, rubbish and introduced predators from increasing disturbance around retained and rehabilitated spinifex.

Rehabilitation actions: Success monitoring

Species response to spinifex: Abundance had a positive relationship with increasing spinifex cover in the Edgbaston study

Foraging habitat: The species eats insects and seeds and forages in spinifex grasslands

  • Inspect rehabilitation after establishment, after major rainfall or drought, and during August to November to assess cover, clump persistence and use by Spinifexbirds.
  • Measure the area and continuity of Triodia cover against the approved rehabilitation target and nearby reference habitat.
  • Record Spinifexbird detections, breeding evidence, fire history, weed cover, grazing pressure, erosion and rework requirements.
  • Replace failed plants or reseed bare areas where rehabilitation does not provide continuous shelter and foraging cover.
  • Continue monitoring until the project ecologist and approval holder agree that the habitat is stable and management controls can be reduced.

Sources