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Purple-gaped Honeyeater (Lichenostomus cratitius)

The Purple-gaped Honeyeater is a small honeyeater of semiarid southern Australia. It uses mallee woodland, tall heath and associated low eucalypt woodland, and may be encountered on projects that clear or fragment these habitats. It is listed as Vulnerable in New South Wales and Victoria, although it is not listed under the EPBC Act.

Conservation status

New South Wales, Biodiversity Conservation Act 2016: Vulnerable.

Victoria, Flora and Fauna Guarantee Act 1988: Vulnerable.

Breeding season

A month-specific breeding calendar is not provided in the supplied documents. The species is not described as migratory, and banding information indicates mainly short-distance movement. The calendar below therefore marks all months as possible presence and potential clearing risk, without assigning a peak breeding month.

Confirm local breeding timing through pre-clearing surveys, repeated observations and consultation with the relevant state authority or regional ecologist. The available documents do not support a more precise month-by-month calendar.

  • Breeding: Breeding season is not specified. Honeyeater breeding is generally linked to food availability, so breeding may vary with flowering and rainfall.
  • Eggs and nestlings: A supported nest, clutch of about 2 eggs and incubation of about 13.7 days are documented, but the months of nesting are not given.
  • Dependent young: The supplied documents do not provide fledging or post-fledging dependency dates. Treat occupied habitat as potentially supporting dependent young whenever active breeding is detected.
  • Local movement: Banding information indicates short-distance movement. The species is not described as undertaking regular long-distance migration.
  • Highest clearing risk: No peak risk months can be assigned from the supplied evidence. Clearing can remove year-round feeding and shelter habitat, and may harm nests or dependent young whenever breeding is occurring.

Identification

The supplied documents provide limited plumage and call information for this species. Identification should therefore use an Australian bird field guide, photographs, recordings and, where necessary, an experienced ornithologist, especially in mallee habitat where several honeyeaters may occur.

The Purple-gaped Honeyeater is a small honeyeater weighing about 19.8 g. It is almost phenotypically invariant across most of its range. Two weakly differentiated subspecies are recognised: Lichenostomus cratitius cratitius on Kangaroo Island and Lichenostomus cratitius occidentalis on the mainland.

Body mass: 19.8 g

Family: Meliphagidae

Identification: Similar species and field confirmation

The Yellow-tufted Honeyeater, Lichenostomus melanops, is the sister species identified in the genomic study and may require careful comparison where their ranges or habitats overlap. The supplied documents do not provide diagnostic plumage, bill, call or sex-specific characters for separating the two species.

Do not rely on the common name alone during salvage or clearance surveys. Confirm records with clear photographs, an audio recording, or a suitably qualified observer, and retain the location, date, habitat description and behaviour with the record.

Identification: Field signs

The species is a supported-nest breeder. A nest should therefore be searched for in standing shrubs or other vegetation rather than in tree hollows or burrows.

The supplied documents do not describe species-specific tracks, scats, calls, nest materials or other field signs. Honeyeaters generally feed from outer foliage and flowers, and may take insects by hawking or gleaning, but these behaviours are not diagnostic on their own.

  • Treat a small cup nest supported by standing vegetation as a potential Purple-gaped Honeyeater nest until identified.
  • Use direct observation, photographs and call recordings to support records during pre-clearing surveys.
  • Record nearby flowering plants, fruiting plants and dense mallee or heath structure when the species is detected.

Distribution: National range

The Purple-gaped Honeyeater occurs in semiarid southern Australia. Its distribution is naturally fragmented by the Nullarbor and Eyrean barriers, with additional isolation on Kangaroo Island.

The documented range extends across southern Australia, including mainland populations in Western Australia, South Australia, Victoria and New South Wales, together with the isolated Kangaroo Island population. The species is associated with mallee and related shrubland habitats rather than a single continuous belt of vegetation.

In the Murray Darling Depression bioregion, the species is treated as a mallee-dependent member of the Mallee Bird Community. The relevant mallee country includes the Victorian Mallee, the South Australian Murray Darling Basin, western New South Wales and adjoining mallee areas.

Distribution: Subpopulations and strongholds

Kangaroo Island is a recognised isolated population. Mainland populations occur west and east of the Nullarbor Barrier, although genomic data show little geographical structure across most of the sampled mainland range. The study found low within-species genetic differentiation and evidence consistent with gene flow across parts of the range.

Within the Mallee Bird Community assessment area, reporting rates were higher in intact mallee Key Biodiversity Areas than in fragmented mallee for many species. For the Purple-gaped Honeyeater, the reported rates were low and similar in intact and fragmented areas, at 0.39 percent in Key Biodiversity Areas and 0.31 percent outside them for 2010 to 2019.

Reporting rate in mallee Key Biodiversity Areas, 2010 to 2019: 0.39 percent

Reporting rate outside mallee Key Biodiversity Areas, 2010 to 2019: 0.31 percent

Within-species FST: 0.01

Distribution: Conservation status and trend

The species is listed as Vulnerable in New South Wales and Victoria. It is not listed under the EPBC Act in the supplied information.

A Birdlife Australia analysis reported no trend for the Purple-gaped Honeyeater over 1999 to 2013. The Mallee Bird Community assessment found that the species persisted in fragmented mallee, but at low reporting rates. These reporting rates indicate detectability and relative occurrence, not a population census.

EPBC Act: Not listed

New South Wales: Vulnerable

Victoria: Vulnerable

Population estimate: Not provided in the supplied documents

Reported trend, 1999 to 2013: No trend noted

Habitat: Habitat types

The species is associated with semiarid mallee systems and adjoining low woodland and heath habitats. Habitat suitability depends on vegetation structure and the availability of flowering, fruiting and seed-producing plants.

The species occurs in mallee woodlands, tall heath and associated low eucalypt woodlands. In the Murray Darling Depression, it is a mallee-dependent species of the Mallee Bird Community.

Relevant mallee vegetation includes mallee woodlands and shrublands with a more developed tree canopy, and mallee open woodlands and sparse mallee shrublands with a very open to sparse canopy.

  • Mallee woodland and shrubland.
  • Open mallee woodland and sparse mallee shrubland.
  • Tall heath.
  • Low eucalypt woodland associated with mallee.

Habitat: Structural features

Retain standing shrubs and other vegetation that can support nests. Maintain a mix of canopy, mid-storey and understorey vegetation because the species uses outer foliage and depends on plant resources that vary with vegetation age and rainfall.

In mallee systems, vegetation structure changes substantially after fire. Purple-gaped Honeyeater density was reported to peak in vegetation about 10 to 30 years after fire, when vegetation is taller and denser.

Reported fire-age association: Occurrence or density peaks in vegetation about 10 to 30 years after fire

  • Retain connected patches of mature and mid-successional mallee.
  • Avoid removing dense shrub layers during the breeding period where occupied habitat is present.
  • Retain flowering, fruiting and seed-producing plants within and beside the work area.
  • Avoid creating broad areas of uniform post-fire vegetation.

Habitat: Climate and elevation

The species is described as occurring in semiarid southern Australia. The supplied documents do not provide an elevation range or a defined upper or lower climatic limit.

Climate zone: Semiarid southern Australia

Elevation range: Not provided

Foraging habitat: Food

The Purple-gaped Honeyeater has a broad diet for a honeyeater. It uses mallee and associated woodland and heath vegetation for nectar, pollen, fruit, seeds and invertebrates.

The documented diet includes fruit, nectar and pollen, seeds, and invertebrates. The supplied documents do not identify particular plant species that are used consistently by the Purple-gaped Honeyeater.

As a honeyeater, it is likely to take nectar and pollen from flowering plants and invertebrates from foliage or in flight. General honeyeater information indicates that insects may be taken by hawking or gleaning, with fruit also used by some species.

Recorded diet categories: Fruit, seeds, nectar, pollen and invertebrates

  • Retain flowering shrubs and eucalypts in occupied habitat.
  • Retain fruiting and seed-producing plants, including native understorey plants.
  • Avoid removing all flowering resources from a work corridor or isolated habitat patch.

Foraging habitat: Foraging locations and movement

The species forages in semiarid mallee woodlands, tall heath and associated low eucalypt woodlands. The available banding information indicates that Purple-gaped Honeyeaters appear to move only short distances, compared with some Mallee Bird species that have been recaptured more than 100 km away.

This suggests that clearing within or next to an occupied patch may remove local feeding resources that are not quickly replaced. The supplied documents do not provide a species-specific home-range size or routine foraging distance.

Movement pattern: Appears to move only short distances

Home-range size: Not provided

  • Survey flowering and fruiting vegetation across the entire proposed clearing area and adjacent retained patch.
  • Map narrow vegetated links between mallee patches where they provide access to feeding resources.
  • Do not assume that a small, isolated patch is unimportant because the species can occur in fragmented mallee.

Breeding habitat: Breeding biology

The species builds a supported nest in standing vegetation. The supplied documents provide estimates for clutch size, incubation, age at first reproduction and longevity, but do not give a defined breeding season or detailed nest-site measurements.

The Purple-gaped Honeyeater is recorded as a supported-nest breeder. Its nest base rests on standing vegetation. The documented breeding values are based on the Mallee Bird Community assessment and include modelled or published values as indicated in that source.

Breeding season: Not specified in the supplied documents; breeding is generally linked to resource availability in honeyeaters.

Typical clutch size: About 2 eggs

Incubation period: About 13.7 days

Age at first reproduction: About 1.7 years

Maximum longevity: About 14 years

Gestation: Not applicable

Breeding habitat: Breeding habitat and project controls

Breeding habitat requires standing vegetation capable of supporting a nest, together with nearby food resources. Mallee, tall heath and low eucalypt woodland with a developed shrub layer should be treated as potential breeding habitat where the species is present.

Before clearing, inspect suitable shrubs and low trees for supported cup nests. If an active or recently used nest is found, establish an exclusion area in accordance with the project approval and fauna handling procedure, and avoid disturbance until the nest is no longer active.

  • Search standing shrubs and low woodland vegetation before clearing.
  • Retain occupied nesting vegetation wherever practicable.
  • Schedule vegetation removal outside the locally confirmed breeding period when survey evidence identifies one.
  • Use a staged clearing method so fauna can move into retained habitat before vegetation is removed.

Sheltering habitat: Vegetation shelter

The supplied documents do not describe a specialised roost, hollow, burrow or den for the Purple-gaped Honeyeater. Shelter is expected to be provided by standing mallee, heath and low woodland vegetation.

The species is a small, short-distance-moving honeyeater associated with mallee-dependent habitat. Retained shrubs, mid-storey vegetation and low eucalypt foliage are likely to provide perches, cover and protection between feeding bouts.

The species is not identified as a hollow-nester or burrow-nester. Its documented nest location is supported vegetation.

Documented nest or shelter type: Nest supported by standing vegetation

Hollow or burrow use: Not reported in the supplied documents

Shelter dimensions: Not provided

  • Retain dense standing shrubs and mid-storey vegetation within occupied habitat.
  • Protect connected vegetation around known records rather than retaining only isolated trees.
  • Avoid leaving fauna exposed by clearing the understorey first and removing canopy later.

Sheltering habitat: Fire-age structure

Mallee vegetation develops different shelter and feeding structures as it recovers from fire. Purple-gaped Honeyeater occurrence or density was reported to peak in vegetation about 10 to 30 years after fire, while very recently burnt areas generally support fewer established mallee birds.

Fire planning should retain a range of post-fire age classes and avoid burning or clearing an entire occupied remnant at once.

  • Map recent fire history before clearing or prescribed burning.
  • Retain unburnt refuge vegetation beside recently burnt areas.
  • Avoid creating a single, uniform post-fire age class across a remnant.

Threats: Clearing and fragmentation

The main project risks are removal and fragmentation of mallee habitat, loss of flowering and nesting vegetation, and fire regimes that reduce the range of vegetation structures available to the species.

Clearing removes feeding, shelter and nesting vegetation. Fragmentation reduces reporting rates for Mallee Birds and is associated with lower abundance in less extensive mallee remnants. The Purple-gaped Honeyeater persists in fragmented mallee, but its reporting rate remained low.

Small clearing footprints can still matter because the species appears to move only short distances and may depend on local food resources within a patch.

Reporting rate in intact mallee Key Biodiversity Areas: 0.39 percent, 2010 to 2019

Reporting rate outside Key Biodiversity Areas: 0.31 percent, 2010 to 2019

  • Avoid clearing intact mallee, tall heath and low eucalypt woodland where the species has been recorded.
  • Retain continuous vegetation around records, not only individual trees.
  • Keep access tracks and construction compounds out of flowering shrubland and dense mallee understorey where practicable.
  • Use pre-clearing surveys and staged clearing in all suitable habitat.

Threats: Fire

Large fires can remove entire mallee remnants or make vegetation structure uniform across a broad area. Recently burnt areas generally have lower abundance of many mallee birds, while Purple-gaped Honeyeater density was reported to peak in vegetation about 10 to 30 years after fire.

Fire management that repeatedly favours young vegetation can reduce the mid-successional structure used by this species.

  • Avoid burning occupied mallee during project works unless it is authorised and supported by a species-aware fire plan.
  • Retain unburnt patches and multiple fire-age classes.
  • Consider drought and slow post-fire vegetation recovery when assessing fire impacts.

Threats: Roads and construction activity

The supplied documents do not quantify road mortality or disturbance thresholds for this species. Roads and construction can nevertheless remove habitat, divide short-distance movements and increase disturbance around nests and feeding sites.

Vehicle movement can also damage roadside mallee and heath that functions as a link between larger patches.

  • Keep temporary roads, laydown areas and spoil stockpiles out of retained mallee and heath.
  • Apply low-speed controls and fauna awareness training where occupied habitat is beside active roads.
  • Inspect vegetation before widening roads or clearing verges.

Threats: Predators, disease and hydrology

The supplied documents do not identify species-specific predator, disease or hydrology threats for the Purple-gaped Honeyeater. Project assessments should still consider introduced predators, domestic animals, altered drainage, waterlogging, erosion and changes to flowering vegetation where these occur.

Do not infer that a project has no impact from the absence of a documented disease or predator threat. The available evidence is limited for these topics.

  • Prevent domestic animals from entering retained habitat and construction areas.
  • Keep sediment, polluted runoff and altered drainage out of mallee and heath vegetation.
  • Inspect retained vegetation for dieback or other plant health issues after ground disturbance.
  • Record and report unusual mortality or sick birds through the project fauna procedure.

Survey methodology: 1. Habitat assessment and daytime searches

The Purple-gaped Honeyeater occurs in mallee woodlands, tall heath and associated low eucalypt woodlands. It is a mallee-dependent species that can be difficult to detect, so surveys should target suitable retained and proposed clearing habitat and use standardised searches that can be repeated and compared.

Map mallee woodlands and shrublands, tall heath, low eucalypt woodland, dense mid-storey vegetation and connected habitat before selecting survey points.

Inspect the site during daylight for honeyeater activity, flowering plants, foraging birds, nests and movement routes between retained habitat patches.

Give particular attention to vegetation that is 10 to 30 years post-fire, when Purple-gaped Honeyeater density is expected to peak in the mallee bird assemblage.

Record the vegetation type, fire age where known, flowering resources, habitat condition, nearby retained vegetation and the area proposed for clearing.

Reported habitat: Mallee woodlands, tall heath and associated low eucalypt woodlands

Published standardised search formats: 2 hectare, 20 minute searches and 500 metre area searches

Mallee assemblage fire response: Purple-gaped Honeyeater density peaks in taller and denser vegetation about 10 to 30 years after fire

  • Use standardised 2 hectare, 20 minute searches and 500 metre area searches where the project survey design permits comparison with existing Birdata data.
  • Record all observations, including birds seen or heard outside formal search periods, with coordinates, date, time, habitat, behaviour and observer effort.

Survey methodology: 2. Dawn and flowering-resource surveys

Survey during the main daily activity period for honeyeaters, with particular attention to flowering eucalypts and other nectar-producing plants.

Search the outer foliage and mid-storey for birds moving between perches, feeding on nectar or pollen, taking fruit or seeds, and capturing invertebrates.

Repeat searches across suitable habitat units and, where practicable, across different flowering conditions because honeyeater activity and local abundance can vary with food availability.

Recorded diet: Fruit, nectar and pollen, seeds and invertebrates

Detection consideration: The species appears to move only short distances, so connected local habitat and nearby retained vegetation should be searched carefully

  • Record the plant species being used, the number of birds, feeding behaviour, direction of movement and whether birds enter habitat proposed for clearing.
  • Treat an absence from one visit as inconclusive where suitable habitat and flowering resources remain present.

Survey methodology: 3. Targeted follow-up and survey limitations

Use follow-up searches when the initial assessment identifies suitable mallee habitat, recent records, flowering resources or a connected movement route within the work area.

Include both intact mallee and fragmented remnants in the assessment, because the species has been recorded at low and similar reporting rates in intact and fragmented mallee areas.

Do not treat a blank search result as proof that the species is absent, particularly where the remnant is small, habitat is structurally suitable or survey conditions are poor.

Reporting-rate example: 0.39 percent inside mallee Key Biodiversity Areas and 0.31 percent outside them for 2010 to 2019

NSW regional record in supplied material: Less than 1 percent of the sampled range in the Hawkesbury-Nepean region, with the most recent listed record from 1955

  • Record wind, rain, temperature, visibility, noise, flowering condition, fire history and the precise area and duration searched.
  • There is no species-specific survey guideline or minimum effort stated in the supplied documents, so set project effort with reference to the relevant state survey guidance, approval conditions and the size and quality of suitable habitat.
  • Use experienced observers familiar with mallee honeyeaters and document the basis for concluding that further survey is not required.

Survey methodology: Minimum effort and reporting

  • Complete the state or territory survey effort required for the approval pathway and increase effort where suitable mallee habitat is extensive, connected or difficult to search.
  • Submit confirmed records and negative survey results, where required, to the relevant state wildlife database and the project client’s environmental records system.
  • Provide coordinates, datum, date, time, observer, method, search area, duration, weather, habitat, fire age if known, bird count, behaviour, photographs and any call or other evidence.
  • Report any taxonomic uncertainty and retain photographs, sound recordings and field notes for verification.
  • Check the current NSW and Victorian conservation status before works because the species is listed as Vulnerable in both jurisdictions in the supplied advice.

Before habitat disturbance: Avoid and minimise habitat loss

Plan the work around the species’ use of mallee-dependent habitat. The main controls are to avoid clearing suitable vegetation, retain connected habitat and confirm the state approval requirements before machinery enters the site.

Avoid clearing intact mallee, tall heath and low eucalypt woodland wherever practicable.

Retain large, connected patches of mallee and link them to nearby retained vegetation rather than leaving isolated narrow remnants.

Retain flowering shrubs and trees, dense mid-storey vegetation, fallen timber, leaf litter and other ground and understorey structure used by mallee birds.

Keep clearing footprints, access tracks, laydown areas and stockpiles out of retained habitat and prevent indirect damage from dust, vehicle movement, weeds and altered drainage.

  • Use clearly surveyed no-go areas around retained habitat and movement routes.
  • Design the work so that the species can move between retained patches over short distances without crossing active machinery areas.

Before habitat disturbance: Confirm approvals and plan the works

Check the current EPBC Act status and whether the project affects any other nationally listed species, ecological community or protected matter before works begin.

Confirm state listing, wildlife handling requirements, clearing approvals and any survey or reporting conditions in NSW, Victoria or another jurisdiction where the project occurs.

Schedule clearing outside periods of high flowering activity where this can be done without extending the disturbance footprint or creating other environmental risks.

Stage clearing so that suitable retained habitat remains available while each work area is surveyed and released.

State status in supplied advice: Vulnerable in NSW and Victoria

National status in supplied material: Not listed under the EPBC Act

  • Prepare a fauna management plan that identifies habitat to retain, survey methods, spotter catcher responsibilities, machinery controls, stop-work triggers, release sites, incident contacts and reporting requirements.
  • Brief all workers on the species’ appearance, habitat, no-go areas and the requirement to stop and notify the fauna spotter catcher when fauna is detected.

Before habitat disturbance: Prepare the site

Complete a pre-clearance inspection of each work area shortly before clearing, including suitable mallee, tall heath, low eucalypt woodland and connected edge habitat.

Mark retained vegetation, flowering resources, nests, active bird locations, access limits and any habitat features that machinery must avoid.

Install exclusion fencing or bunting where it will prevent machinery, vehicles, spoil or workers entering retained habitat.

Confirm a nearby release area within retained suitable habitat before clearing starts, and obtain approval for its use where required.

  • Do not clear or trim vegetation outside the approved footprint to improve machinery access without reassessing habitat impacts.
  • Use a qualified fauna spotter catcher where required by the approval or state rules, and confirm that the person is authorised to handle birds.

During habitat disturbance: Daily clearing controls

Keep a fauna spotter catcher present for clearing where required by approval or the fauna management plan. The spotter catcher must be able to see the clearing face, communicate with machinery operators and stop work immediately when fauna or an unsafe habitat feature is found.

Inspect the work area each day before machinery starts and confirm that exclusion fencing, no-go markers and release sites remain suitable.

Clear in small stages towards retained habitat where this is safe and approved, giving birds an opportunity to move away from machinery.

Keep machinery within the approved footprint and use low-speed operation near retained vegetation and the active clearing face.

Stop work during poor visibility, unsafe wind or other conditions that prevent the spotter catcher from monitoring the clearing area effectively.

  • Keep a clear communication channel between the spotter catcher, supervisor and each machine operator.
  • Do not allow workers to chase, net or handle a bird unless they are authorised and directed to do so by the fauna spotter catcher.

During habitat disturbance: Fauna handling and stop-work response

Stop work if a Purple-gaped Honeyeater is found within the clearing footprint, becomes trapped, is injured or cannot safely leave the work area.

Allow an uninjured bird to move to nearby retained habitat where possible, while maintaining a quiet exclusion zone around it.

If capture is necessary, use only an authorised and suitably trained wildlife handler and minimise handling time, noise, heat and physical restraint.

Release an uninjured bird into nearby retained suitable habitat that is outside the active work area and away from machinery, people and domestic animals.

Take an injured bird to an appropriately qualified veterinarian or authorised wildlife carer as soon as practicable, following the relevant state requirements.

  • Do not relocate a bird long distances or release it into unsuitable open, recently cleared or heavily disturbed vegetation.
  • Record the reason for capture or relocation, the handling method, condition, release location, time, people involved and outcome.
  • Resume work only after the fauna spotter catcher confirms that the animal has left the risk area or the authorised handler has completed the response.

During habitat disturbance: Habitat feature protection and records

Protect flowering plants, dense mallee cover, mid-storey vegetation, leaf litter, fallen timber and connected retained vegetation from machinery and stockpiles.

Do not remove logs, rocks, hollows or other habitat features unless they are within the approved footprint and the fauna management plan permits their treatment.

Keep dust, sediment, weeds, fire and changed drainage from entering retained mallee or heath habitat.

Maintain a daily clearing register showing the area cleared, dates, machinery, spotter catcher, weather, fauna observations, incidents, stop-work events and habitat retained.

  • Photograph the pre-clearing and post-clearing condition of retained habitat and any fauna incident site.
  • Notify the project environmental officer and regulator when an approval condition, injured animal, unauthorised clearing event or repeated fauna interaction occurs.

After habitat disturbance: Post-clearance checks

Close out each work area only after fauna risks and habitat controls have been checked. Retained mallee and heath must remain protected during construction, maintenance and later access works.

Inspect the cleared footprint and its boundaries for trapped, injured or displaced birds before removing the spotter catcher controls.

Check that exclusion fencing, retained vegetation, flowering resources and connected habitat have not been damaged by machinery, waste, dust or unauthorised access.

Remove temporary controls only when the environmental officer confirms that no further clearing or high-risk activity is planned in that area.

  • Complete a final fauna and habitat inspection after each staged clearing area and record the result.
  • Escalate any injured animal, unapproved clearing, failed exclusion control or new habitat impact under the project incident process.

After habitat disturbance: Monitoring and reporting

Monitor retained habitat where the project may alter vegetation cover, fire age, flowering resources, drainage, weeds or connectivity.

Use the same search method, locations and reporting fields during follow-up monitoring where comparison with pre-clearing observations is required.

Report confirmed records, relocations, injuries, mortalities, stop-work events, habitat loss and rehabilitation progress to the approval holder and relevant regulator.

  • Submit required fauna records to the relevant state wildlife database.
  • Keep survey data, photographs, maps, approvals, spotter catcher logs and incident reports for the period specified by the approval or management plan.

After habitat disturbance: Offsets and residual impacts

Assess residual loss of suitable mallee habitat after avoidance, minimisation and rehabilitation measures have been applied.

Apply any state or local offset, biodiversity credit or approval requirement that is triggered by the project.

Do not use an offset as a substitute for retaining suitable connected habitat within or next to the work area where avoidance is practicable.

  • Document the area, condition and connectivity of habitat lost and retained so that any offset calculation can be checked.
  • Confirm that any offset or conservation action protects suitable mallee-dependent habitat for the required duration.

Rehabilitation actions: Re-establish suitable vegetation

Rehabilitation should rebuild the structure and food resources of mallee-dependent habitat. It should be planned over several years because vegetation structure and some old-growth features develop slowly after disturbance and fire.

Use locally appropriate mallee, low eucalypt and heath species that match the pre-clearing vegetation community and local soil and rainfall conditions.

Re-establish a connected mix of canopy, mid-storey and understorey vegetation rather than a single dense planting layer.

Include flowering plants that provide nectar and pollen, while retaining plant diversity that supports fruit, seeds and invertebrates.

Control weeds and prevent new access tracks, grazing, dust deposition and edge disturbance from degrading the rehabilitated area.

  • Use local provenance seed or tubestock where required by the rehabilitation specification.
  • Protect plantings from browsing and maintain them until survival and cover meet the approved success measures.

Rehabilitation actions: Retain habitat structure and manage fire

Retain or reinstate suitable fallen timber, leaf litter and other ground structure where this can be done safely and without introducing weeds or pathogens.

Do not burn rehabilitated mallee solely to meet a fixed area target or create uniform fire age across the site.

Plan fire management to retain a mixture of post-fire age classes, including mid-aged and long-unburnt mallee that provides taller vegetation, older canopy structure and developing hollows.

Use fire history and vegetation response to guide future management, because mallee attributes change over decades after fire.

Relevant fire response: Purple-gaped Honeyeater density peaks in taller and denser vegetation about 10 to 30 years after fire

Hollow development in mallee: Hollows begin to develop after about 35 years and become large after about 80 years

  • Prevent a single fire from removing all retained and rehabilitated habitat in a remnant where practical.
  • Record fire dates, extent, severity and subsequent vegetation recovery as part of the rehabilitation monitoring program.

Rehabilitation actions: Monitor success and adapt management

Monitor plant survival, canopy and mid-storey cover, flowering resources, weed cover, fire age, connectivity and use by Purple-gaped Honeyeaters.

Repeat standardised 2 hectare, 20 minute searches or 500 metre area searches where the project requires comparison with the baseline.

Compare results with the pre-clearing condition and investigate continuing absence where habitat structure, flowering resources or connectivity have not been restored.

Use monitoring results to replace failed plants, control weeds, repair fencing, adjust access and revise fire management.

  • Set success measures for vegetation establishment, retained habitat condition, weed control, connectivity and fauna use before rehabilitation begins.
  • Continue monitoring for the period required by the approval, rehabilitation plan or offset agreement.
  • Submit rehabilitation fauna records to the relevant state wildlife database and retain the monitoring data with the project close-out records.

Sources