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Singing Bushlark (Mirafra javanica)

The Singing Bushlark is a small, ground-dwelling lark of open grasslands, shrublands, heathlands, dunes, mudflats, crops and pasture across much of Australia. It is listed in the project information as Vulnerable under the EPBC Act and in the Northern Territory, so ground nests, breeding territories and dense grass cover need protection during clearing and construction.

Conservation status

Commonwealth, EPBC Act 1999: Vulnerable.

Northern Territory, Territory Parks and Wildlife Conservation Act 1976: Vulnerable.

Breeding season

The calendar below represents a typical Australian pattern based on the supplied records. Timing can vary with rainfall, particularly in arid areas, and south-eastern birds are more likely to be present during the warmer months.

Month values are January to December, with 0 meaning not typical, 1 meaning occurs and 2 meaning peak. Rainfall can shift breeding timing in arid regions.

  • Breeding: Breeding is reported from September to January. Significant rainfall can trigger breeding in arid areas.
  • Young in nest and dependent: Nestlings may remain for 12 to 14 days or longer, and young may remain dependent for almost a month after fledging. The January to February marking reflects the likely continuation of dependency from late breeding attempts.
  • Seasonal movement and presence: The species is described as a summer migrant to south-eastern continental Australia. It is a vagrant to Tasmania. Movement elsewhere is not quantified.
  • Rain-linked activity in arid areas: Breeding in arid areas follows significant rainfall, so activity and site use may increase outside a fixed seasonal window after rain.
  • Highest clearing risk: September to January is the documented breeding period, with risk extending into February where late nests produce dependent young. Ground disturbance can destroy concealed nests or affect young before they can fly.

Identification

The Singing Bushlark is a compact, brown ground bird with a short bill, short rounded wings and a small crest that is usually inconspicuous. It is most often detected on the ground, where it runs rather than bobbing.

Adults have brown, reddish or sandy upperparts with darker feather-centre streaks, a mottled or streaked breast, a buff eyebrow and pale underparts. The wings show a distinctive rufous panel, although this can bleach to a buff colour. The tail is brown and white-sided.

When flushed, it may make a slurred chirrup and fly in short, jerky swoops. It may hover or flutter briefly before landing or dropping into cover, with the head raised and tail depressed.

Length: 12 to 15 cm

Weight: 18 to 25 g

Wing: 61 to 81 mm

Tail: 40 to 56 mm

Bill: 12 to 16 mm

Identification: Similar species

The species can be confused with an Australian Pipit or a half-grown Eurasian Skylark. The Singing Bushlark is more thickset than an Australian Pipit, with a shorter, stouter bill and shorter-looking legs.

An Australian Pipit has a more upright stance, a slimmer build and bill, and usually bobs its tail while standing. It runs or struts purposefully and drops into cover in flight without the bushlark's brief hovering behaviour.

The bushlark lacks the white trailing wing edge of the Eurasian Skylark. Its wings appear short and broad in flight, with a rufous panel.

Identification: Field signs and sex

The main field signs are the bird's slurred chirrup, sustained song and occasional mimicry of other species. During breeding it may sing from the ground, a low perch or during a high song-flight over its territory.

The nest is a loose, cup-shaped structure made from grasses. It is placed in a shallow hollow or scrape beside a grass tuft, straw or a clod of earth, and may have dry grass forming a hood or partial concealment. Eggs are earthy brown and heavily freckled according to the historical description.

No reliable sex differences, tracks, scats, sloughs or eyeshine characteristics are provided in the supplied documents. Juveniles have more finely scaled-looking upperparts because of narrow pale feather fringes.

Distribution: Australian range

In Australia, the Singing Bushlark has a broad but patchy range across open country from southern Australia through the eastern mainland and into northern Australia. The supplied documents do not provide bioregion-level boundaries, population estimates or trend data.

The documented range extends from the Eyre Peninsula in South Australia through Victoria, New South Wales, Queensland and the Northern Territory, and through Western Australia to Shark Bay.

The species is described as a summer migrant to south-eastern continental Australia and a vagrant to Tasmania. It also occurs outside Australia across much of South-East Asia and nearby islands.

Australian states and territories recorded: Western Australia, South Australia, Victoria, New South Wales, Queensland and the Northern Territory

Southern limit: Eyre Peninsula, South Australia

Western limit: Shark Bay, Western Australia

Tasmania: Vagrant rather than a regular documented population

Bioregions: Not specified in the supplied documents

Distribution: Strongholds and population information

The supplied documents do not identify Australian strongholds, discrete subpopulations or important population concentrations. They also do not provide a national population estimate, density, population trend or site occupancy measure.

For project assessment, records should therefore be interpreted against the local availability of open grassland, chenopod shrubland, heathland, dunes, mudflats and suitable pasture or crop habitat.

Global extent of occurrence: Estimated at approximately 10,000,000 km²

Australian population size: Not stated

Population trend: Not stated

Known Australian subpopulations: Not stated

Habitat: Habitat types

Singing Bushlarks use open, sparsely treed habitats with ground vegetation suitable for running, feeding and nesting. They are uncommon in heavily treed habitats and can also use modified open country.

Recorded habitats include chenopod shrublands, native and exotic grasslands, coastal heathlands, dunes, mudflats, salt marshes and other open shrublands. The species also uses crop and pastureland, cereal crops, sparse sugar cane fields, playing fields, golf courses and road verges.

It is rarely found in treed habitats. On development sites, apparently simple grassed areas can still provide feeding habitat or breeding territory if they have suitable ground cover and open structure.

Habitat: Structure and climate

The species uses both temperate and tropical open country. In arid areas, breeding is associated with significant rainfall, indicating that recent rainfall can increase the value of otherwise dry grassland.

The supplied documents do not give a preferred elevation, minimum grass height, vegetation density, canopy cover, soil type or distance from trees. They describe nests in natural depressions, beside grass tufts, straw or clods of earth.

Climate zones recorded: Temperate and tropical areas, including arid country

Elevation limit: Not stated

Preferred broad structure: Open, ground-accessible vegetation with grass, sparse shrubs or bare ground

Tree association: Rarely occurs in treed habitats

Foraging habitat: Diet

The Singing Bushlark is a terrestrial, mainly solitary forager that takes food from the ground surface and just below it. It may form small parties outside periods of territorial activity.

Food consists mainly of grass seeds and invertebrates. Insects are particularly important during the breeding season.

The short, stout bill is suited to handling and crushing seeds. The supplied documents do not identify particular grass species, insect taxa or seasonal foraging distances.

Main plant food: Grass seeds

Main animal food: Invertebrates, especially insects during breeding

Foraging group: Usually alone, sometimes in small parties

Foraging habitat: Foraging method and site features

The bird gleans and probes on or just below the ground surface. Open grassland, pasture, crop margins, heath, dunes, mudflats and sparsely vegetated shrubland can provide foraging substrate.

The supplied documents do not state a foraging home range, territory size, feeding density or maximum distance travelled from a nest.

Foraging level: Ground surface and shallow subsurface

Foraging range: Not stated

Known feeding habitat: Grasslands, crops, pasture, heathlands, dunes, mudflats and open shrublands

Breeding habitat: Breeding biology

Breeding occurs on the ground in open grassland and similar habitats. Territories are defended during breeding, and both adults care for the young.

In Australia, breeding is reported from September to January and may follow significant rainfall in arid areas. Both parents incubate the eggs, feed nestlings and fledglings, and remove faecal sacs.

The nest is built in a shallow natural depression or hollow scrape beside a grass tuft, straw or a clod of earth. It is made from dry grasses and may have a hood or ragged grass structure that helps conceal it.

Young normally remain in the nest for 12 to 14 days or longer, but may leave at 7 to 8 days if disturbed, before they can fly. After fledging, they remain dependent on their parents for almost a month.

Breeding season: September to January in Australia; arid breeding may follow significant rainfall

Clutch size: Two to four eggs; three is described as usual in the historical account

Incubation: Both parents incubate; incubation duration is not stated

Nest period: Usually 12 to 14 days or longer; disturbed young may leave at 7 to 8 days

Age at maturity: Not stated

Lifespan: Not stated

Parental dependence: Almost one month after fledging

Breeding habitat: Breeding habitat features

Suitable breeding areas have open grassland or comparable low vegetation, ground depressions or scrapes, and enough dry grass to construct and conceal a cup-shaped nest. Nests may be beside grass tufts, straw or clods of earth.

Ground-disturbing works can destroy nests directly or expose them to predators. Breeding territories may also be affected when open habitat is cleared or divided during the breeding season.

  • Inspect open grassland, pasture, crop margins, heath and sparsely vegetated areas for ground nests before clearing.
  • Treat shallow scrapes, grass clumps and concealed ground edges as potential nest locations during September to January, especially after significant rainfall in arid areas.
  • Avoid driving, grading, slashing or stockpiling materials across suitable open ground until the area has been checked and any required exclusion controls are in place.

Sheltering habitat: Nest and ground cover

The species relies on concealment in ground vegetation and low cover rather than tree hollows or elevated roosts. Its nest is a shallow ground structure that can be difficult to detect during clearing.

The nest is a loose, deep, cup-shaped structure made from grasses and placed in a natural depression or hollow scrape. It may be beside a grass tuft, straw or a clod of earth, with the rear or upper edge left ragged to assist concealment.

A hood of dry grass may be built over the nest. The historical description gives a nest diameter of about 28 inches and a depth of about 1 inch, although this measurement is historical and may not represent all nests.

Nest position: On the ground, in a shallow depression or hollow scrape

Nest material: Dry grasses

Historical nest dimensions: Approximately 28 inches in diameter and 1 inch deep

Concealment: Beside grass, straw or a clod, sometimes with a hood of dry grass

Sheltering habitat: Other refuges

Outside the nest, birds may drop into grass or other low cover when flushed. The supplied documents do not report use of burrows, tree hollows, caves, communal roosts or defined refuge structures.

No species-specific information is provided on night roosts, refuge distances, minimum cover dimensions or survival during fire and flooding.

Threats: Documented threat

The clearest documented threat is predation of nests and young by introduced mammals. Clearing and ground disturbance are important project risks because the species nests and feeds at ground level in open habitats.

Nesting success can be low, with most nest losses attributed to introduced mammalian predators. Predators may be especially damaging where ground nests are exposed by sparse cover or disturbance.

  • Control or exclude introduced mammalian predators where this is part of an approved project management plan.
  • Keep domestic dogs and other predators away from known breeding areas and ground nests.

Threats: Clearing and construction risks

Vegetation removal, grading, vehicle movement, trenching and stockpiling can destroy nests, kill flightless young or remove feeding and concealment cover. These risks are greatest in open grassland, pasture, crop margins, heath, dunes, mudflats and sparsely vegetated shrubland during the breeding and dependent-young period.

Fragmentation can reduce the amount of continuous open habitat and increase edge exposure, although the supplied documents do not quantify a fragmentation threshold or road-effect distance.

The supplied documents do not provide species-specific evidence for disease, hydrology change or fire as threats. Fire planning should still account for the loss of grass cover and ground nests where works occur in suitable habitat, using site-specific ecological advice.

  • Schedule ground disturbance outside the September to January breeding period where practicable.
  • Complete pre-clearance searches of open habitat, with particular attention to grass clumps, shallow scrapes and concealed ground edges.
  • Use clearly marked exclusion zones around active nests and dependent young, and prevent vehicle access to those areas.
  • Retain suitable grass cover and avoid unnecessary removal of open ground vegetation around construction footprints and access routes.

Survey methodology: 1. Habitat and timed searches

The Singing Bushlark is a ground-foraging grassland bird that can be difficult to detect when it is not calling. Survey should focus on open ground, grass cover, breeding activity and birds flushed from cover. The supplied documents do not provide a project survey guideline with prescribed nights, hours, transect lengths or trap effort, so the ecologist must set effort to match the impact area, habitat quality, season and approval conditions.

Map and inspect native and exotic grasslands, chenopod shrublands, coastal heath, dunes, mudflats, crop land, pasture and other open modified areas before selecting search routes.

Walk all suitable habitat on foot and record birds seen on the ground, running birds, flushed birds, feeding signs, territorial behaviour and any nests or dependent young.

Give particular attention to sparse ground cover, grass tussocks, natural depressions and hollows or scrapes beside grass clumps, because the species nests on or near the ground.

Conduct searches during the local breeding period, September to January, and after significant rainfall in arid areas when breeding activity is more likely.

Breeding period reported in the supplied material: September to January

Typical clutch size: 2 to 4 eggs

  • Set the search area, route length, repeat visits and weather requirements before fieldwork, and document the basis for that decision.
  • Avoid relying on a single visit because the species may remain concealed in grass or be present without calling.

Survey methodology: 2. Acoustic and flight detection

Undertake quiet listening periods during suitable daylight periods and, where justified by the impact, after dark, because Singing Bushlarks may sing at any time of day or night during the breeding period.

Record the direction, duration and location of songs, including song-flight observations over a territory.

Treat a slurred chirrup on flushing, jerky wing beats, a slightly raised head and a depressed tail as useful detection and identification features.

Confirm records where possible using the short, broad-looking wings and rufous wing panel, while allowing for bleaching of that panel to a buff colour.

Reported adult weight: 18 to 25 grams

Reported wing length: 61 to 81 millimetres

Reported body length from the field account: 12 to 15 centimetres

  • Do not identify the species from a call alone where Australian Pipit or Eurasian Skylark occurs nearby.
  • Record whether the bird was on the ground, in low flight, hovering over the site or using a low perch.

Survey methodology: 3. Nest and breeding checks

Search ground depressions, scrapes beside grass tussocks, the base of grass clumps and areas behind clods of earth in suitable breeding habitat.

Keep the observer and equipment outside the immediate nest area where a nest, eggs or young are suspected, and use binoculars to reduce trampling and disturbance.

Record adults carrying food, alarm behaviour, faecal sac removal, fledglings and adults repeatedly visiting one location.

Treat a nest as active unless a suitably qualified ecologist confirms otherwise, because young may leave at 7 to 8 days if disturbed and may remain dependent on their parents for almost one month after fledging.

Usual reported time in the nest: About 10 days

Reported nestling period: Up to 12 to 14 days or longer

Reported post-fledging dependence: Almost one month

  • Do not enter dense nesting cover or handle eggs, nestlings or fledglings unless authorised under the relevant permit and fauna management plan.
  • Record the nest location, habitat condition, photographs from a safe distance and the extent of the proposed disturbance.

Survey methodology: Minimum effort and reporting

Use an ecologist to document the survey design, dates, start and finish times, weather, rainfall context, observers, route or area searched, detection method and limitations.

Increase repeat coverage where habitat is extensive, fragmented, recently rain-affected, difficult to access or affected by poor visibility, wind or heavy rain.

Report all confirmed and probable records, nests, breeding behaviour and fauna incidents to the relevant state wildlife database and to the project approval authority where required.

Retain spatial data in a format that can be supplied to the project environmental officer, regulator and land manager.

  • Check the current EPBC Act and state approval requirements before fieldwork and construction.
  • State clearly when no prescribed survey effort was available in the source material and explain the project-specific effort selected by the ecologist.

Before habitat disturbance: Avoid and minimise

Plan works around the species' use of open ground and its reported September to January breeding period. The main pre-clearance risks are loss of grassland, destruction of ground nests and disturbance of adults or dependent young.

Retain native and exotic grassland, chenopod shrubland, coastal heath, dunes, mudflats, pasture and crop areas where the species has been recorded or where suitable habitat remains.

Keep connected areas of open habitat between retained patches and avoid creating isolated strips or narrow remnants beside the works.

Avoid unnecessary removal of grass tussocks, low cover, natural depressions and undisturbed ground.

Use the smallest practical work area, access route, laydown area and stockpile footprint.

  • Locate temporary facilities and vehicle routes in already disturbed areas that do not contain suitable open habitat.
  • Avoid clearing during September to January where practicable, particularly after significant rainfall in arid areas.
  • If breeding-season work cannot be avoided, require a targeted pre-clearance check and an ecologist-approved fauna management plan.

Before habitat disturbance: Approvals and work planning

The project environmental officer must confirm whether the recorded species and proposed action require referral or approval under the EPBC Act and whether state wildlife permits or threatened species approvals apply.

Include the species, mapped habitat, survey results, avoidance measures, clearing limits, stop-work triggers, fauna handling arrangements and reporting requirements in the fauna management plan.

Stage clearing so that retained habitat remains available while works progress and so that animals are not driven into machinery paths or isolated by partial clearing.

Brief all operators, supervisors and fauna spotter catchers on the species' ground-foraging behaviour, likely nest locations and identification features.

  • Set out no-go areas, nest exclusion areas, access routes and retained habitat on plans and on the ground before machinery arrives.
  • Nominate the authorised person who can approve fauna handling, relocation, nest buffers and restart of work.
  • Confirm the receiving wildlife carer or veterinarian arrangements before clearing begins.

Before habitat disturbance: Pre-clearance preparation

Complete a targeted pre-clearance survey immediately before disturbance, with timing and repeat checks set by the project ecologist according to the habitat and season.

Mark all detected birds, nests, breeding territories, active feeding areas and habitat to be retained without exposing the locations to unnecessary disturbance.

Use exclusion fencing only where it can protect a defined habitat area without trapping birds or blocking access to retained feeding habitat.

Remove no ground cover or install no machinery access through a marked area until the fauna spotter catcher and authorised ecologist release it.

  • Check depressions beside grass clumps, grass tussocks, bare ground margins and other potential nest sites before vehicles or graders enter.
  • Inspect areas again after rain where breeding activity may have started since the original survey.
  • Do not use domestic pets, unapproved deterrents or uncontrolled fire to move birds from the work area.

During habitat disturbance: Daily controls and machinery coordination

The Singing Bushlark is a small, terrestrial bird that usually forages on the ground and may fly only low and briefly when disturbed. Clearing must therefore proceed slowly, with the fauna spotter catcher able to see ground cover and direct machinery in real time.

The fauna spotter catcher must inspect the active work area before machinery starts each day and after breaks, weather changes or a change in the clearing footprint.

Use low vehicle speeds and a clearly defined clearing edge so the spotter catcher can scan the ground, grass tussocks and low flight path ahead of machinery.

Maintain direct communication between the spotter catcher, machine operator and site supervisor, and stop machinery immediately when the spotter catcher gives the stop signal.

Clear progressively towards retained habitat where the approved fauna plan identifies a safe direction, while avoiding funneling birds into roads, stockpiles or active machinery.

  • Keep machinery outside marked nest, breeding and no-go areas.
  • Do not reverse or swing machinery into an area that has not been checked since the last movement of the clearing edge.
  • Stop work if visibility is poor, the spotter catcher cannot safely stand clear of machinery, or an animal is detected in the exclusion zone.

During habitat disturbance: If a Singing Bushlark is found

Stop the relevant machinery and allow the bird to move away without chasing, cornering or repeatedly flushing it.

The fauna spotter catcher must determine whether the bird is an adult, fledgling, injured bird or bird associated with a nest, and must notify the site supervisor.

Do not catch or relocate a healthy free-flying bird unless this is authorised by the fauna management plan, permit and suitably qualified person.

If relocation is approved, move the bird only to nearby retained habitat that provides open ground and suitable grass cover, and record the release location.

  • Do not handle eggs, nestlings or fledglings unless the authorised person confirms that handling is permitted and necessary.
  • Treat a fledgling on the ground as potentially dependent, and search nearby cover for adults before considering intervention.
  • Place an injured bird in a secure, quiet, ventilated container and transfer it promptly to the nominated veterinarian or wildlife carer through the authorised person.
  • Do not give food or water to an injured bird unless directed by the receiving veterinarian or wildlife carer.

During habitat disturbance: Habitat features and stop-work triggers

Protect grass tussocks, low ground cover, natural depressions, scrapes and open feeding areas because the supplied material identifies these as relevant to nesting and foraging.

Treat an active nest, eggs, young, repeated adult nest visits, an injured bird or a bird unable to leave the work area as a stop-work trigger within the affected zone.

Have the ecologist set the exclusion distance and restart conditions for each nest or breeding observation because the supplied documents do not specify a standard buffer.

Stop work if clearing reveals a previously unrecorded area of suitable habitat with repeated Singing Bushlark activity or if the approved clearing footprint is exceeded.

  • The fauna spotter catcher must record the trigger, location, action taken, person authorising the action and time work resumed.
  • Do not disturb hollows, logs, rocks, burrows or wetlands unless they occur within the approved footprint and have been checked under the fauna plan.
  • Where such features are retained, fence them from machinery and prevent soil, spoil or sediment from covering them.

After habitat disturbance: Post-clearance checks

Post-clearance work must confirm that no bird, nest or dependent young has been left within the disturbed area and that retained open habitat remains usable. Records should support approval reporting and future management.

Inspect the full cleared footprint, retained edges, stockpile areas and access routes for injured birds, fledglings, nests, carcasses and signs of animals trapped by fencing or site infrastructure.

Complete a final ground check after machinery leaves and before the area is handed over to the next construction activity.

Where a bird was relocated or an active nest was protected, complete follow-up checks at the frequency set by the fauna management plan and approval conditions.

  • Remove or modify temporary exclusion fencing when it is no longer needed, unless it protects retained habitat and cannot trap birds.
  • Keep machinery and materials out of retained grassland and open feeding areas after clearing.
  • Escalate any dead or injured animal, failed nest or unapproved clearing incident to the project environmental officer.

After habitat disturbance: Monitoring and reporting

Monitor retained and rehabilitated open habitat for Singing Bushlarks using repeat observations and listening surveys designed by the project ecologist.

Compare detections, breeding behaviour, habitat condition and disturbance with the pre-clearing record rather than relying only on presence or absence.

Report survey dates, effort, weather, rainfall context, observers, locations, birds detected, breeding evidence, handling, relocation, injuries, deaths and corrective actions.

Submit confirmed records and significant incidents to the relevant state wildlife database and to the approval authority where required.

  • Maintain the fauna management plan, induction records, daily checklists, photographs, spatial files and incident forms for the project record.
  • Review controls after each incident and before work moves into another habitat patch.
  • Apply any approval conditions for offsets, compensatory habitat or additional monitoring.

Rehabilitation actions: Restore open habitat

Rehabilitation should recreate open, ground-foraging habitat rather than dense tree cover. The species uses grasslands, chenopod shrublands, coastal heath, dunes, mudflats, crop land, pasture and other open habitats, and rarely uses treed habitat.

Reinstate native grassland and other locally appropriate open vegetation using species sourced and selected by a restoration ecologist for the local soil, rainfall and regional plant community.

Retain or recreate a mosaic of grass tussocks and open ground so birds can run, forage and detect predators.

Restore natural depressions and shallow ground structure where they formed part of the pre-works habitat, without creating erosion or waterlogging that is not characteristic of the site.

Prevent rehabilitation from becoming dominated by dense woody vegetation where the approved rehabilitation objective is open Singing Bushlark habitat.

  • Do not plant trees or dense shrubs across retained or rehabilitated open habitat unless required for another approved ecological objective.
  • Control weeds that replace grass cover or obstruct ground foraging, using methods that do not injure birds or remove all protective cover at once.
  • Use local fire planning and grazing controls, where relevant, to maintain suitable grass structure and prevent a single dense or bare condition from persisting.

Rehabilitation actions: Protect habitat and reduce threats

Control introduced mammalian predators and other project-related threats where required by the fauna management plan, because the supplied material identifies introduced mammalian predators as a major source of nest loss.

Prevent vehicle access, uncontrolled stock access, soil compaction, rubbish accumulation and repeated disturbance in rehabilitated areas.

Maintain connected open habitat between retained patches and rehabilitation areas.

Do not install nest boxes, relocate logs or place rocks as a substitute for the species' primary ground habitat unless another species or approval condition requires those features.

  • Keep rehabilitated nesting areas free of machinery during the reported September to January breeding period where practicable.
  • Use signs, fencing or other controls to protect new grass cover until it is established and can withstand the approved land use.
  • Inspect for predator activity, weed invasion, erosion, excessive bare ground and loss of grass cover.

Rehabilitation actions: Success monitoring

Set rehabilitation success measures for open ground cover, grass establishment, weed control, predator management, connectivity and Singing Bushlark use before works begin.

Monitor rehabilitated areas during and after the September to January breeding period, including after significant rainfall in arid areas when breeding may occur.

Use repeat ground observations and acoustic checks, and record feeding, territorial behaviour, song-flight, nests and fledglings where detected.

Continue management until the project ecologist and approval authority agree that the habitat is stable and the required performance measures have been met.

Breeding response noted in the supplied material: Breeding may follow significant rainfall in arid areas

  • Map monitoring points and use the same points or comparable routes on each visit.
  • Record failed plant establishment, excessive woody regrowth, predator evidence, fire impacts and corrective actions.
  • Submit monitoring results and any confirmed records to the relevant state wildlife database where required.

Sources