Buff-sided Robin (Poecilodryas cerviniventris)

Conservation status

Northern Territory, Territory Parks and Wildlife Conservation Act 1976: Near threatened.

Breeding season

The Buff-sided Robin is generally resident across its range. The main breeding period is October to March, but nesting can occur in the dry season, so seasonal timing should not replace pre-clearing checks.

Months are January to December. A value of 0 means not typical, 1 means occurs or may occur, and 2 means peak or highest risk.

• Breeding: Breeding is mostly reported from October to March, with the strongest emphasis on the warmer wet-season period.
• Young: Two eggs are usually laid. The supplied information does not give incubation or fledging periods, so dependent young may occur through the main breeding season and should be checked for during all wet-season clearing.
• Movement or dispersal: Adults are generally resident. Banding records show average movement of about 1 km and a maximum recorded movement of 3 km; no regular migration is described.
• Highest clearing risk: Risk is highest from October to March because nesting and dependent young are most likely then. Dry-season nesting has also been recorded, so pre-clearing nest searches remain necessary outside this period.

Identification

The Buff-sided Robin is a medium to large Australasian robin with a dark upper body, a strong white eyebrow and a distinct buff to orange flank patch. It is usually detected by a brief visual observation from a low perch or by its clear, sweet whistles in dense vegetation.

Adults have a dark head, neck and back, a broad white stripe above the eye, black around the eye, white cheeks and a white throat.

The upper back is dark olive-brown to black, the chest has a grey wash, and the sides are deep fawn or buff, becoming almost white on the belly.

The wings are dark brown to black with white on some feather tips, and the tail also has white markings. The bill is black, the eyes are dark brown, and the legs and feet are grey to blackish-brown.

Identification: Size and sex

Males and females have similar plumage, so sex is not reliably determined by colour in the field.

Males are generally heavier and have longer heads, bills and wings than females.

Length: 16 to 18 cm

Male weight: 20 to 25.5 g

Female weight: 15.5 to 20.3 g

Identification: Similar species and field signs

The main identification issue is separation from the White-browed Robin, Poecilodryas superciliosa.

The Buff-sided Robin is larger, has a thicker white eyebrow, a darker upper back, a broad black face band, a greyer chest and more white on the wings and tail.

Juveniles have rusty brown upperparts with faint cream streaks, pale buff-ended white feather tips and a less distinct eyebrow. First immature birds retain dark buff on the throat, forehead and crown, with a mixed grey and rusty-brown chest.

Calls are clear and sweet. They include repeated sequences of two or three short, loud whistles, commonly with a higher final note, and series of three to five loud notes with changing pitch. Chatter calls occur during interactions with other robins or young birds.

The nest is a shallow, loosely built cup or nest structure made from twigs, bark, vines and grass, held together with cobwebs and lined with grass, roots or feathers. It is usually in a horizontal or vertical fork 1 to 3 m above the ground, commonly near water.

• Check the broad white eyebrow, dark face band, buff flanks and white wing and tail markings together rather than relying on one feature.
• Listen during early morning and late afternoon, when the species is most vocal.
• Inspect low forks in dense vegetation near water before clearing, while avoiding unnecessary disturbance.

Distribution: National range

The Buff-sided Robin is endemic to northern Australia. Its range follows suitable dense riverine and monsoon forest habitat from the Kimberley through the Top End to the north-western Gulf of Carpentaria.

In Western Australia, it occurs in the Kimberley region, including areas such as Geikie Gorge National Park and Prince Regent National Park.

In the Northern Territory, it occurs through the Top End, including Keep River National Park, Judbarra/Gregory National Park and Kakadu National Park.

In Queensland, it occurs in the north-western Gulf of Carpentaria, including the Nicholson River catchment and Boodjamulla, formerly Lawn Hill, National Park.

States and territories: Western Australia, Northern Territory and Queensland

Broad range: Kimberley to the Gulf of Carpentaria and Nicholson River catchment

Regional bioregions described in the supplied information: Kimberley, Top End and Northern Territory Gulf, including the Gulf Fall and Uplands region

Distribution: Strongholds and local populations

The species is associated with major rivers, tributaries and monsoon vine forests rather than with dry, open forest.

At the McArthur River Mine lease, birds were resident in the McArthur River riparian corridor and restricted locally to that corridor. The local population remained stable during monitoring from 2006 to 2016.

The supplied information does not provide a national population estimate. At the McArthur River site, 10.7 ha of riparian habitat was estimated to support two pairs, representing 2.7% of the habitat available within the lease.

National population: Not known from the supplied information

Local monitoring trend: Stable at the McArthur River Mine lease during 2006 to 2016

McArthur River project habitat loss: 10.7 ha, estimated to affect two pairs and equal to 2.7% of available lease habitat

Habitat: Habitat types

The species depends on dense, wet vegetation, especially tall riparian forest along rivers and tributaries. It generally avoids nearby drier, more open forest.

Recorded habitat includes dense forests near rivers, subcoastal and sandstone monsoon vine thickets, freshwater mangrove communities and dense vegetation around major rivers and tributaries.

Suitable riparian vegetation may include freshwater mangroves, pandanus and bamboo, with tall trees such as Melaleuca leucadendra and Nauclea orientalis.

At the McArthur River lease, associated vegetation mapping units included 8a, 8b and 9a. The described riparian forest also included vegetation mapped as 7a and 7b.

Habitat: Structure and site conditions

Preferred sites have a tall canopy, a sub-canopy and dense understorey close to water.

Important trees and shrubs recorded at the McArthur River site included Ficus racemosa, Terminalia platyphylla, Pandanus aquaticus and Barringtonia acutangula, as well as Melaleuca leucadendra and Nauclea orientalis.

The species is strongly associated with dense riparian vegetation and rarely enters adjacent drier, open forest.

No elevation limit is given in the supplied information. The documented climate range is the tropical north, including the monsoonal Kimberley, Top End and Gulf regions.

• Retain continuous strips of tall riparian vegetation wherever practicable.
• Map dense river, tributary and monsoon vine-thicket vegetation before setting clearing limits.
• Treat small isolated patches as potential habitat, because birds have been recorded in remnant forest patches separated from rivers or other suitable habitat.

Foraging habitat: Diet and hunting method

The Buff-sided Robin is a diurnal, mainly ground-foraging insectivore. It usually hunts from a low perch into nearby hard surfaces, with most foraging activity close to the ground.

Recorded prey includes beetles, ants, moth and butterfly larvae, spiders and other small invertebrates.

The species watches from a perch and makes a short flight to the ground or another hard surface to seize prey. It also takes flying insects in the air and picks prey from tree trunks, branches and leaves.

One study found that 95% of successful hunts were sally strikes onto a surface and about 5% were hawking attacks on flying insects.

Main feeding height: Usually within 3 m of the ground

Successful sally strikes: 95% in the cited study

Successful hawking attacks: About 5% in the cited study

Foraging habitat: Foraging habitat

Foraging habitat is dense riparian forest with low perches, shaded ground and a developed layer of trunks, branches, leaves and ground surfaces where invertebrates can be captured.

The supplied information does not identify particular food plants. Vegetation structure, leaf litter, tree trunks and invertebrate availability are more clearly supported as foraging requirements than any single plant species.

Adults usually remain near their established area. Banding records indicate average movement of about 1 km and a longest recorded movement of 3 km.

• Retain low perches and dense understorey beside clearing areas.
• Avoid clearing or storing materials across the ground layer beneath retained riparian trees.
• Control activities that remove the shaded, moist structure used for close-to-ground insect foraging.

Breeding habitat: Breeding biology

Breeding occurs across the species' range, mainly during the warmer wet season. Nests are placed low in dense vegetation near water, so clearing in riparian corridors can directly remove breeding sites.

The supplied information does not state incubation duration, fledging period or age at maturity.

A cuckoo chick has been recorded being fed by adult Buff-sided Robins, indicating that brood parasitism can occur.

Breeding season: Mostly October to March, with some nesting also recorded in the dry season

Clutch size: Usually two eggs

Egg size: About 17.8 to 20.3 mm long

Incubation period: Not stated in the supplied information

Age at maturity: Not stated in the supplied information

Lifespan: Average recorded lifespan about 1.5 years; the longest-lived banded male was recorded for more than 9 years

Breeding habitat: Nest habitat

Nests are usually near water in dense plants. They are placed on a horizontal or vertical fork of a tree or shrub, commonly 1 to 3 m above the ground, although higher nests can occur.

Nest material includes twigs, bark, vines and grass, bound with cobwebs and often lined with grass, roots or feathers.

Eggs vary from light green to dark olive-green and may have reddish-brown or purplish-buff markings.

• Search dense riparian vegetation and low forks within 1 to 3 m of the ground before clearing during the main breeding period.
• Use a staged clearing approach where practicable, with a fauna spotter catcher checking retained vegetation and likely nest forks.
• Do not assume that a dry-season clearing window is free of nests, because nesting has also been recorded outside the main October to March period.

Sheltering habitat: Cover and refuge

The supplied information does not describe separate roost structures, hollows, burrows or dens. Shelter and security are provided mainly by dense riparian vegetation, low branches and thick understorey.

The species uses dense river forests, freshwater mangrove, pandanus, bamboo and monsoon vine-thicket vegetation for cover.

Adults are generally resident and may hold the same area for many years. Males and pairs appear to maintain local areas, although the extent and boundaries of territories are not known.

The species can occur in small remnant forest patches, including patches separated from rivers or other suitable habitat.

• Retain dense understorey and low branches within riparian buffers rather than retaining only mature canopy trees.
• Protect connected vegetation around river margins, tributaries and wet thickets during construction.
• Inspect isolated remnant patches as potential refuge and resident habitat before removal.

Sheltering habitat: Nest refuge

The nest is the only specifically described shelter structure. It is a shallow nest in a tree or shrub fork, usually 1 to 3 m above ground and close to water.

No measurements are provided for roost height, territory size, hollow use or night roost sites.

Typical nest height: 1 to 3 m above ground, with some nests higher

Nest location: Horizontal or vertical fork in dense vegetation near water

Threats: Clearing and fragmentation

The main project risk is loss or deterioration of dense riparian habitat. The species is not listed under the EPBC Act in the supplied information, but it is Near Threatened in the Northern Territory and should be considered where works affect riverine vegetation.

Clearing riparian forest removes feeding, shelter and nesting habitat. At the McArthur River project, 10.7 ha was estimated to support two pairs.

The same project assessed this loss as 2.7% of the available habitat within the mine leases and considered it unlikely to affect local population viability, but the impact was still assessed as a medium inherent and residual risk.

Fragmentation can reduce the amount of connected dense vegetation available to resident pairs. The species can move between isolated remnant patches, but its average recorded movement was only about 1 km and the maximum recorded movement was 3 km.

• Avoid clearing dense riparian vegetation and river bends where practicable.
• Fence and clearly mark no-go areas before machinery enters the work zone.
• Retain links between patches of riparian forest rather than leaving isolated canopy remnants.

Threats: Grazing, fire and land use

Cattle and other feral herbivores can damage river forests and monsoon vine forests. The supplied project assessment found that Buff-sided Robins appeared less affected by grazing than some other riparian birds, but grazing remains a source of habitat degradation.

Changed fire regimes can reduce monsoon vine-thicket habitat and promote more open forest. Farming and land clearing can further reduce and break up suitable vegetation.

Fire planning should prevent intense or repeated fire from damaging dense riverine and vine-thicket vegetation.

• Keep construction fire, hot works and burn piles away from retained riparian and vine-thicket vegetation.
• Use weed, erosion and sediment controls to protect the understorey and ground layer used for foraging.
• Prevent livestock and feral herbivores from entering protected riparian refuges where site controls allow.

Threats: Hydrology and water quality

Changes to river flows, groundwater or surface-water quality can affect the riverside vegetation on which the species depends.

The McArthur River assessment identified acid mine drainage as a potential pathway because sulphates and metals could affect riverine vegetation. It also reported that modelled water quality was not expected to deteriorate substantially in the key McArthur River habitat under that project.

The assessment described monitoring of groundwater and surface-water quality, seepage collection and other controls to identify whether further action was needed.

• Keep sediment, contaminated runoff, fuels and chemicals out of drainage lines and riparian vegetation.
• Maintain flow paths and avoid unnecessary drawdown or dewatering near dense riverine habitat.
• Monitor retained riparian vegetation where works may alter groundwater, seepage or surface-water quality.

Threats: Predators, roads and climate

Feral cats occur throughout the species' range and may prey on small to medium-sized birds, including birds that feed or nest close to the ground.

The supplied information identifies climate change, increasing temperatures, altered rainfall and extreme weather as additional risks, especially because the species has a restricted habitat association and does not travel far.

The supplied documents do not provide species-specific road mortality data. Vehicle movements through retained riparian habitat should nevertheless be managed as a general construction risk, particularly during dawn and dusk activity periods.

• Keep site facilities, food waste and other attractants managed so they do not increase feral predator activity near retained habitat.
• Use low speeds and wildlife awareness controls on roads beside riverine vegetation.
• Schedule noisy or high-disturbance works away from active nests where practicable, and stop work if a nest is located in the immediate clearing footprint.

Survey methodology: 1. Riparian bird searches

Survey this species in dense riparian forest, monsoon vine thicket and other wet vegetation near rivers and major tributaries. The supplied documents do not provide a formal national survey guideline, so use the documented McArthur River riparian monitoring program as a practical reference and tailor effort to the size and risk of the project area.

Search retained and potentially disturbed riparian vegetation by walking slowly through suitable habitat and recording all visual and auditory detections.

Prioritise tall, dense riverine vegetation containing Melaleuca leucadendra, Nauclea orientalis, Ficus racemosa, Terminalia platyphylla, Pandanus aquaticus and Barringtonia acutangula.

Survey early in the morning and late in the afternoon, when the species is most vocal. Record clear whistles, repeated two or three note sequences, and chatter calls.

Search close to the ground and through the lower forest strata. The species usually forages within 3 metres of the ground and often flies from a perch to a hard surface to take insects.

Typical habitat: Dense riparian forest, freshwater mangrove, pandanus and bamboo vegetation, and monsoon vine thicket near water.

Foraging height: Usually within 3 metres of the ground.

Most vocal periods: Early morning and late afternoon.

• Map each detection with coordinates, habitat type, waterway, vegetation condition and behaviour.
• Record whether the bird is using the area for foraging, movement, territorial behaviour, nesting or roosting.
• Repeat searches in all habitat patches that could be affected, including isolated remnants and vegetation beside temporary access tracks.

Survey methodology: 2. Seasonal timing and repeat visits

Use repeat surveys where the first visit is affected by rain, strong wind, high heat, poor visibility, construction noise or other conditions that reduce detection.

Include surveys during the warmer wet season, when most breeding occurs, from October to March. Also survey during the dry season where works may affect resident riparian habitat or where access and detectability are better.

Use the documented McArthur River program as a scale reference: biannual surveys were conducted at 27 riparian sites during the early dry season, May to July, and late dry season, October to November.

Documented monitoring frequency: Biannual surveys.

Documented survey periods: May to July and October to November.

Breeding period: Usually October to March, with some nesting also possible in the dry season.

• Plan survey timing around the proposed clearing sequence, so that each habitat patch is checked shortly before disturbance.
• Treat a single negative survey as insufficient evidence of absence where dense riparian habitat remains suitable.
• Document survey date, start and finish time, weather, observer names, noise, visibility, water conditions and any constraints.

Survey methodology: 3. Banding and targeted monitoring

Use capture, banding or other marking only under the relevant wildlife research authority and by appropriately trained personnel.

Consider targeted banding or resighting where the project may remove riparian habitat, fragment a resident pair's area or require monitoring of movement between retained patches.

The McArthur River program used riparian bird banding to track movements and recruitment, with a focus on resident riparian specialists including the buff-sided robin.

Documented riparian survey effort: 1,040 avian survey hours from 2006 to 2016.

Documented monitoring sites: 27 sites on the McArthur River and Barney Creek.

Known movement pattern: Adults are generally resident, with banding data showing average movements of about 1 kilometre and a maximum recorded movement of 3 kilometres.

• Do not use mist nets, traps or handling as routine pre-clearance methods unless the approved method, animal ethics requirements and permit conditions support them.
• If capture is approved, prepare a species-specific handling, weather and release protocol before fieldwork begins.
• Record band number, age or sex where known, capture location, release location, condition and subsequent resightings.

Survey methodology: Minimum effort and reporting

• Survey every suitable riparian patch within and immediately beside the disturbance footprint, including habitat proposed for access, stockpiles, compounds and drainage works.
• Complete repeat surveys when conditions reduce detectability or when a resident bird, pair or nest is detected and the work program could affect it.
• Use dawn or late afternoon searches, and include the documented May to July and October to November periods where the project schedule allows.
• Record all sightings, calls, nests, foraging observations, band numbers, carcasses and injured birds with coordinates and photographs where this can be done without disturbance.
• Submit confirmed records and survey data to the relevant Northern Territory or other state or territory wildlife database, according to the jurisdiction of the project.
• Report survey limitations, negative results and the basis for concluding that habitat is absent, unsuitable or retained.

Before habitat disturbance: Avoid and minimise habitat loss

Treat dense riparian vegetation as the primary constraint on works. The species is strongly associated with tall riverine forest and is resident in suitable habitat, so avoidance and staged clearing should be considered before fauna handling is planned.

Documented project example: A McArthur River project assessed loss of 10.7 hectares of riparian habitat supporting an estimated two pairs.

Proportion of local habitat in that assessment: 2.7 percent of habitat within the MRM leases.

• Retain mature riparian forest, dense understorey, pandanus, bamboo, freshwater mangrove and monsoon vine thicket wherever practicable.
• Avoid clearing the McArthur River type of habitat containing Melaleuca leucadendra, Nauclea orientalis, Ficus racemosa, Terminalia platyphylla, Pandanus aquaticus and Barringtonia acutangula.
• Maintain connected vegetation along waterways and between retained patches, because adults usually remain in one area and documented movements are generally short.
• Keep machinery, laydown areas, vehicle routes, lighting and spoil outside retained riparian vegetation and its drainage lines.
• Do not assume that grazing has removed habitat value. The supplied assessment states that buff-sided robins appear unaffected by grazing and can occur beyond cattle exclusion areas.

Before habitat disturbance: Approvals and work planning

Northern Territory status: Near Threatened.

EPBC status in supplied material: Not listed.

• Check the current EPBC Act protected matters status before finalising the design. The supplied listing states that the species is not listed under the EPBC Act, but the responsible environmental officer must confirm the current register and whether another protected matter is triggered.
• Check the relevant state or territory threatened species listing, fauna handling requirements, scientific permits and wildlife rehabilitation arrangements before work starts.
• Treat the species as Near Threatened in the Northern Territory and include it in the fauna management plan where suitable habitat occurs.
• Schedule clearing outside the usual October to March breeding period where practicable, and require a pre-clearance check for active nests at any time of year.
• Stage works so that retained riparian habitat remains connected and available while adjacent areas are cleared.

Before habitat disturbance: Site preparation

• Complete a pre-clearance survey shortly before works, concentrating on dense riparian forest, river margins and isolated patches of suitable vegetation.
• Mark approved clearing limits and install exclusion fencing around retained riparian vegetation, drainage lines and any active nest or occupied habitat that must be protected.
• Brief the operator, supervisor and fauna spotter catcher on the species' appearance, calls, habitat, stop-work triggers and reporting requirements.
• Identify a nearby retained release area before clearing begins. Select habitat with dense riparian vegetation and a connection to the affected patch where practicable.
• Confirm the location of the nearest veterinarian and authorised wildlife carer, and carry suitable transport and first-aid equipment for injured birds.

During habitat disturbance: Daily controls

Use a controlled clearing sequence with a fauna spotter catcher present during all high-risk work in suitable habitat. The objective is to prevent injury, retain escape routes and avoid damage to adjoining riverine vegetation.

• Inspect exclusion fencing and clearing limits before work each day.
• Keep machinery within approved limits and prevent vehicles, workers and materials from entering retained riparian vegetation.
• Clear from the disturbed edge towards retained habitat so birds have an opportunity to move into suitable vegetation.
• Use the lowest practical speed and avoid rapid, uncontrolled removal of dense vegetation beside watercourses.
• Suspend work during conditions that prevent the spotter catcher from seeing the work area, including heavy rain, smoke, darkness or excessive dust.
• Control dust, sediment, contaminated runoff, weeds and fire so that retained riverine vegetation is not degraded.

During habitat disturbance: Spotter catcher and machinery coordination

• Position the fauna spotter catcher where the active work area, escape route and adjoining retained vegetation can all be seen.
• Maintain direct communication between the spotter catcher, machine operator and supervisor before each new clearing movement.
• Stop the machine immediately when the spotter catcher signals, identifies a bird, nest or unexpected habitat feature, or loses visual control of the work area.
• Allow the bird to move into retained habitat without pursuit where it can leave the work area safely.
• Use only an appropriately authorised person for capture, handling or release. Do not ask machine operators or untrained workers to catch the bird.

During habitat disturbance: If a bird or nest is found

• Stop work in the immediate area and establish a temporary exclusion zone that protects the bird, nest and access route.
• Observe first and handle only when necessary to prevent injury or when required by an approved fauna management procedure.
• Do not disturb an active nest or remove nest material unless the relevant authority has approved the action and an authorised person is conducting it.
• If the bird leaves unaided, keep machinery stopped until the spotter catcher confirms that it has reached retained habitat and is not returning to the work face.
• If relocation is necessary, release the bird into nearby retained dense riparian habitat that is connected to the affected area where practicable.
• Transport an injured bird in a secure, dark, ventilated container and arrange prompt assessment by a veterinarian or authorised wildlife carer.
• Do not release a bird into an isolated, dry or unsuitable patch simply because it is close to the work area.

During habitat disturbance: Stop-work triggers and records

• Stop work if a buff-sided robin is injured, trapped, repeatedly returning to the clearing face, or detected in vegetation that has not been approved for removal.
• Stop work if an active nest, occupied nest tree or previously unrecorded dense riparian habitat is identified within the clearing area.
• Stop work if sediment, seepage, contaminated runoff, fire or machinery is affecting retained riverine vegetation or water quality.
• Record the date, time, location, habitat, action taken, personnel involved, animal condition, release or treatment details and photographs where appropriate.
• Report injuries, deaths, nest disturbance, unauthorised clearing and repeated stop-work events to the project environmental officer and the relevant regulator where required.

After habitat disturbance: Post-clearance checks

Post-clearance work must confirm that the approved footprint was respected and that retained riparian habitat remains functional. Monitor the local pair or population where clearing removes occupied habitat or changes water quality.

• Inspect the full clearing boundary for injured or dead birds, trapped fauna, damaged exclusion fencing and unapproved vegetation loss.
• Check retained riparian vegetation for sediment deposition, erosion, dust, altered drainage, weeds, fire damage and signs of contaminated runoff.
• Confirm that all temporary access, stockpile and compound areas have been removed from retained habitat.
• Repeat bird searches in retained habitat after clearing, using the same locations and observation methods as the pre-clearance survey where practicable.
• Record whether the resident pair or birds previously detected in the work area are still using retained habitat.

After habitat disturbance: Monitoring and adaptive management

Documented local trend: The local McArthur River population remained stable during monitoring from 2006 to 2016.

Documented water quality concern: The assessment identified contaminated groundwater or surface runoff as a potential risk if it affected riverside vegetation.

• Continue monitoring at suitable riparian sites where the project removes occupied habitat, affects a waterway or creates a risk to vegetation quality.
• Use repeat observations, call detections and resighting of marked birds where an approved banding program is already in place.
• Investigate any reduction in detections together with habitat condition, water quality, fire, grazing, feral animal activity and construction disturbance.
• Apply additional controls if retained habitat declines or birds abandon an area during works.

After habitat disturbance: Close-out and offsets

• Provide the regulator and approval holder with final clearing areas, habitat loss, fauna interactions, injuries, mortalities, nest records, releases and monitoring results.
• Update spatial habitat maps to show cleared, retained, rehabilitated and protected riparian vegetation.
• Maintain any approval conditions, exclusion fencing, water quality controls, fire controls and fauna monitoring for the period specified in the approval or fauna management plan.
• Assess offsets or other compensatory measures if required by an approval, permit or state policy. Prioritise protection and restoration of dense riparian habitat within the same catchment where the legal framework allows.

Rehabilitation actions: Rebuild suitable vegetation

Rehabilitation should rebuild dense, structurally complex riparian habitat near water. Success depends on restoring the vegetation layers used for cover, nesting and low-level foraging, not only establishing a tree canopy.

Documented habitat structure: Tall riparian forest with canopy and sub-canopy trees and a dense understorey.

Foraging requirement: Most hunting occurs close to the ground, usually within 3 metres.

• Use locally appropriate native riparian species, including Melaleuca leucadendra, Nauclea orientalis, Ficus racemosa, Terminalia platyphylla, Pandanus aquaticus and Barringtonia acutangula where suitable to the site and approved seed provenance.
• Restore a dense understorey and sub-canopy, with connected vegetation from the water margin into adjoining retained forest.
• Reinstate natural drainage and prevent sediment, mine affected water, agricultural runoff and other pollutants from entering rehabilitated habitat.
• Link rehabilitation areas to retained riverine forest rather than creating isolated plantings in open ground.

Rehabilitation actions: Fire, grazing, weeds and predators

• Manage fire so that dense monsoon vine thicket and riparian forest are not repeatedly burned or converted to more open forest.
• Control invasive weeds before they dominate the understorey or alter access to water.
• Exclude or manage cattle, water buffalo and feral pigs where they damage riverine vegetation, banks or regeneration.
• Include feral cat risk in the project fauna management plan, particularly where birds forage or nest close to the ground.
• Do not use broad predator or dingo control without assessing whether it could increase feral cat activity in retained habitat.

Rehabilitation actions: Monitoring and success measures

Relevant monitoring timing: The documented program surveyed riparian birds in May to July and October to November.

Species response measure: Presence, repeated detections, foraging and territorial or breeding behaviour in rehabilitated habitat.

• Inspect rehabilitation after wet and dry seasons and after major fire or flood events.
• Measure survival and growth of planted trees, regeneration of understorey, canopy cover, weed cover, bank stability and connection to retained habitat.
• Use bird searches during early morning and late afternoon to test whether buff-sided robins return to rehabilitated areas.
• Treat successful establishment of dense riparian structure, continued water quality and repeated bird use as key outcomes, rather than relying only on plant survival.
• Document failures and replant, control weeds, repair erosion or adjust fire and grazing management where targets are not being met.

Sources

• Buff-sided robin Facts for Kids, kids.kiddle.co: https://kids.kiddle.co/Buff-sided_robin
• NOEF TERR ECOL 2017 FINAL, Northern Territory Government: https://ntepa.nt.gov.au/__data/assets/pdf_file/0004/407560/mrm_overburden_draft_eis_appendixX_terrestrial_ecology_impact_assessment_report.pdf