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Eastern Reef Egret (Egretta sacra)

The Eastern Reef Egret, also called the Reef Heron, is a coastal and tidal waterbird found around much of Australia, including estuaries, beaches, reef flats and tidal creeks. On works sites, clearing, shoreline activity, noise, dogs and changes to feeding or roosting areas can affect it. It is not listed as threatened nationally, although it is listed as Rare in South Australia, but is profiled as an EVNT species, is protected as a migratory species under the EPBC Act, and has state-based conservation categories in some states.

Conservation status

South Australia, National Parks and Wildlife Act 1972: Rare. This listing covers only Egretta sacra sacra.

Breeding season

Eastern Reef Egrets breed in Australia, with breeding activity recorded in most months. In northern Australia, nesting is generally concentrated in the late dry season, while timing can vary between islands, regions and years.

Breeding mode: Egg-laying bird. Eastern Reef Egrets nest singly, in small colonies, or in mixed colonies with other species.

Clutch size: Usually 2 to 3 eggs. Four eggs are occasional and five eggs are rare.

Nest sites: Nests may be on the ground, near cliff edges, or in bushes and trees. Recorded nest plants include Argusia, Guettarda and Scaevola.

Nest height: Recorded nests ranged from a few centimetres above ground to 2.5 m at West Island. Nests may occur up to 3 m high.

Young: Nests may contain one to three chicks. Chicks develop from dark downy hatchlings to nearly fledged young, then remain near the nest after fledging.

Incubation and fledging: Not recorded.

Breeding frequency: Not recorded. Active nests and young have been recorded in most months in northern Australia, with variable timing within a season.

Timing varies between northern and southern Australia, and between years, colonies and islands, so checks for active nests and dependent young are needed before works in suitable habitat at any time of year.

  • Breeding and nesting, mainly northern Australia: Breeding is documented in most months, with the main nesting period in the late dry season and a recorded pause in April 2010 at Ashmore Reef.
  • Eggs, nestlings and dependent young: Eggs, small chicks and large chicks can occur at the same time, so dependent young may be present across much of the breeding period.
  • Adult foraging and high tide roosting: Adults use intertidal areas and reef flats for foraging, with vegetated islands and sandbanks used for high tide roosting.
  • Local movement between feeding and roosting areas: Regular local movement is expected between low tide feeding areas and high tide roosts, although seasonal movement timing is not established.
  • Highest clearing risk: Clearing and construction near coastal shrubs, ground vegetation, islands, sandbanks or other breeding habitat are most likely to affect nests and dependent young from September to November, but breeding can occur at other times.

Identification: Appearance

The Eastern Reef Egret is a heron-like waterbird with two colour morphs. Identification can be difficult where it occurs with other egrets, especially when birds are distant, backlit or partly hidden by mangroves and shoreline vegetation.

Adults are either grey or white. The grey morph is sometimes called the blue morph. Grey birds are the usual form in temperate southern Australia.

White and grey birds may occur together and can interbreed. In South Australia, only grey morphs have been recorded in the available field history. A white morph in southern New South Wales or Victoria is unusual and should be documented carefully.

Body size and weight: No reliable size or weight figures are given here. Record photographs and field notes rather than estimating size from memory.

  • Compact heron shape with a relatively short, sturdy bill and legs suited to shallow water and rocky shorelines.
  • Often seen standing still on exposed reef, mud, rock or sand, or walking slowly along a tidal creek.
  • May fly low along the shoreline or between feeding and high tide roosts.

Identification: Calls and similar species

Calls are not well documented in the site records. Do not rely on a call alone for identification.

Check grey birds carefully against other grey herons and egrets. White-faced Herons and Little Egrets may be confused with Eastern Reef Egrets, particularly by inexperienced observers or in poor light.

Useful comparison: The Eastern Reef Egret is strongly associated with exposed coastal and tidal habitat. A heron in inland freshwater habitat alone should not be assumed to be this species.

  • Use habitat, body shape, bill and leg proportions, behaviour and colour pattern together.
  • Obtain a clear photograph from a distance where the identification is uncertain.
  • Have a suitably experienced bird observer confirm unusual records, especially white morphs in southern states.

Identification: Field signs

Look for birds walking along tidal margins, feeding on reef flats at low tide, or resting on vegetated islands, sandbanks and shoreline vegetation at high tide.

Nests are usually concealed and may be difficult to detect during a ground inspection. They can appear as a flat platform or pile of sticks and dead stalks.

  • Droppings, whitewash, feathers and tracks may occur below regular perches or roosts.
  • Repeated use of one mangrove, shrub, sandbank or island at high tide may indicate a roost.
  • Do not approach a suspected nest or roost closely where binoculars or a spotting scope can be used.

Distribution: Australian range

The Eastern Reef Egret occurs around almost the entire mainland coast of Australia, with gaps and local declines in some southern areas. It also occurs widely through the western Pacific and parts of South-East Asia.

The species is mapped in New South Wales, the Northern Territory, Queensland, South Australia, Victoria and Western Australia. It uses coastal and tidal areas in these states, although local abundance varies greatly.

It is a breeding resident along parts of the New South Wales coast. In Victoria it is now very uncommon, with recent records concentrated around Gippsland and Mallacoota. It is a rare vagrant in Tasmania, where it was formerly more widespread.

Important Australian sites: Ashmore Reef, Cartier Island and Browse Island support documented populations or breeding records in north-west Australia.

  • Northern Territory: records include the Greater Darwin region, Lee Point and Sandy Creek, as well as the Alligator Rivers region and Kakadu National Park.
  • Queensland: coastal mainland and island records are relevant, including the Torres Strait islands.
  • Western Australia: the species occurs along the mainland coast and offshore islands, including north-west Australian islands.
  • South Australia and Victoria: records are mainly associated with coastal and estuarine areas.
  • Ashmore Reef: breeding has been recorded on West, Middle and East Islands.

Distribution: Overseas range

The wider range extends from Japan and South Korea through Bangladesh and New Guinea, and across the south-western Pacific. The species is also known from islands and reefs well offshore from Australia.

  • Offshore islands and coral cays can support breeding or high tide roosting birds.
  • A coastal record may therefore represent a local resident, a bird moving between nearby islands, or a bird using the site during tidal movements.

Distribution: Site assessment

A single bird may be significant at a site where the species is locally uncommon, particularly in Victoria, Tasmania or parts of southern Australia. Absence during one visit does not demonstrate that suitable habitat is unused.

Local records: Two records were held within 10 kilometres of one assessed site near Iluka in October 2016.

  • Check the site and adjacent shoreline at low tide for feeding birds.
  • Check nearby vegetated islands, sandbanks, mangroves and shrubs around high tide for roosting birds.
  • Review local atlas records and consult the relevant state wildlife authority when a project may affect coastal habitat.

Habitat: Shoreline and wetland features

The Eastern Reef Egret is mainly associated with the maritime littoral and tidal waters. On a development site, assess the full area used by the bird, including feeding margins, high tide roosts and vegetation used for nesting.

Suitable habitat includes exposed reefs, rocky shores, beaches, estuarine mudflats, mangrove-lined shores and islands. The species also uses tidal reaches of rivers and creeks.

Reef flats are important feeding areas when exposed at low tide. At high tide, birds may move to vegetated islands, sandbanks or nearby shoreline vegetation.

  • Rock platforms and boulder shores.
  • Sandy beaches and tidal sandbanks.
  • Mudflats, creek mouths and estuary edges.
  • Mangrove margins and tidal channels.
  • Coral cays, reef flats and low offshore islands.

Habitat: Vegetation and landform

Look for low islands, sandbanks, cliff edges and shrubs close to tidal water. Breeding and roosting birds may use vegetation that appears sparse or exposed from a distance.

At Ashmore Reef, nests have been recorded in Argusia argentea, Guettarda speciosa and Scaevola shrubs. On some islands, birds nest on or close to the ground among herbaceous vegetation.

  • Dense coastal shrubs above the high tide line.
  • Mangrove and estuary vegetation.
  • Low herbaceous cover on islands and sandbanks.
  • Sheltered creek margins near open feeding areas.

Habitat: Freshwater and tidal creek interfaces

Although the species is sometimes mapped within freshwater habitat classifications, the field records show a strong association with tidal and coastal environments. Tidal freshwater reaches, creek mouths and estuarine margins should be assessed where they connect to the coast.

  • Inspect both banks and the creek mouth.
  • Retain access between feeding shallows and nearby roost vegetation.
  • Consider effects on water quality, tidal flow, bank stability and shoreline cover.

Foraging habitat: Foraging areas

Eastern Reef Egrets forage alone or in small numbers along shallow tidal margins. Feeding activity is most likely to be detected around low tide, when reef flats, mudflats and creek edges are exposed.

The species forages on exposed reef flats, rocky shores, beaches, mudflats, estuary edges and tidal creeks. At Sandy Creek in the Greater Darwin region, birds were recorded foraging and walking along the creek margin.

The diet is not described in the field records. Treat shallow water, exposed substrate and prey-bearing intertidal habitat as feeding habitat.

Feeding behaviour: Birds may stand motionless, walk slowly along the waterline, or move between shallow pools while foraging.

  • Reef flats exposed during low tide.
  • Shallow creek margins and estuary channels.
  • Rock pools, beach wrack and mudflat edges.
  • Mangrove-lined tidal channels.

Foraging habitat: Survey timing and method

A practical survey should cover at least one low tide period and one high tide period where the project may affect shoreline habitat. Watch from a distance and avoid walking through likely feeding areas.

Documented survey example: A Greater Darwin survey used two hour counts centred on high tide and observed from 100 metres or more to reduce disturbance.

  • Use binoculars and a spotting scope where available.
  • Record tide state, weather, bird numbers, behaviour and exact habitat used.
  • Map feeding areas separately from roosts and nest sites.
  • Repeat observations where a single visit may have been affected by weather, boat traffic or other disturbance.

Foraging habitat: Works site risks

Clearing, reclamation, bank works, vehicle access, lighting, vessels and people can reduce feeding time or remove access to shallow water. Sediment, fuel, concrete washout and other pollutants can affect birds directly or reduce prey availability.

  • Keep machinery and people out of active feeding areas where practicable.
  • Prevent runoff, spills and concrete washout from entering tidal water.
  • Maintain movement between reef flats, creek margins and high tide roosts.
  • Schedule noisy shoreline work outside periods of confirmed high use where practicable.

Breeding habitat: Nest sites

The species nests singly or in small colonies, and may breed with other waterbirds. Nests can be concealed in shrubs, on the ground or near cliff edges, so clearing inspections must cover more than obvious trees.

Nests may be placed on the ground, on cliff edges, in bushes or in trees. Recorded nest heights range from a few centimetres above the ground to 2.5 metres, and nests may occur up to 3 metres high.

At Ashmore Reef, nests have been found in Argusia argentea, Guettarda speciosa and Scaevola shrubs. Other coastal shrubs and low vegetation may also be used.

Nest structure: A large, flat platform or pile of sticks and dead stalks, often well concealed.

  • Dense coastal shrubs near beaches, reefs and tidal flats.
  • Low herbaceous vegetation on islands and sandbanks.
  • Sheltered cliff edges and elevated shoreline vegetation.
  • Mixed waterbird nesting areas.

Breeding habitat: Breeding timing

At Ashmore Reef, breeding is described as occurring in the late dry season, although active nests have been recorded in most months and years. Eggs, small chicks and large chicks may be present at the same time.

Usually 2 to 3 eggs are laid. Four eggs occur occasionally and five are rare.

  • Treat any active nest, chick or dependent fledgling as a breeding record.
  • Do not clear or heavily disturb a nest shrub until a qualified ecologist has assessed the situation.
  • Record the nest location, vegetation, eggs or chicks, adult behaviour and likely access route.

Breeding habitat: Breeding survey guidance

Inspect suitable coastal shrubs and ground cover before clearing. Use binoculars or a spotting scope first, as nests may be difficult to see and close approach can cause adults to leave eggs or chicks exposed.

Where a nest or colony is found, establish a site-specific exclusion area with the project ecologist and wildlife authority. The appropriate area and duration will depend on visibility, topography, activity and the response of the birds.

  • Survey the proposed footprint and nearby vegetation that could be affected by noise, vibration, dust or access.
  • Avoid cutting branches, moving nest material or handling eggs or chicks.
  • Use non-intrusive nest mapping where possible.
  • Recheck the area if works are delayed or if birds continue to show nesting behaviour.

Sheltering habitat: Roost locations

High tide can displace feeding birds from reef flats and mudflats to nearby roosts. Protecting the link between feeding areas and sheltered high tide habitat is often more useful than protecting either feature in isolation.

Documented high tide roosts include vegetated islands and sandbanks. Birds may also use coastal shrubs, mangrove edges, creek margins and other quiet shoreline vegetation.

The species does not require a separate built shelter. Roosts may be exposed, low and difficult to distinguish from surrounding habitat.

  • Vegetated islands and offshore sandbanks.
  • Shrubs above the high tide line.
  • Quiet mangrove and estuary margins.
  • Low herbaceous cover on coastal islands.

Sheltering habitat: Signs of regular use

Repeated bird presence at the same high tide location, whitewash below perches, feathers and concentrated droppings can indicate regular use. The absence of visible signs does not rule out a roost, particularly on sand or rock.

  • Survey around high tide and record the number of birds present.
  • Note whether birds flush in response to people, dogs, vehicles or boats.
  • Map access tracks, launch points, viewing areas and other disturbance sources near the roost.

Sheltering habitat: Protection during works

Keep workers, machinery, vehicles, dogs and recreational activity away from active roosts. Use existing access routes where possible and avoid creating new tracks through shoreline vegetation.

Where a roost is repeatedly used, retain the vegetation and landform that provides shelter. Manage lighting and night work so birds are not repeatedly flushed.

  • Fence or mark sensitive roost areas before construction starts.
  • Brief all workers and fauna spotter catchers on the location and response procedure.
  • Stop and reassess works if birds repeatedly flush, circle, or abandon a roost.

Threats: Clearing and habitat loss

The Eastern Reef Egret is nationally least concern, but local populations can be affected by loss of coastal habitat and repeated disturbance. Apply proportionate controls where birds, nests or roosts are found, especially in states with additional conservation categories.

Removal of coastal shrubs, mangroves, creek banks, islands, sandbanks or low herbaceous cover can remove nests, roosts and access to feeding areas. Habitat transformation has been associated with declines over recent decades.

  • Avoid clearing suitable nest shrubs and high tide roost vegetation.
  • Retain shoreline buffers and natural tidal connections where practicable.
  • Stage works to keep alternative feeding and roosting habitat available.

Threats: Disturbance and displacement

People, dogs, boats, jet skis, aircraft, vehicles, noise and repeated approach can flush birds from feeding or roosting areas. Disturbance was recorded around Sandy Creek, although a species-specific response was not established.

Use the least disturbing observation method. A distance of 100 metres or more was used during one waterbird survey to reduce disturbance, but the suitable distance at a particular site will depend on terrain and bird behaviour.

  • Keep observers and machinery away from active roosts and nests.
  • Use spotters, exclusion fencing and clear access controls.
  • Reduce unnecessary vessel movement, lighting and loud work near shoreline habitat.

Threats: Pollution and water quality

Oil, sediment, fuel, concrete washout and other contaminants may affect birds directly or reduce prey in reef flats and tidal waters. Oil exposure was identified as a potential impact for Ashmore Reef waterbirds.

  • Prepare spill response equipment before works begin.
  • Keep fuels, chemicals and washout areas away from drainage lines and tidal water.
  • Inspect exclusion controls after rain, tides and storm events.

Threats: Status and management response

The species is not nationally listed as endangered, vulnerable or near threatened. It is nevertheless protected as a migratory species under the EPBC Act through its CAMBA listing and should be managed as an EVNT profile species for project assessment.

South Australia and Tasmania list the species as Rare, which is the near threatened equivalent in those states. Western Australia assigns Priority 4, a non-statutory category for rare and near threatened species that need monitoring. In Queensland, near threatened animals are protected wildlife, and interference with a breeding place may require a species management program.

  • Use targeted low tide and high tide surveys where suitable habitat is present.
  • Escalate a record of nesting, repeated roost use or injury to the project ecologist and relevant wildlife authority.
  • For clearing or construction near a nest or colony, use a site-specific exclusion, timing and monitoring plan rather than relying on a generic buffer.
  • Record all observations, including zero counts, tide state, disturbance and habitat condition, to support local management.

Survey methodology: 1. Desktop assessment

Eastern Reef Egrets are coastal and estuarine herons that also use tidal creeks, reef flats, beaches, rocky shores, mudflats, mangroves and vegetated islands. They can be difficult to detect, particularly when nesting in concealed shrubs or near the ground, so surveys should cover both feeding habitat and nearby roosting and breeding habitat.

Map exposed reefs, rocky shores, beaches, mudflats, tidal creeks, mangroves, estuaries, reef flats and vegetated coastal areas near the work site.

Check wildlife atlas records, local bird records and recent records from nearby estuaries, islands and coastal reserves.

Identify likely high tide roosts, low tide feeding areas, coastal scrub and shrubs that could hold concealed nests.

Treat the species as poorly known in many regions. Use local records and habitat assessment rather than assuming that a lack of records means absence.

Survey methodology: 2. Site inspection and observation

Survey during daylight at low tide and around high tide where practicable. Low tide is suitable for detecting birds feeding on reef flats, mudflats and creek edges. High tide is suitable for checking vegetated islands, sandbanks, beach margins and other roosts.

Search from a distance that avoids flushing birds. Use binoculars and a spotting scope where available. Do not approach suspected nests closely unless this is necessary for an authorised assessment.

Walk or scan the full accessible shoreline, creek edge and adjacent vegetation. Check shrubs and trees that could hold nests, including coastal bushes and dense herbaceous vegetation.

Repeat observations when visibility, tide, weather or public activity reduces detection.

Survey methodology: 3. Breeding and habitat search

Look for adults carrying sticks, repeated flights to one location, alarm behaviour, chicks, eggs and flat stick platforms in shrubs, trees, on cliff edges or on the ground.

Inspect suitable coastal shrubs and ground vegetation systematically where access is safe. Nests can be concealed and may occur singly, in small colonies or with other waterbirds.

Give particular attention to vegetation adjacent to feeding areas. On some islands, nests occur in shrubs above the ground. Elsewhere, nests may be on or close to the ground.

Do not enter a suspected colony or handle vegetation until the fauna ecologist has assessed the site.

Survey methodology: 4. Records and survey conditions

Record the date, start and finish time, tide state, weather, observers, survey route, survey area and visibility.

Record the number of birds, age class where apparent, colour morph, location, behaviour, flight direction, feeding area, roost and any nest or chick observations.

Map all observations and potential breeding, roosting and feeding areas with GPS. Record nearby people, dogs, boats, aircraft, vehicles, noise, lighting and other disturbance.

Photograph habitat and birds only when this can be done without causing disturbance. Keep nest locations confidential where public access could create a risk.

Before habitat disturbance: 1. Approvals and permits

Plan works to avoid feeding areas, high tide roosts and breeding habitat wherever practicable. The species is not listed as threatened nationally, but it has migratory protection and some state or regional conservation categories may apply, so confirm the approvals pathway before clearing or construction.

Ask the project ecologist to check whether the action could affect a listed migratory species under the Environment Protection and Biodiversity Conservation Act 1999. Consider an EPBC referral where the action may have a significant impact on relevant habitat or birds.

In Queensland, check whether the species is treated as near threatened or protected wildlife at the site. Obtain or comply with a species management program where work could tamper with a breeding place.

Check state and territory wildlife legislation, reserve rules, local permits and development conditions before work starts. Obtain any required authority for nest inspection, fauna handling, exclusion or relocation.

Check South Australian, Tasmanian and Western Australian listings where relevant. A local category such as Rare or Priority 4 may require additional assessment, monitoring or agency consultation even where the species is not nationally threatened.

Before habitat disturbance: 2. Avoidance and work planning

Redesign the footprint to retain intertidal feeding habitat, tidal creek margins, coastal scrub, vegetated islands, sandbanks and known roosts.

Keep machinery, materials, access tracks, lighting and people away from mapped nests, colonies and roosts. Set a site-specific buffer with the fauna ecologist and relevant authority. Do not apply a generic buffer without considering tide, visibility, vegetation and disturbance levels.

Avoid clearing during active breeding wherever practicable. Breeding timing varies by region. At Ashmore Reef, breeding is described as occurring in the late dry season, but active nests have been recorded in most months.

There is no reliable national migration calendar for this species. Schedule work outside periods of local concentration where site records show regular seasonal use.

Before habitat disturbance: 3. Pre-clearance survey

Complete a pre-clearance inspection shortly before works, after the desktop assessment and before vegetation removal, access preparation or dewatering.

Search the entire disturbance area and adjoining habitat that could be affected by noise, vibration, lighting, people or changed drainage.

Check for adults, eggs, chicks, recently fledged birds, nests, repeated flight paths, roosting birds and feeding concentrations. Use low tide and high tide observations where the site contains tidal habitat.

If an active breeding place, colony or regular roost is found, stop planning in that area and obtain advice from the fauna ecologist and relevant regulator before proceeding.

Before habitat disturbance: 4. Exclusion and induction

Mark approved no-go areas on plans and on the ground. Use fencing or signage that does not block bird movement or access to feeding habitat.

Brief all workers, supervisors, machine operators and subcontractors on the species, its nests and chicks, no-go areas, lighting controls and the stop-work process.

Prohibit chasing, feeding, collecting, photographing at close range and unauthorised handling.

Place the fauna spotter catcher or nominated fauna supervisor in the work briefings. Give that person authority to stop work when a bird, nest, colony or roost may be at risk.

During habitat disturbance: 1. Sequential clearing

Use a staged, low-disturbance method and keep a clear line of authority on site. Eastern Reef Egrets may use concealed nests and can be associated with other waterbirds, so every unexpected bird or nest should be assessed before work continues.

Clear in small, defined stages, starting with the least sensitive part of the site and progressing towards retained habitat where practicable.

Have the fauna spotter catcher inspect each stage immediately before clearing. Check shrubs, ground vegetation, creek edges, beach margins and structures that could conceal nests or resting birds.

Keep escape routes open towards suitable retained habitat. Do not isolate birds between machinery, fencing, trenches or stockpiles.

Stop work when visibility is poor, flooding prevents inspection, or noise and dust prevent reliable detection.

During habitat disturbance: 2. Stop-work and handling authority

The fauna spotter catcher or fauna supervisor must be authorised by the project and relevant regulator to direct a stop-work response.

Only authorised, appropriately trained people may catch, move or restrain an Eastern Reef Egret. Do not handle a healthy bird simply to clear it from the work area.

Give an uninjured bird time to leave if it can move safely without being chased. Keep workers and machinery back and maintain a clear route to suitable habitat.

Do not touch eggs, chicks or nests unless the action has been approved and is being directed by the relevant wildlife authority or qualified fauna professional.

During habitat disturbance: 3. Active breeding place, colony or roost

Stop work and establish a quiet exclusion area if an active nest, chick, breeding place, colony or concentrated roost is found.

Record the location, number of birds, nest contents, behaviour, habitat and the activity that caused the risk. Photograph from a safe distance if useful.

Contact the project ecologist and relevant regulator or permit holder. Do not resume work within the exclusion area until the approved response is confirmed.

For a roost, reduce noise, vehicle movement, people, dogs and night lighting. For a colony or breeding area, retain access to feeding habitat and avoid disturbance to adults moving between the nest and water.

During habitat disturbance: 4. Injured or trapped animal response

Stop nearby work and keep people, dogs and machinery away from the bird.

Contact the project fauna supervisor and a licensed wildlife carer, veterinarian or wildlife rescue service. Follow the applicable state or territory protocol.

If immediate capture is necessary, use only trained and authorised personnel. Keep the bird in a dark, quiet, ventilated container suitable for its size, with minimal handling. Do not offer food or water unless directed by a wildlife professional.

Record the time, location, apparent injury, capture method, people involved and destination. Arrange assessment and release only through the wildlife professional.

During habitat disturbance: 5. Daily records

Record daily searches, clearing stages, bird sightings, nests, roosts, stop-work events, handling, injuries, releases and regulator contacts.

Map any changed exclusion areas and update the site plan and induction material.

Report non-compliance, unauthorised handling, nest damage, bird injury or death immediately to the site manager, project ecologist and relevant authority.

Retain photographs, GPS data, permits, fauna logs and incident forms with the project environmental records.

After habitat disturbance: 1. Post-clearance inspection

Post-clearance checks confirm that no birds, nests or breeding places were missed and that retained habitat remains usable. Review every incident before the next work stage, particularly where birds were flushed or a nest was found.

Inspect the cleared area, retained vegetation, creek edges, shoreline and nearby roosts after each clearing stage.

Check for injured, trapped or disoriented birds, damaged nests, abandoned eggs, chicks, fallen branches and access barriers.

Search work areas again after machinery leaves, especially around stockpiles, trenches, temporary fencing and drainage controls.

Keep exclusion areas in place until the fauna ecologist confirms that the risk has ended or the approved permit condition has been met.

After habitat disturbance: 2. Monitoring retained habitat

Monitor mapped feeding areas at low tide and roosts at high tide where works could alter access, noise, lighting, water quality or shoreline condition.

Check whether birds continue to use retained habitat and whether they are being displaced into unsafe areas such as roads, active work zones or public recreation areas.

Continue monitoring for active nests where work overlaps the breeding period or where adults show repeated territorial or nest attendance behaviour.

Use the same locations and observation method where possible so changes can be compared over time.

After habitat disturbance: 3. Relocated or rescued animals

Keep a record of every animal moved, including identification, condition, capture location, release location, time, handler and authority.

Release healthy birds only when directed by the fauna professional, at an appropriate nearby habitat location with safe access to water and no immediate construction risk.

Do not release a bird into an active colony, onto a road, into a confined work area or where dogs and people are concentrated.

Follow up rescued or injured birds through the wildlife carer or veterinarian. Record the outcome where it is available.

After habitat disturbance: 4. Reporting and incident review

Provide completion records to the project manager, ecologist, approval holder and regulator where required by a permit or condition.

Review the cause of every stop-work event, nest disturbance, injury, death, unauthorised handling or unexpected concentration of birds.

Update the clearing sequence, buffers, lighting, access controls and crew induction before the next work stage.

Use the records to improve future surveys and to identify recurring feeding, roosting or breeding sites.

Rehabilitation actions: 1. Restore feeding and roosting habitat

Rehabilitation should restore the habitat functions used by the species, not only replace vegetation cover. Prioritise shoreline, creek, mudflat, reef flat, roosting and coastal scrub values, with local advice guiding plant selection and site design.

Reinstate natural drainage and tidal exchange where these have been altered by construction.

Restore creek margins, mudflats, beach edges, rocky shore features, mangroves and coastal shrubs where they formed part of the original habitat.

Retain or recreate undisturbed vegetated areas and sandbanks above high tide for roosting. Keep these areas free of stockpiles, vehicles, dogs and unnecessary public access.

Remove temporary barriers that prevent birds moving between feeding areas and high tide roosts, but retain controls where people or predators would create a continuing risk.

Rehabilitation actions: 2. Replace breeding vegetation and structures

Replant locally appropriate coastal shrubs and trees where nests were removed or breeding vegetation was damaged. Use species and forms that can provide dense cover and stable nesting branches.

Do not install nest boxes or bat boxes as a default measure. Eastern Reef Egrets use ground sites, cliff edges, shrubs and trees, and artificial boxes are not a standard replacement for their breeding habitat.

Where an approved offset or rehabilitation plan requires an artificial nest site, have the design, placement and maintenance specified by a qualified ornithologist and relevant authority. Keep it away from regular people, dogs and machinery.

Do not construct artificial roost structures unless monitoring shows a site-specific need and the design has been approved by the project ecologist and relevant authority.

Rehabilitation actions: 3. Weeds, water and contamination

Control invasive plants that smother coastal shrubs, creek margins, mudflats or access to feeding habitat. Use methods that avoid disturbing active nests and minimise chemical exposure near water.

Protect water quality during earthworks. Prevent sediment, concrete washout, hydrocarbons, rubbish and other contaminants from entering tidal creeks, estuaries, reef flats or shoreline habitat.

Maintain natural water levels and tidal flows. Do not create stagnant pools, sharp drainage changes or steep open trenches that trap birds.

Prepare an incident response for fuel, chemical and sewage spills, including immediate containment and notification of the relevant authority.

Rehabilitation actions: 4. Lighting and disturbance controls

Keep lighting directed away from shorelines, roosts, nest vegetation and tidal feeding areas.

Use the lowest practical light output, shielded fittings and task lighting only where needed. Turn off temporary lighting when work stops.

Limit night work, loud activity, vehicle movement and public access near known roosts and breeding areas.

Retain signs and barriers around rehabilitated habitat until vegetation is established and monitoring shows that the area is safe for use.

Rehabilitation actions: 5. Long-term monitoring

Inspect rehabilitation after construction, after major rainfall and during the period when local records indicate breeding or regular roost use.

Record vegetation establishment, weed cover, erosion, tidal connection, water quality, disturbance and Eastern Reef Egret use.

Monitor nests, chicks, feeding birds and roosting birds without approaching closely or repeatedly flushing them.

Adapt planting, access controls, lighting and weed treatment if birds do not return or if they are displaced into hazardous areas.

Sources