Concept of serious and irreversible impacts
The concept of serious and irreversible impacts is about protecting the threatened species and threatened ecological communities (collectively called threatened entities) most at risk of extinction from potential development.
The Biodiversity Offsets Scheme recognises that there are some types of serious and irreversible impacts that the community expects will not occur except in certain circumstances. Potential serious and irreversible impacts are identified by accredited assessors in either a Biodiversity Assessment Development Report or a Biodiversity Certification Assessment Report, and the decision maker makes a determination.
Determining serious and irreversible impacts
An impact is to be regarded as serious and irreversible if it is likely to contribute significantly to the risk of a threatened species (including endangered populations) or an ecological community becoming extinct based on the following 4 principles set out in clause 6.7 of the Biodiversity Conservation Regulation 2017 (NSW):
- The impact will cause a further decline of a species or ecological community that is currently observed, estimated, inferred or reasonably suspected to be in a rapid rate of decline.
- The impact will further reduce the population size of the species or ecological community that is currently observed, estimated, inferred or reasonably suspected to have a very small population size.
- The impact is made on the habitat of the species or ecological community that is currently observed, estimated, inferred or reasonably suspected to have a very limited geographic distribution.
- The impacted species or ecological community is unlikely to respond to measures to improve its habitat and vegetation integrity and therefore its members are not replaceable.
The decision maker is responsible for deciding whether an impact is likely to be serious and irreversible. This decision is to be made in accordance with the principles set out in clause 6.7 of the Biodiversity Conservation Regulation 2017. The decision maker will also consider the Guidance to help a decision maker to determine a serious and irreversible impact, which includes criteria and supporting information to assist with applying these principles.
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Information about serious and irreversible impacts must be prepared by an accredited assessor using the Biodiversity Assessment Method. The information must be presented to the decision maker in a Biodiversity Assessment Report for the proposal.
As described in section 9.1 of the Biodiversity Assessment Method, the accredited assessor preparing the report is responsible for:
- identifying every potential serious and irreversible impact entity
- evaluating the nature of the impact on each entity
- documenting efforts to avoid and minimise impacts on biodiversity in accordance with the assessment criteria.
Learn about the Biodiversity Assessment Method.
Serious and irreversible impact assessment criteria
Assessment of a serious and irreversible impact is only required where a Biodiversity Assessment Report is used to assess the impacts of the development under the Biodiversity Offsets Scheme. The Biodiversity Assessment Report forms part of the development application considered by the decision maker.
Accredited assessors must identify all entities at risk of a serious and irreversible impact that would be impacted by the proposal, including:
- those identified on the department’s list of threatened entities (below on this page)
- any other entities that are likely to meet the principles set out in clause 6.7 of the Biodiversity Conservation Regulation 2017.
Accredited assessors must include in their Biodiversity Assessment Report an assessment of the impact against the criteria set out in section 9.1 of the Biodiversity Assessment Method, including where the presence of a species at risk of serious and irreversible impact has been assumed. Where there is assumed presence of a species at risk of serious and irreversible impact, an expert report may be needed to provide the required information.
For each entity, accredited assessors must also address the additional serious and irreversible impact assessment criteria listed in the following subsections of the Biodiversity Assessment Method:
- subsection 9.1.1 for threatened ecological communities
- subsection 9.1.2 for threatened species.
If an accredited assessor considers a principle not to be relevant to a threatened entity at risk of a serious and irreversible impact, justification must be provided within the Biodiversity Assessment Report. The accredited assessor may also provide new information that can be used to demonstrate that the principle identifying the entity at risk of a serious and irreversible impact is inaccurate.
Effect of a serious and irreversible impact
The following table sets out the effect of determining a serious and irreversible impact for different types of development and activities if they require assessment under the Biodiversity Offsets Scheme.
| Type of development or activity | Effect of serious and irreversible impacts |
|---|---|
| The decision maker must not grant approval if they determine the proposal is likely to have a serious and irreversible impact on biodiversity values. |
| The decision maker can approve a proposal that is likely to have serious and irreversible impacts. The decision maker must consider those impacts and determine whether any additional and appropriate measures will minimise those impacts if approval is to be granted. |
Threatened entities
The department has identified some threatened entities listed under the Biodiversity Conservation Act 2016 (NSW) as at risk of serious and irreversible impacts.
The department’s list of entities at risk of a serious and irreversible impact is not exhaustive or definitive. A decision maker may require consideration of an entity not listed by the department as an entity at risk of potential serious and irreversible impact. There must be suitable evidence (information and data) to demonstrate that a determination of serious and irreversible impact has been made in accordance with the principles.
Accredited assessors and subscribing local government officers are notified when changes to the list occur. To receive updates, subscribe to the Biodiversity Offsets Scheme Updates newsletter.
The Biodiversity Assessment Method does not apply to biodiversity that is endemic to Lord Howe Island. Therefore, the department’s list does not contain entities endemic to Lord Howe Island.
List of threatened entities
| Ecological communities | Principle | |||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Agnes Banks Woodland in the Sydney Basin Bioregion | 1 | 2 | 3 | – |
| Allocasuarina luehmannii Woodland in the Riverina and Murray-Darling Depression Bioregions | 1 | 2 | – | – |
| Araluen Scarp Grassy Forest in the South East Corner Bioregion | – | – | 3 | – |
| Artesian Springs Ecological Community in the Great Artesian Basin | – | 2 | 3 | – |
| Blue Gum High Forest in the Sydney Basin Bioregion | 1 | 2 | 3 | – |
| Blue Mountains Basalt Forest in the Sydney Basin Bioregion | – | – | 3 | – |
| Brigalow within the Brigalow Belt South, Nandewar and Darling Riverine Plains Bioregions | 1 | – | – | – |
| Byron Bay Dwarf Graminoid Clay Heath Community | – | – | 3 | – |
| Coastal Upland Swamps in the Sydney Basin Bioregion | – | – | – | 4 |
| Cooks River/Castlereagh Ironbark Forest in the Sydney Basin Bioregion | 1 | 2 | – | – |
| Coolac-Tumut Serpentinite Shrubby Woodland in the NSW South Western Slopes and South Eastern Highlands Bioregions | – | 2 | 3 | – |
| Cumberland Plain Woodland in the Sydney Basin Bioregion | 1 | 2 | – | – |
| Dry Rainforest of the South East Forests in the South East Corner Bioregion | – | – | 3 | – |
| Duffys Forest Ecological Community in the Sydney Basin Bioregion | 1 | – | – | – |
| Eastern Suburbs Banksia Scrub in the Sydney Basin Bioregion | 1 | 2 | 3 | – |
| Elderslie Banksia Scrub Forest | – | – | 3 | – |
| Fuzzy Box Woodland on alluvial soils of the South Western Slopes, Darling Riverine Plains and Brigalow Belt South Bioregions | 1 | 2 | 3 | – |
| Genowlan Point Allocasuarina nana Heathland | – | – | 3 | – |
| Grey Box—Grey Gum Wet Sclerophyll Forest in the NSW North Coast Bioregion | – | – | 3 | – |
| Hunter Floodplain Red Gum Woodland in the NSW North Coast and Sydney Basin Bioregions | 1 | 2 | – | – |
| Hunter Valley Weeping Myall Woodland in the Sydney Basin Bioregion | 1 | 2 | 3 | – |
| Hygrocybeae community of Lane Cove Bushland Park in the Sydney Basin Bioregion | – | 2 | 3 | – |
| Illawarra Lowlands Grassy Woodland in the Sydney Basin Bioregion | 1 | 2 | 3 | – |
| Illawarra Subtropical Rainforest in the Sydney Basin Bioregion | – | 2 | – | – |
| Kincumber Scribbly Gum Forest in the Sydney Basin Bioregion | – | – | 3 | – |
| Low woodland with heathland on indurated sand at Norah Head | – | – | 3 | – |
| Mallee and Mallee-Broombush dominated woodland and shrubland, lacking Triodia, in the NSW South Western Slopes Bioregion | – | 2 | – | – |
| Maroota Sands Swamp Forest | – | – | 3 | – |
| Marsh Club-rush sedgeland in the Darling Riverine Plains Bioregion | 1 | 2 | 3 | – |
| Melaleuca armillaris Tall Shrubland in the Sydney Basin Bioregion | 1 | 2 | 3 | – |
| Milton Ulladulla Subtropical Rainforest in the Sydney Basin Bioregion | – | – | 3 | – |
| Mount Gibraltar Forest in the Sydney Basin Bioregion | – | – | 3 | – |
| Mount Kaputar high elevation and dry rainforest land snail and slug community in the Nandewar and Brigalow Belt South Bioregions | – | – | 3 | – |
| Mount Canobolas Xanthoparmelia lichen community | – | – | 3 | – |
| Monaro Tableland Cool Temperate Grassy Woodland in the South Eastern Highlands Bioregion | 1 | 2 | – | – |
| New England Peppermint (Eucalyptus nova-anglica) Woodland on Basalts and Sediments in the New England Tableland Bioregion | 1 | 2 | – | – |
| Newnes Plateau Shrub Swamp in the Sydney Basin Bioregion | – | – | 3 | 4 |
| Pittwater and Wagstaffe Spotted Gum Forest in the Sydney Basin Bioregion | – | – | 3 | – |
| Porcupine Grass—Red Mallee—Gum Coolabah hummock grassland/low sparse woodland in the Broken Hill Complex Bioregion | – | – | 3 | – |
| Quorrobolong Scribbly Gum Woodland in the Sydney Basin Bioregion | – | – | 3 | – |
| Robertson Basalt Tall Open-forest in the Sydney Basin and South Eastern Highlands Bioregions | 1 | – | – | – |
| Robertson Rainforest in the Sydney Basin Bioregion | – | 2 | – | – |
| Shale Sandstone Transition Forest in the Sydney Basin Bioregion | – | 2 | 3 | – |
| Snowpatch Feldmark in the Australian Alps Bioregion | – | – | 3 | – |
| Snowpatch Herbfield in the Australian Alps Bioregion | – | – | 3 | – |
| Southern Highlands Shale Woodlands in the Sydney Basin Bioregion | 1 | 2 | – | – |
| Sun Valley Cabbage Gum Forest in the Sydney Basin Bioregion | 1 | 2 | 3 | – |
| Sydney Turpentine-Ironbark Forest | 1 | 2 | – | – |
| Tableland Basalt Forest in the Sydney Basin and South Eastern Highlands Bioregions | 1 | 2 | – | – |
| The Shorebird Community occurring on the relict tidal delta sands at Taren Point | – | – | 3 | – |
| Umina Coastal Sandplain Woodland in the Sydney Basin Bioregion | – | – | 3 | – |
| Warkworth Sands Woodland in the Sydney Basin Bioregion | – | – | 3 | – |
| Werriwa Tablelands Cool Temperate Grassy Woodland in the South Eastern Highlands and South East Corner Bioregions | 1 | 2 | – | – |
| Western Sydney Dry Rainforest in the Sydney Basin Bioregion | – | – | 3 | – |
| White Box Yellow Box Blakely’s Red Gum Woodland | 1 | 2 | – | – |
| Windswept Feldmark in the Australian Alps Bioregion | – | – | 3 | – |
| Species | Species | Principle | |||
|---|---|---|---|---|---|
| (scientific name) | (common name) | 1 | 2 | 3 | 4 |
| Acacia acrionastes | Pindari wattle | – | – | 3 | – |
| Acacia atrox | Myall Creek wattle | – | – | 3 | 4 |
| Acacia bakeri | Marblewood | – | 2 | – | – |
| Acacia carneorum | Purple-wood wattle | – | – | – | 4 |
| Acacia chrysotricha | Newry golden wattle | – | – | 3 | – |
| Acacia constablei | Narrabarba wattle | 1 | – | 3 | – |
| Acacia courtii | North brother wattle | – | – | 3 | – |
| Acacia dangarensis | – | – | – | 3 | – |
| Acacia jucunda | Yetman wattle | – | – | 3 | – |
| Acacia meiantha | – | – | – | 3 | – |
| Acacia pendula population in the Hunter catchment | – | – | – | – | 4 |
| Acacia petraea | Lancewood | – | – | 3 | – |
| Acacia phasmoides | Phantom wattle | – | – | 3 | – |
| Acacia pubifolia | Velvet wattle | – | – | – | 4 |
| Acacia rivalis | Creek wattle | – | – | 3 | – |
| Acronychia littoralis | Scented Acronychia | – | 2 | – | – |
| Adelotus brevis | Tusked frog population in the Nandewar and New England Tableland bioregions | – | 2 | – | 4 |
| Aldrovanda vesiculosa | Waterwheel plant | – | – | 3 | – |
| Alexfloydia repens | Floyd's grass | – | – | 3 | – |
| Allocasuarina glareicola | – | – | – | 3 | 4 |
| Allocasuarina portuensis | Nielsen Park she-oak | – | 2 | 3 | – |
| Allocasuarina simulans | Nabiac casuarina | – | – | 3 | – |
| Amyema plicatula | – | – | 2 | 3 | – |
| Amytornis barbatus barbatus | Grey grasswren | – | – | 3 | – |
| Amytornis modestus obscurior | Thick-billed grasswren (north-west NSW subspecies) | – | 2 | 3 | – |
| Amytornis striatus striatus | – | – | – | 3 | – |
| Angiopteris evecta | Giant fern | – | 2 | 3 | – |
| Angophora exul | Gibraltar rock apple | – | 2 | 3 | – |
| Anthochaera phrygia | Regent honeyeater | 1 | 2 | – | – |
| Antrophyum austroqueenslandicum | – | 1 | 2 | 3 | – |
| Aponogeton queenslandicus | – | – | – | 3 | – |
| Archidendron hendersonii | White lace flower | – | – | 3 | – |
| Argynnis hyperbius | Laced fritillary | 1 | 2 | 3 | – |
| Assa wollumbin | Wollumbin hip pocket frog | – | – | 3 | – |
| Asterolasia beckersii | Dungowan starbush | – | 2 | 3 | – |
| Asterolasia buxifolia | – | – | 2 | 3 | – |
| Asterolasia elegans | – | – | – | 3 | – |
| Asterolasia rupestris subsp. recurva B.J.Mole | – | – | 2 | 3 | – |
| Astrotricha cordata | Heart-leaved star hair | – | – | 3 | – |
| Astrotricha crassifolia | Thick-leaf star-hair | – | 2 | 3 | 4 |
| Astrotricha sp. Wallagaraugh | Merimbula star-hair | – | – | 3 | – |
| Austrostipa nullanulla | A spear-grass | – | – | 3 | – |
| Backhousia subargentea | Giant ironwood | 1 | 2 | 3 | – |
| Baeckea kandos | – | – | 2 | 3 | – |
| Baloghia marmorata | Jointed baloghia | – | 2 | 3 | – |
| Banksia conferta | – | – | – | 3 | – |
| Banksia vincentia | Banksia vincentia | 1 | 2 | 3 | – |
| Bertya ingramii | Narrow-leaved bertya | – | 2 | 3 | – |
| Bertya opponens | Coolabah bertya | – | – | 3 | – |
| Bertya sp. (Chambigne NR, M. Fatemi 24) | Chambigne bertya | – | – | 3 | – |
| Boronia boliviensis | Bolivia Hill boronia | – | – | 3 | – |
| Boronia inflexa subsp. torringtonensis | – | – | 2 | 3 | – |
| Boronia repanda | Granite rose | – | – | 3 | – |
| Boronia ruppii | Rupp's boronia | – | 2 | 3 | – |
| Bossiaea bombayensis | Bombay bossiaea | – | – | 3 | – |
| Bossiaea fragrans | Bossiaea fragrans | – | 2 | 3 | – |
| Brachyscome ascendens | Border Ranges daisy | – | 2 | 3 | – |
| Brachyscome muelleroides | Claypan daisy | – | – | 3 | – |
| Bulbophyllum globuliforme | Hoop Pine orchid | – | – | 3 | – |
| Caesalpinia bonduc | Knicker nut | – | 2 | – | – |
| Caladenia arenaria | Sand-hill spider orchid | – | – | 3 | – |
| Caladenia attenuata | Duramana fingers | – | 2 | 3 | – |
| Caladenia concolor | Crimson spider orchid | – | – | 3 | – |
| Caladenia tessellata | Thick lip spider orchid | 1 | – | 3 | – |
| Calidris ferruginea | Curlew sandpiper | 1 | – | – | – |
| Callistemon megalongensis | Megalong Valley bottlebrush | – | – | 3 | – |
| Callistemon purpurascens | – | – | 2 | 3 | – |
| Callitris baileyi | Bailey's cypress pine | – | – | 3 | – |
| Callitris oblonga subsp. corangensis | – | – | 3 | – | |
| Callitris oblonga subsp. parva | 1 | – | – | – | |
| Calochilus pulchellus | Pretty beard orchid | – | 2 | 3 | – |
| Calomnion complanatum | – | – | 2 | 3 | 4 |
| Calotis glandulosa | Mauve burr-daisy | 1 | – | – | – |
| Calotis moorei | A burr-daisy | – | – | 3 | – |
| Calyptorhynchus banksii banksii | Red-tailed black-cockatoo (coastal subspecies) | 1 | 2 | – | 4 |
| Camarophyllopsis kearneyi | – | – | – | 3 | – |
| Capparis canescens | Wild orange | 1 | 2 | 3 | – |
| Caretta caretta | Loggerhead turtle | 1 | – | – | – |
| Carex archeri | Archer's carex | – | – | 3 | – |
| Carex klaphakei | Klaphake's sedge | – | – | 3 | – |
| Cassia marksiana | – | 1 | 2 | – | – |
| Casuarina obesa | Swamp she-oak | – | 2 | 3 | 4 |
| Chalinolobus dwyeri | Large-eared pied bat | – | – | – | 4 |
| Cheilanthes sieberi subsp. pseudovellea | – | – | – | 3 | – |
| Chiloglottis anaticeps | Bird orchid | – | 2 | 3 | – |
| Commersonia rosea | – | – | 2 | – | – |
| Convolvulus tedmoorei | Bindweed | – | 2 | – | – |
| Corchorus cunninghamii | Native jute | – | – | 3 | – |
| Corokia whiteana | Corokia | – | 2 | 3 | – |
| Correa lawrenceana var. genoensis | Genoa River correa | – | 2 | 3 | – |
| Corunastylis sp. Charmhaven (NSW896673) | – | 1 | – | 3 | – |
| Corynocarpus rupestris subsp. rupestris | Glenugie karaka | – | – | 3 | – |
| Crinia sloanei | Sloane’s froglet | – | – | 3 | – |
| Crotalaria cunninghamii | Green bird flower | – | – | 3 | – |
| Cucumis althaeoides | – | – | 2 | 3 | – |
| Cupaniopsis serrata | Smooth tuckeroo | – | – | 3 | – |
| Cyclopsitta diophthalma coxeni | Coxen's fig-parrot | 1 | 2 | – | – |
| Danhatchia copelandii | – | – | 2 | 3 | – |
| Daphnandra johnsonii | Illawarra Socketwood | – | – | – | 4 |
| Davidsonia johnsonii | Smooth davidson's plum | – | 2 | – | 4 |
| Dermochelys coriacea | Leatherback turtle | 1 | – | – | – |
| Deyeuxia appressa | – | – | 2 | 3 | – |
| Diospyros mabacea | Red-fruited ebony | – | 2 | – | – |
| Diploglottis campbellii | Small-leaved tamarind | – | 2 | – | – |
| Dipteracanthus australasicus subsp. corynothecus | – | – | – | 3 | – |
| Diuris arenaria | Sand doubletail | – | – | 3 | – |
| Diuris bracteata | – | – | 2 | 3 | – |
| Diuris byronensis | Byron Bay diuris | 1 | 2 | 3 | – |
| Diuris disposita | Willawarrin doubletail | – | 2 | 3 | – |
| Diuris flavescens | Pale yellow doubletail | – | – | 3 | – |
| Diuris ochroma | Pale golden moths | – | 2 | 3 | – |
| Diuris sp. (Oaklands, D.L. Jones 5380) | Oaklands diuris | – | – | 3 | – |
| Dodonaea sinuolata subsp. Acrodentata | A hopbush | – | – | 3 | – |
| Dodonaea stenozyga | Desert hopbush | – | 2 | 3 | – |
| Drynaria rigidula | Basket fern | – | 2 | 3 | – |
| Dysphania plantaginella | – | – | – | 3 | – |
| Egernia roomi | Kaputar rock skink | – | – | 3 | – |
| Eidothea hardeniana | Nightcap oak | – | 2 | 3 | – |
| Elaeocarpus williamsianus | Hairy quandong | 1 | 2 | – | 4 |
| Endiandra muelleri subsp. bracteata | Green-leaved rose walnut | 1 | – | – | – |
| Epacris sparsa | Sparse heath | – | 2 | 3 | – |
| Eriocaulon australasicum | Austral pipewort | – | – | 3 | – |
| Eriocaulon carsonii | Salt pipewort | – | 2 | 3 | – |
| Erodiophyllum elderi | Koonamore daisy | – | – | 3 | – |
| Erythrotriorchis radiatus | Red goshawk | 1 | 2 | 3 | – |
| Esacus magnirostris | Beach stone-curlew | – | 2 | – | – |
| Eucalyptus alligatrix subsp. Alligatrix | – | – | – | 3 | – |
| Eucalyptus aquatica | Broad-leaved sally | – | – | 3 | – |
| Eucalyptus benthamii | – | 1 | – | – | – |
| Eucalyptus boliviana | Bolivia stringybark | – | – | 3 | – |
| Eucalyptus camphora subsp. Relicta | Warra broad-leaved sally | – | – | 3 | – |
| Eucalyptus canobolensis | Silver-leaf candlebark | – | – | 3 | – |
| Eucalyptus castrensis | Singleton mallee | – | – | 3 | – |
| Eucalyptus copulans | – | – | 2 | 3 | 4 |
| Eucalyptus corticosa | Creswick apple box | – | – | 3 | – |
| Eucalyptus dissita | Gibraltar mallee | – | – | 3 | – |
| Eucalyptus fracta | Broken back ironbark | – | – | 3 | – |
| Eucalyptus imlayensis | Imlay mallee | – | 2 | 3 | 4 |
| Eucalyptus kartzoffiana | Araluen gum | – | – | 3 | – |
| Eucalyptus langleyi | Albatross mallee | – | – | 3 | – |
| Eucalyptus microcodon | Border mallee | – | 2 | 3 | – |
| Eucalyptus oresbia | Small-fruited mountain gum | – | – | 3 | – |
| Eucalyptus pachycalyx subsp. Banyabba | Banyabba shiny-barked gum | – | – | 3 | – |
| Eucalyptus pumila | Pokolbin mallee | – | – | 3 | – |
| Eucalyptus recurva | Mongarlowe mallee | 1 | 2 | 3 | 4 |
| Eucalyptus robertsonii subsp. hemisphaerica | Robertson's peppermint | – | 2 | 3 | – |
| Eucalyptus scoparia | Wallangarra white gum | – | – | 3 | – |
| Eucalyptus sp. Cattai | Eucalyptus sp. Cattai | – | – | 3 | – |
| Eucalyptus sp. Howes Swamp Creek | – | – | – | 3 | – |
| Eulamprus leuraensis | Blue Mountains water skink | – | – | – | 4 |
| Euphorbia sarcostemmoides | Climbing caustic | – | – | 3 | – |
| Euphrasia arguta | Euphrasia arguta | – | – | 3 | – |
| Euphrasia bella | Pretty eyebright | – | 2 | 3 | – |
| Euphrasia bowdeniae | – | – | 2 | – | – |
| Euphrasia collina subsp. muelleri | Mueller's eyebright | – | 2 | 3 | – |
| Euphrasia orthocheila subsp. peraspera | Tenterfield eyebright | – | – | 3 | – |
| Euphrasia scabra | Rough eyebright | – | – | 3 | – |
| Floydia praealta | Ball nut | 1 | 2 | – | – |
| Fontainea oraria | Coastal fontainea | – | 2 | 3 | – |
| Fontainea sp. Coffs Harbour | – | – | 2 | 3 | – |
| Galium australe | Tangled bedstraw | – | – | 3 | – |
| Geniostoma huttonii | Hutton’s geniostoma | – | 2 | 3 | – |
| Genoplesium baueri | Bauer's midge orchid | – | 2 | – | 4 |
| Genoplesium insigne | Variable midge orchid | – | – | 3 | – |
| Genoplesium littorale | Tuncurry midge orchid | – | – | 3 | – |
| Genoplesium plumosum | Tallong midge orchid | – | – | 3 | – |
| Genoplesium rhyoliticum | Rhyolite midge orchid | – | – | 3 | – |
| Genoplesium superbum | Superb midge orchid | – | 2 | – | – |
| Gentiana baeuerlenii | Baeuerlen's gentian | – | 2 | 3 | – |
| Gentiana bredboensis | Bredbo gentian | 1 | 2 | 3 | 4 |
| Gentiana wingecarribiensis | Wingecarribee gentian | 1 | 2 | 3 | – |
| Gentiana wissmannii | New England gentian | – | 2 | 3 | – |
| Geophaps scripta scripta | Squatter pigeon (southern subspecies) | 1 | 2 | 3 | – |
| Gingidia rupicola | – | – | 2 | 3 | – |
| Glycine latrobeana | – | – | – | 3 | – |
| Goodenia occidentalis | Western goodenia | – | – | 3 | – |
| Grevillea acanthifolia subsp. paludosa | Bog grevillea | – | 2 | 3 | – |
| Grevillea caleyi | Caley's grevillea | – | – | 3 | – |
| Grevillea divaricata | Grevillea divaricata | – | 2 | 3 | – |
| Grevillea kennedyana | Flame spider flower | – | – | – | 4 |
| Grevillea hilliana | White yiel yiel | – | 2 | 3 | – |
| Grevillea iaspicula | Wee jasper grevillea | – | – | 3 | – |
| Grevillea ilicifolia subsp. ilicifolia | Holly-leaf grevillea | – | 2 | 3 | – |
| Grevillea masonii | Mason's grevillea | – | – | 3 | – |
| Grevillea mollis | Soft grevillea | – | – | 3 | – |
| Grevillea molyneuxii | Wingello grevillea | – | – | 3 | – |
| Grevillea obtusiflora | Wingello grevillea | – | – | – | 4 |
| Grevillea renwickiana | Nerriga grevillea | – | – | – | 4 |
| Grevillea rhizomatosa | Gibraltar grevillea | – | – | – | 4 |
| Grevillea rivularis | Carrington Falls grevillea | – | – | 3 | – |
| Grevillea shiressii | – | – | – | 3 | – |
| Grevillea wilkinsonii | Tumut grevillea | – | – | 3 | – |
| Gyrostemon thesioides | – | – | 2 | 3 | – |
| Hakea dohertyi | Kowmung hakea | – | – | 3 | – |
| Hakea pulvinifera | Lake Keepit hakea | – | 2 | 3 | 4 |
| Haloragodendron lucasii | – | – | 2 | 3 | 4 |
| Hibbertia circinata | – | – | 2 | 3 | – |
| Hibbertia fumana | – | – | – | 3 | – |
| Hibbertia sp. Bankstown | Hibbertia sp. Bankstown | – | 2 | 3 | – |
| Hibbertia spanantha | Julian's hibbertia | – | 2 | 3 | – |
| Hibbertia tenuifolia | Narrow-leaved guinea flower | – | 2 | 3 | 4 |
| Homoranthus bebo | – | – | – | 3 | – |
| Homoranthus binghiensis | Binghi homoranthus | – | – | 3 | – |
| Homoranthus bruhlii | – | – | 2 | – | – |
| Homoranthus croftianus | Bolivia homoranthus | – | – | 3 | – |
| Homoranthus elusus | – | – | 2 | 3 | – |
| Hoplocephalus bungaroides | Broad-headed snake | – | – | – | 4 |
| Hygrocybe anomala var. ianthinomarginata | – | – | – | 3 | – |
| Hygrocybe aurantipes | – | – | – | 3 | – |
| Hygrocybe austropratensis | – | – | – | 3 | – |
| Hygrocybe collucera | – | – | – | 3 | – |
| Hygrocybe griseoramosa | – | – | – | 3 | – |
| Hygrocybe lanecovensis | – | – | – | 3 | – |
| Hygrocybe reesiae | – | – | – | 3 | – |
| Hygrocybe rubronivea | – | – | – | 3 | – |
| Indigofera efoliata | Leafless indigo | – | 2 | 3 | – |
| Indigofera helmsii | Indigo | – | – | 3 | – |
| Indigofera leucotricha | Silver indigo | – | – | 3 | – |
| Indigofera longibractea | Showy indigo | – | – | 3 | – |
| Ipomoea diamantinensis | Desert cow-vine | – | – | 3 | – |
| Ipomoea polymorpha | Silky cow-vine | – | 2 | 3 | – |
| Irenepharsus magicus | Elusive cress | – | 2 | 3 | – |
| Isopogon fletcheri | Fletcher's drumsticks | – | – | 3 | – |
| Jalmenus eubulus | Pale imperial hairstreak | 1 | 2 | 3 | – |
| Kardomia prominens | – | – | – | 3 | – |
| Kardomia silvestris | Woodland babingtonia | – | 2 | 3 | – |
| Kennedia retrorsa | – | – | – | 3 | – |
| Kippistia suaedifolia | Fleshy minuria | – | – | 3 | – |
| Lampropholis elongata | Long sunskink | – | – | 3 | – |
| Lasiopetalum behrii | Pink velvet bush | – | 2 | 3 | – |
| Lastreopsis hispida | Bristly shield fern | – | 2 | 3 | – |
| Lathamus discolor | Swift parrot | 1 | – | – | – |
| Leionema lachnaeoides | – | – | – | 3 | – |
| Leionema lamprophyllum subsp. fractum | – | – | 2 | – | – |
| Leionema westonii | – | – | 2 | 3 | – |
| Lenwebbia sp.Main Range | – | 1 | 2 | 3 | – |
| Lepiderema pulchella | Fine-leaved tuckeroo | – | 2 | – | – |
| Lepidium peregrinum | Wandering pepper cress | – | 2 | 3 | – |
| Lepidosperma evansianum | Evans sedge | – | – | 3 | – |
| Leptorhynchos waitzia | Button immortelle | – | – | 3 | – |
| Leucopogon confertus | Torrington beard-heath | – | – | 3 | – |
| Lindsaea fraseri | Fraser's screw fern | – | – | 3 | – |
| Litoria castanea | Yellow-spotted tree frog | 1 | 2 | 3 | 4 |
| Litoria piperata | Peppered tree frog | 1 | 2 | – | – |
| Litoria spenceri | Spotted tree frog | 1 | 2 | – | 4 |
| Litoria subglandulosa | Glandular frog | – | – | – | 4 |
| Lobelia claviflora | – | – | – | 3 | – |
| Lysimachia vulgaris var. davurica | Yellow loosestrife | – | – | 3 | 4 |
| Macrozamia humilis | Inverell cycad | – | 2 | 3 | – |
| Manorina melanotis | Black-eared miner | 1 | 2 | 3 | – |
| Melaleuca deanei | Deane's paperbark | – | – | – | 4 |
| Melichrus sp. Gibberagee | Narrow-leaf melichrus | – | – | 3 | – |
| Melicope vitiflora | Coast euodia | 1 | 2 | – | – |
| Micromyrtus grandis | Severn River heath-myrtle | – | – | 3 | – |
| Micromyrtus minutiflora | – | 1 | – | – | – |
| Microtis angusii | Angus's onion orchid | – | – | 3 | – |
| Miniopterus australis | Little bent-winged bat | – | – | – | 4 |
| Miniopterus orianae oceanensis | Large bent-winged bat | – | – | – | 4 |
| Mitrasacme pygmaea | Pygmy bishop's hat | – | 2 | 3 | – |
| Mixophyes balbus | Stuttering frog | – | – | – | 4 |
| Mixophyes fleayi | Fleay's barred frog | – | – | – | 4 |
| Monotoca rotundifolia | Trailing monotoca | – | – | 3 | – |
| Muellerina myrtifolia | Myrtle-leaf mistletoe | – | – | 3 | – |
| Myriophyllum implicatum | Myriophyllum implicatum | – | 2 | 3 | – |
| Myrsine richmondensis | Ripple-leaf muttonwood | – | 2 | 3 | – |
| Myuchelys georgesi | Bellinger River snapping turtle | 1 | – | 3 | – |
| Nematolepis rhytidophylla | Nalbaugh nematolepis | – | 2 | 3 | – |
| Neoastelia spectabilis | Silver sword lily | – | – | 3 | – |
| Neophema chrysogaster | Orange-bellied parrot | 1 | 2 | – | – |
| Niemeyera chartacea | Smooth-leaved plum | – | – | 3 | – |
| Nitella parooensis | – | – | – | 3 | – |
| Nitella partita | – | – | – | 3 | – |
| Nurus atlas | Atlas rainforest ground-beetle | – | – | 3 | – |
| Oberonia complanata | Yellow-flowered king of the fairies | – | 2 | 3 | – |
| Ochrosia moorei | Southern ochrosia | – | 2 | 3 | – |
| Oldenlandia galioides | Sweet false galium | – | 2 | – | – |
| Olearia flocktoniae | Dorrigo daisy bush | 1 | – | – | – |
| Osteocarpum scleropterum | Squash bush | – | – | 3 | – |
| Owenia cepiodora | Onion cedar | – | 2 | – | – |
| Pachycephala rufogularis | Red-lored whistler | – | 2 | – | – |
| Pedionomus torquatus | Plains-wanderer | 1 | – | – | – |
| Pelargonium sp. Striatellum | Omeo storksbill | – | – | – | 4 |
| Peristeranthus hillii | Brown Fairy-chain orchid | – | 2 | – | – |
| Persoonia hindii | – | – | 2 | 3 | – |
| Persoonia hirsuta | Hairy geebung | – | 2 | – | – |
| Persoonia pauciflora | North Rothbury persoonia | 1 | – | 3 | – |
| Petalura gigantea | Giant dragonfly | – | – | – | 4 |
| Petalura litorea | Coastal petaltail | – | – | – | 4 |
| Petrogale penicillata | Brush-tailed rock-wallaby | – | – | – | 4 |
| Petrogale xanthopus | Yellow-footed rock-wallaby | – | 2 | – | 4 |
| Phebalium bifidum | – | – | 2 | 3 | – |
| Phebalium glandulosum subsp. Eglandulosum | Rusty desert phebalium | – | – | 3 | – |
| Phebalium speciosum | – | – | – | 3 | – |
| Pherosphaera fitzgeraldii | Dwarf mountain pine | – | – | 3 | – |
| Pimelea axiflora subsp. Pubescens | Bungonia rice-flower | – | 2 | 3 | – |
| Pimelea bracteata | – | 1 | – | – | – |
| Pimelea cremnophila | – | – | 2 | 3 | – |
| Pimelea serpyllifolia subsp. serpyllifolia | Thyme rice-flower | – | – | 3 | – |
| Pimelea venosa | Bolivia Hill pimelea | – | 2 | 3 | – |
| Pittosporum kororoense | – | – | 2 | – | – |
| Plectranthus alloplectus | Narrow-leaved plectranthus | – | 2 | 3 | – |
| Plinthanthesis rodwayi | Budawangs wallaby grass | – | 2 | 3 | – |
| Polycarpaea spirostylis subsp. glabra | – | – | – | 3 | – |
| Pomaderris adnata | Sublime point pomaderris | – | – | 3 | – |
| Pomaderris cocoparrana | – | – | – | 3 | – |
| Pomaderris delicata | Delicate pomaderris | – | – | 3 | – |
| Pomaderris gilmourii var. cana | Grey deua pomaderris | – | 2 | 3 | – |
| Pomaderris pallida | Pale pomaderris | – | – | – | 4 |
| Pomaderris reperta | Denman pomaderris | – | – | 3 | – |
| Pomaderris sericea | Silky pomaderris | – | – | 3 | – |
| Pomaderris walshii | Carrington Falls pomaderris | – | 2 | 3 | – |
| Potorous longipes | Long-footed potoroo | – | 2 | – | – |
| Prasophyllum affine | Jervis Bay leek orchid | – | – | 3 | – |
| Prasophyllum bagoense | Prasophyllum bagoense | – | – | 3 | – |
| Prasophyllum canaliculatum | Summer leek orchid | – | 2 | 3 | – |
| Prasophyllum fuscum | Slaty leek orchid | – | 2 | 3 | – |
| Prasophyllum innubum | Prasophyllum innubum | – | – | 3 | – |
| Prasophyllum keltonii | Kelton's leek orchid | – | – | 3 | – |
| Prasophyllum sandrae | – | 1 | 2 | 3 | 4 |
| Prasophyllum sp. Moama | Prasophyllum sp. Moama | – | – | 3 | – |
| Prostanthera discolor | – | – | 2 | 3 | – |
| Prostanthera gilesii | – | – | 2 | 3 | 4 |
| Prostanthera marifolia | Seaforth mintbush | – | 2 | 3 | – |
| Prostanthera palustris | Swamp mint-bush | 1 | – | 3 | – |
| Prostanthera sejuncta | – | – | 2 | 3 | – |
| Prostanthera staurophylla | Tenterfield mint-bush | – | 2 | 3 | – |
| Pseudanthus ovalifolius | Oval-leafed pseudanthus | – | – | 3 | – |
| Pseudomys desertor | Desert mouse | – | 2 | 3 | – |
| Pseudomys fumeus | Smoky mouse | 1 | 2 | – | – |
| Pseudophryne corroboree | Southern corroboree frog | 1 | 2 | 3 | 4 |
| Pseudophryne pengilleyi | Northern corroboree frog | 1 | – | – | – |
| Psilotum complanatum | Flat fork fern | – | 2 | 3 | – |
| Pterostylis bicornis | Horned greenhood | – | 2 | 3 | – |
| Pterostylis despectans | Pterostylis despectans | – | 2 | 3 | – |
| Pterostylis metcalfei | Metcalfe's greenhood | – | – | 3 | – |
| Pterostylis nigricans | Dark greenhood | – | – | 3 | – |
| Pterostylis oreophila | Blue-tongued greenhood | – | 2 | 3 | – |
| Pterostylis pulchella | Waterfall greenhood | – | – | 3 | – |
| Pterostylis riparia | – | – | – | 2 | – |
| Pterostylis saxicola | Sydney Plains greenhood | – | – | – | 4 |
| Pterostylis sp. Botany Bay | Botany Bay bearded orchid | – | 2 | 3 | – |
| Pterostylis ventricosa | Pterostylis ventricosa | 1 | – | – | – |
| Pterostylis vernalis | Pterostylis vernalis | – | – | 3 | – |
| Pultenaea elusa | Elusive bush-pea | 1 | 2 | 3 | – |
| Pultenaea parrisiae | Parris' bush-pea | – | 2 | 3 | – |
| Pultenaea sp. Genowlan Point | Pultenaea sp. Genowlan point | 1 | 2 | 3 | – |
| Randia moorei | Spiny gardenia | – | 2 | – | – |
| Rhizanthella slateri | Eastern australian underground orchid | – | 2 | – | – |
| Rhodamnia maideniana | Smooth Scrub Turpentine | 1 | – | – | – |
| Rhodamnia rubescens | Scrub turpentine | 1 | – | – | 4 |
| Rhodomyrtus psidioides | Native guava | 1 | – | – | 4 |
| Rotala tripartita | – | – | – | 3 | – |
| Rytidosperma pumilum | Feldmark grass | – | – | 3 | – |
| Rytidosperma vickeryae | Perisher wallaby-grass | – | – | 3 | – |
| Sarcochilus dilatatus | Brown butterfly orchid | – | – | 3 | – |
| Sarcochilus weinthalii | Blotched sarcochilus | – | – | 3 | – |
| Scaevola collaris | Fan flower | – | – | 3 | – |
| Senecio linearifolius var. dangarensis | – | – | – | 3 | – |
| Senecio squarrosus | Swamp groundsel | – | 2 | 3 | – |
| Solanum armourense | – | 1 | 2 | – | – |
| Solanum limitare | Border Ranges nightshade | 1 | 2 | 3 | – |
| Stackhousia clementii | – | – | – | 3 | – |
| Styphelia perileuca | Montane green five-corners | – | – | 3 | – |
| Swainsona adenophylla | Violet swainson-pea | – | – | 3 | – |
| Swainsona flavicarinata | Yellow-keeled swainsona | – | – | 3 | – |
| Swainsona viridis | Creeping Darling pea | – | – | 3 | – |
| Syzygium moorei | Durobby | 1 | – | – | – |
| Tasmannia glaucifolia | Fragrant pepperbush | – | 2 | – | – |
| Thelymitra adorata | Wyong sun orchid | – | 2 | 3 | – |
| Thelymitra atronitida | Black-hooded sun orchid | – | 2 | 3 | – |
| Thelymitra kangaloonica | Kangaloon sun orchid | – | 2 | 3 | – |
| Thersites mitchellae | Mitchell's rainforest snail | 1 | – | 3 | – |
| Thinornis cucullatus cucullatus | Eastern Hooded Dotterel | – | 2 | – | – |
| Threlkeldia inchoata | Tall bonefruit | – | – | 3 | – |
| Triflorensia cameronii | Cameron's tarenna | – | 2 | 3 | – |
| Triplarina imbricata | Creek triplarina | – | 2 | – | – |
| Turnix melanogaster | Black-breasted button-quail | – | 2 | 3 | – |
| Tympanocryptis lineata | Canberra grassland earless dragon | 1 | 2 | 3 | – |
| Tympanocryptis mccartneyi | Bathurst Grassland Earless Dragon | – | – | 3 | – |
| Typhonium sp. aff. brownii | Stinky lily | 1 | 2 | – | – |
| Tyto tenebricosa | Sooty owl | – | – | – | 4 |
| Vespadelus troughtoni | Eastern cave bat | – | – | – | 4 |
| Wollemia nobilis | Wollemi pine | – | 2 | 3 | – |
| Xanthosia scopulicola | – | – | 2 | 3 | – |
| Xerothamnella parvifolia | – | – | 2 | 3 | – |
| Xylosma terrae-reginae | Queensland xylosma | – | 2 | – | – |
| Zieria adenodonta | Wollumbin zieria | – | – | 3 | – |
| Zieria adenophora | Araluen zieria | – | 2 | 3 | – |
| Zieria baeuerlenii | Bomaderry zieria | – | – | 3 | 4 |
| Zieria buxijugum | Box range zieria | 1 | 2 | 3 | – |
| Zieria citriodora | Lemon zieria | – | – | 3 | – |
| Zieria covenyi | Coveny's zieria | – | – | 3 | 4 |
| Zieria floydii | Floyd's zieria | – | – | 3 | – |
| Zieria formosa | Shapely zieria | – | 2 | 3 | – |
| Zieria lasiocaulis | Willi Willi zieria | – | – | 3 | – |
| Zieria obcordata | – | – | 2 | – | – |
| Zieria odorifera subsp. copelandii | – | – | 2 | 3 | – |
| Zieria odorifera subsp. warrabahensis | – | – | 2 | 3 | – |
| Zieria parrisiae | Parris' zieria | – | 2 | 3 | – |
| Zieria tuberculata | Warty zieria | – | – | 3 | – |
BioNet Threatened Biodiversity Data Collection
Searching the name of a threatened entity in the BioNet Threatened Biodiversity Data Collection will provide information about that entity, including whether it has been classified by the department as at risk of serious and irreversible impact and placed on the list.
BioNet is generally updated annually. Emergency updates may be necessary if there is new information or new listings by the NSW Threatened Species Scientific Committee.
Access the BioNet Threatened Biodiversity Data Collection.
Serious and irreversible impact nominations
If comprehensive data clearly demonstrates inaccuracies or omissions in the list of entities, we welcome nominations to update it. Anyone with such information can nominate to add or remove an entity and edit the relevant principles.
Once the public display period has closed, the department will:
- review all nominations
- review any feedback received during the public display phase
- either accept or reject the nominations.
Nominees will be informed of the decision.
Making a nomination
You can lodge your nomination by completing either:
- the threatened species (and endangered populations) at risk of serious and irreversible impacts nomination form
- the threatened ecological communities at risk of serious and irreversible impacts nomination form.
Please include supporting information such as:
- referenced literature
- survey data
- maps.
Providing this information with your nomination and completing the nomination form fully and accurately will assist with processing. Without strong evidence for a change, the department will not be able to accept a nomination.
Serious and irreversible impact nominations feedback
Serious and irreversible impact nominations will be publicly displayed on a provisional list for 21 days around May of each year. You can provide feedback on a publicly displayed nomination using either nomination form:
- the threatened species (and endangered populations) at risk of serious and irreversible impacts nomination form
- the threatened ecological communities at risk of serious and irreversible impacts nomination form.
Select the option ‘Provide feedback on a species currently being publicly displayed’.