Document ID: chunk:federal_register_of_legislation:F2025L00287:reg:3:p75
Version: federal_register_of_legislation:F2025L00287
Segment Type: reg
Provision Reference: reg 3 (pt 75/276)
Character Range: 293635–300969

baseline data was not available; however, recent monitoring has provided baseline data for Advena campbellii and A. suteri, and an initial survey of the recently rediscovered A. grayi was conducted in March 2023. The other two snails are presumed extinct.
For the remaining two reptiles and 15 plant species, recent population estimates are not available, so trends over the plan period cannot be determined.
Table 21 Species population estimates and trends from 2010 to 2023
Species type                                 Species                                     Common name                    EPBC Act status        Estimated population (2010) a  Estimated population (2023) a  Trend     Confidence in trend
Molluscs                                     Advena campbellii                           Campbell's keeled glass-snail  Critically Endangered  Presumed extinct               500                            Unknown   n/a
Mathewsoconcha grayi (Advena grayi)          Gray's glass-snail                          Critically Endangered          Unknown                5,000                          Unknown                        n/a
Mathewsoconcha phillipii (Advena phillipii)  Phillip Island glass-snail                  Critically Endangered          Presumed extinct       Presumed extinct               n/a                            n/a
Mathewsoconcha suteri (Advena suteri)        Suter's striped glass-snail                 Critically Endangered          Unknown                350                            Unknown                        n/a
Quintalia stoddartii (Advena stoddartii)     Stoddart's glass-snail                      Critically Endangered          Presumed extinct       Presumed extinct               n/a                            n/a
Reptiles                                     Christinus guentheri                        Lord Howe Island gecko         Vulnerable             176000                         176000                         Stable    Medium
Oligosoma lichenigerum                       Lord Howe Island skink                      Vulnerable                     Unknown                7000                           Stable b                       Low
Birds                                        Cyanoramphus cookii                         Norfolk Island green parrot    Endangered             240                            438 (270–606)                  Increase  Medium
Ninox novaeseelandiae undulata               Norfolk Island morepork, boobook owl        Endangered                     40                     25 (20–30)                     Decrease                       Medium
Pachycephala pectoralis xanthoprocta         Norfolk Island golden whistler, tamey       Vulnerable                     2300                   1671 (1372–1970)               Stable or decrease             Low
Petroica multicolor                          Norfolk Island robin                        Vulnerable                     800                    750 (700–800)                  Decrease                       Medium
Pterodroma neglecta neglecta                 Kermadec petrel (western)                   Vulnerable                     100                    150                            Increase                       High
Flora                                        Abutilon julianae                           Norfolk Island abutilon        Critically Endangered  43                             227                            Increase  Medium
Achyranthes arborescens                      Chaff tree, soft-wood                       Critically Endangered          109                    391                            Increase                       Medium
Achyranthes margaretarum                     Phillip Island chaffy tree                  Critically Endangered          20                     14                             Decrease                       High
Anthosachne kingiana kingiana                Phillip Island wheat grass                  Critically Endangered          50                     5                              Decrease                       High
Blechnum norfolkianum                        Norfolk Island water-fern                   Endangered                     708                    708                            Stable                         Medium
Boehmeria australis australis                Tree nettle, nettletree                     Critically Endangered          259                    591                            Increase                       Medium
Calystegia affinis                           A creeper                                   Critically Endangered          13                     28                             Increase                       Medium
Clematis dubia                               Clematis                                    Critically Endangered          53                     303                            Increase                       High
Coprosma baueri                              Coastal coprosma                            Endangered                     446                    708                            Increase                       Medium
Coprosma pilosa                              Mountain coprosma                           Endangered                     338                    420                            Increase                       Medium
Cordyline obtecta                            Ti                                          Vulnerable                     818                    1863                           Increase                       Medium
Dendrobium brachypus                         Norfolk Island orchid                       Endangered                     200                    20 (5-50)                      Unclear                        Low
Dysoxylum bijugum                            Sharkwood                                   Vulnerable                     870                    940                            Stable                         Medium
Elatostema montanum                          Mountain procris                            Critically Endangered          11                     26                             Increase                       Low
Euphorbia norfolkiana                        Norfolk Island euphorbia                    Critically Endangered          104                    388                            Increase                       High
Euphorbia obliqua                            A herb                                      Vulnerable                     530                    814                            Increase                       Low
Hibiscus insularis                           Phillip Island hibiscus                     Critically Endangered          100                    350                            Increase                       High
Hypolepis dicksonioides                      Downy ground-fern, brake fern, ground fern  Vulnerable                     500                    506                            Stable                         Medium
Ileostylus micranthus                        Mistletoe                                   Vulnerable                     500                    500                            Unclear                        Low
Lastreopsis calantha                         Shield-fern