Data-deficient species (not listed under the Biodiversity Conservation Act 2016)

Data-deficient species in NSW: are these species threatened?

The NSW Threatened Species Scientific Committee assesses the risk of extinction of species using criteria that are modelled on the International Union for the Conservation of Nature (IUCN) Red List categories and criteria. Sometimes the Committee is unable to complete an assessment due to a lack of information.

A species may be identified as data-deficient when there is inadequate information to make a direct, or indirect, assessment of its risk of extinction based on its distribution and/or population status. A taxon in this category may be well studied, and its biology well known, but appropriate data on abundance and/or distribution are lacking.

Data-deficient does not mean that a species is not of conservation concern. The assessment of taxa in this category indicates that more information is required and acknowledges the possibility that future research will show that a threatened classification is appropriate.

The conservation assessment reports listed below highlight the lack of available information on these species and the information gaps to be targeted to complete an IUCN assessment.

In this table the current reported locations for these species are shown, however, due to the limited information available, it is possible that some species may be found in suitable habitat in other areas of NSW or Australia.




Common name

Reported location in NSW

Chalcites osculans

Black-eared Cuckoo (PDF 1 MB)

West of the Great Dividing Range



Common name

Reported location in NSW

Egernia saxatilis saxatilis

Warrumbungles Black Rock Skink (PDF 205KB)

Coonabarabran (Warrumbungle Ranges)


Anilios batillus

Shovel-snouted Blind Snake (PDF 198KB)

Possibly Wagga Wagga area

Karma tryoni
Tryon's skink (PDF 165KB)
McPhersons Range on the Queensland–NSW border
Saltuarius kateae
Kate’s Leaf-tailed Gecko, Mount Marsh Leaf-tailed Gecko and Upper Clarence Leaf-tailed Gecko (PDF 162KB)
The eastern side of the Clarence River
Saproscincus oriarus Heath Shadeskink, Heath Shade-skink and Coastal Shadeskink (PDF 164KB)
Myall Lakes area



Common name

Reported location in NSW

Persoonia oxycoccoides

Persoonia oxycoccoides (PDF 1.2MB)

Between Tallong, Carrington Falls and Hampton – refer to the map in the report