• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note
Ninox novaeseelandiae, N. leucopsis and N. boobook (del Hoyo and Collar 2014) were previously lumped as N. novaeseelandiae following Christidis and Boles (1994). Prior to that Ninox novaeseelandiae and N. boobook had been split following Sibley and Monroe (1990, 1993). Formerly treated as a subspecies of N. boobook (which see) or, on molecular basis, of N. novaeseelandiae, but recently treated as a separate species (Dickinson and Remsen 2013, König and Weick 2008), on basis of “DNA evidence…allopatric distribution…and some external similarity to its Australian counterpart”. In fact, is notably different from N. boobook sensu lato by virtue of smaller size (allow 2), much darker, richer brown coloration (2), more extensive spotting above, much more spotting vs streaking below (2) and different voice (allow 3); differs from similarly (but perhaps not identically) voiced N. novaeseelandiae in its larger size (effect size for male wing, based on published data (Higgins 1999), 3.75; score 2), albeit with same-length tail (allow 1), paler brown coloration which shades paler on lower underparts so that undertail-coverts whitish where New Zealand birds rusty-buff (2), more spotting on head and neck (1), whiter spotting below (1), and feet pinkish-grey (Higgins 1999) vs buffy yellow to orange-buff (ns1). Monotypic.

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2024	Least Concern
2016	Least Concern
2014	Least Concern
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	low
Land-mass type		Average mass	164 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	139,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	-	suspected	-
Generation length	5.2 years	-	-	-

Population justification: The global population size has not been quantified, but the species is described as widespread and common (del Hoyo et al. 1999). The population is suspected to be stable in the absence of evidence for any declines or substantial threats.

Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Australia	extant	native	yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	suitable	resident
Artificial/Terrestrial	Rural Gardens	suitable	resident
Artificial/Terrestrial	Urban Areas	suitable	resident
Forest	Temperate	suitable	resident
Shrubland	Temperate	suitable	resident
Altitude	800 - 2300 m	Occasional altitudinal limits

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Tasmanian Boobook Ninox leucopsis. Downloaded from https://datazone.birdlife.org/species/factsheet/tasmanian-boobook-ninox-leucopsis on 22/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 22/12/2024.