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

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
-	-	A2c

Red List history

Year	Category	Criteria
2018	Vulnerable	A2c
2016	Vulnerable	A2c
2012	Vulnerable	A2c+3c+4c
2008	Vulnerable	A2c; A3c; A4c
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Migratory status	not a migrant	Forest dependency	medium
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	64,200 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	10000-19999 mature individuals	poor	inferred	2000
Population trend	decreasing	poor	estimated	1978-2008
Rate of change over the past 10 years/3 generations (longer of the two periods)	30-49%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Generation length	10 years	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: This species is widespread and relatively common for a small owl. The population is estimated to be in the band 10,000-19,999 mature individuals in a single subpopulation.

Trend justification: Buchanan et al. (2008) calculated the rate of forest loss within the species's range on New Britain as 34% over three generations (30 years). Less detailed analysis is available for later years but about 2.2% of forest was lost plus 5.2% degraded across New Britain between 2002 and 2014 (Bryan and Shearman 2015). It is inferred that forest loss and degradation has slowed. The species is moderately tolerant of degraded habitat and its current and future rate of decline is precautionary estimated to be 10-19% over three generations.

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	possible	resident
Artificial/Terrestrial	Pastureland	possible	resident
Artificial/Terrestrial	Plantations	possible	resident
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	possible	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 1200 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Past, Likely to Return		Minority (<50%)		Rapid Declines		Past Impact
		Stresses Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Shifting agriculture	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation

---

Recommended citation
BirdLife International (2024) Species factsheet: New Britain Boobook Ninox odiosa. Downloaded from https://datazone.birdlife.org/species/factsheet/new-britain-boobook-ninox-odiosa on 23/11/2024.
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 23/11/2024.