Ninox odiosa 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Strigiformes Strigidae

Scientific Name: Ninox odiosa
Species Authority: Sclater, 1877
Common Name(s):
English New Britain Boobook, Russet Hawk-Owl, Spangled Boobook
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. Lynx Edicions BirdLife International.
Identification information: 22cm. A small Hawk-owl with fine spotted chocolate-brown upperparts. Underparts are paler mottled white and brown. Conspicuous white eyebrows and throat patch give distinctive facial appearance. Similar spp. Bismark Hawk-owl (N. variegata) is similar but larger and no obvious eyebrows. Voice: A rapidly repeated monosyllabic "whoo", typically starting low then rising in pitch, becoming faster and louder.

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2c+3c+4c ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Beehler, B., Bishop, K., Dutson, G. & Wilkinson, R.
Facilitator/Compiler(s): Butchart, S., Derhé, M., Ekstrom, J., Mahood, S.
This speciesis classified as Vulnerable because remote-sensing data indicate that there has been a dramatic loss of lowland forest across its range and that it is therefore likely to be undergoing a rapid population decline.

Previously published Red List assessments:
2008 Vulnerable (VU)
2004 Least Concern (LC)
2000 Lower Risk/least concern (LR/lc)
1994 Lower Risk/least concern (LR/lc)
1988 Lower Risk/least concern (LR/lc)

Geographic Range [top]

Range Description: Ninox odiosa is endemic to the island of New Britain Papua New Guinea where although it is rather poorly known, it appears to be not uncommon in suitable habitat. It is suspected to have declined rapidly in recent years owing to ongoing clearance of lowland forest (Buchanan et al. 2008).

Countries occurrence:
Papua New Guinea
Continuing decline in area of occupancy (AOO): Unknown
Extreme fluctuations in area of occupancy (AOO): No
Estimated extent of occurrence (EOO) - km2: 28300
Continuing decline in extent of occurrence (EOO): Unknown
Extreme fluctuations in extent of occurrence (EOO): No
Continuing decline in number of locations: Unknown
Extreme fluctuations in the number of locations: No
Upper elevation limit (metres): 1200
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The population is estimated to be in the band 10,000-19,999 mature individuals, equating to 15,000-29,999 individuals in total, rounded here to 15,000-30,000 individuals.

Trend Justification:  Buchanan et al. (2008) calculated the rate of forest loss within the species's range on New Britain as 33.8% over three generations. Hence, this decline is expected to continue.
Current Population Trend: Decreasing
Additional data:
Number of mature individuals: 10000-19999 Continuing decline of mature individuals: Yes
Extreme fluctuations: No Population severely fragmented: No
Continuing decline in subpopulations: Unknown
Extreme fluctuations in subpopulations: No All individuals in one subpopulation: No

Habitat and Ecology [top]

Habitat and Ecology: It inhabits lowland rainforest up to 1,200 m. It is thought to tolerate some degree of habitat degradation.

Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes
Generation Length (years): 10
Movement patterns: Not a Migrant

Threats [top]

Major Threat(s): Lowland forest clearance on New Britain for conversion to oil palm plantations has been intense in recent decades and the island accounts for approximately half of Papua New Guinea's timber exports (Buchanan et al. 2008). Over 30% of suitable habitat has been cleared in the last 10 years and this trend is ongoing (Buchanan et al. 2008).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
None is known.

Conservation Actions Proposed
Identify and effectively protect a network of reserves, including some containing large areas of unlogged lowland forest, on New Britain. Continue to monitor trends in forest loss. Research its tolerance of degraded forest. Monitor populations in a number of primary forest and degraded forest sites across the island.

Citation: BirdLife International. 2012. Ninox odiosa. The IUCN Red List of Threatened Species 2012: e.T22689480A38247660. . Downloaded on 02 December 2015.
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