Uroglaux dimorpha 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Strigiformes Strigidae

Scientific Name: Uroglaux dimorpha
Species Authority: (Salvadori, 1874)
Common Name(s):
English Papuan Boobook, Papuan Hawk-Owl
Spanish Búho Aguilucho de Neuva Guinea, Nínox Halcón
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.

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Symes, A. & Butchart, S.
Contributor(s): Beehler, B., Bishop, K., Gregory, P. & Leary, T.
Facilitator/Compiler(s): Derhé, M., Dutson, G., Symes, A.
This species is known only from few localities in New Guinea, with the only records being from nine sites in the 1980s and 1990s. The  population size is unknown and it is described as apparently very scarce or rare. There is no information on its likely distribution extent, population trends, or threats, although it is potentially threatened by logging of lowland forests. For these reasons, it is classified as Data Deficient.
Previously published Red List assessments:
2008 Data Deficient (DD)
2004 Data Deficient (DD)
2000 Data Deficient (DD)
1996 Data Deficient (DD)
1994 Data Deficient (DD)
1988 Lower Risk/least concern (LR/lc)

Geographic Range [top]

Range Description: Uroglaux dimorpha is sparsely distributed in New Guinea (Papua, formerly Irian Jaya, Indonesia and Papua New Guinea), known only from few localities in the north-west, including Yapen island, near Vanimo and Lae, the south-east and Gulf Province (Coates 1985, Beehler et al. 1986, Lamonthe 1993). There are only records from nine sites in the 1980s and 1990s, including a series of birds captured near Lae (Hicks 1988, Lamonthe 1993, Shany 1995, K. D. Bishop in litt. 1999, P. Gregory in litt. 1999, T. Leary in litt. 2000, C. Makamet per B. Beehler in litt. 2000).

Countries occurrence:
Indonesia; 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: 181000
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): 1500
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The global population size has not been quantified, but the species is described as apparently very scarce or rare (Konig et al. 1999).

Trend Justification:  The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
Current Population Trend: Stable
Additional data:
Number of mature individuals: Unknown Continuing decline of mature individuals: Unknown
Extreme fluctuations: No Population severely fragmented: No
Continuing decline in subpopulations: Unknown
Extreme fluctuations in subpopulations: No All individuals in one subpopulation: No
No. of individuals in largest subpopulation: 100

Habitat and Ecology [top]

Habitat and Ecology: It is a lowland forest species, occasionally recorded to 1,500 m, and is also found in gallery forest in savannah (Coates 1985).

Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Unknown
Generation Length (years): 5.4
Movement patterns: Not a Migrant

Threats [top]

Major Threat(s): Its tolerance of degraded habitat is unknown and it is potentially threatened by logging of lowland forests.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
CITES Appendix II.

Conservation Actions Proposed
Survey historical locations and potentially suitable habitats for the species. Study its ecological requirements, tolerance of habitat degradation and threats.

Citation: BirdLife International. 2012. Uroglaux dimorpha. The IUCN Red List of Threatened Species 2012: e.T22689490A38248579. . Downloaded on 25 November 2015.
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