Uroglaux dimorpha 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Strigiformes Strigidae

Scientific Name: Uroglaux dimorpha (Salvadori, 1874)
Common Name(s):
English Papuan Hawk-owl, 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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2017
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Beehler, B., Bishop, K.D., Gregory, P. & Leary, T.
Facilitator/Compiler(s): Derhé, M., Dutson, G., Symes, A., Wheatley, H.
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:

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
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:821000
Continuing decline in extent of occurrence (EOO):UnknownExtreme 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:UnknownContinuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll 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).

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.

Amended [top]

Amended reason: EOO updated.

Citation: BirdLife International. 2017. Uroglaux dimorpha. (amended version published in 2016) The IUCN Red List of Threatened Species 2017: e.T22689490A113058928. . Downloaded on 19 November 2017.
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