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Chestnut-shouldered Goshawk Erythrotriorchis buergersi

Justification
This rare and little-known species, endemic to New Guinea, is known only from a handful of records. There is no information on its likely distribution extent, population size or trends, although there are unlikely to be intense threats within its distribution. For these reasons, it is classified as Data Deficient.

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

Distribution and population
Erythrotriorchis buergersi is a rare and little-known species, endemic to New Guinea (Papua, formerly Irian Jaya, Indonesia and Papua New Guinea). It is known only from a handful of records, none in the last ten years, all from eastern New Guinea except for a single record from the Foya Mountains in Papua (Pratt 1982, Coates 1985, Diamond 1985, Beehler et al. 1986, K. D. Bishop in litt. 1999, P. Gregory in litt. 1999). Although it is likely to be overlooked, it does soar (Diamond 1985, I. Burrows in litt. 1994) and appears to occur at very low population densities.

Population justification
The global population size has not been quantified, but the species is described as rare (Ferguson-Lees and Christie 2001).

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

Ecology
Hill and lower mountain forest, probably generally lower than Accipiter meyerianus, at 450-1,580 m.

Threats
Most of its habitat is unsuitable for logging and it is unlikely to be hunted (B. Finch in litt. 1994), however its status cannot be assessed from the present few records.

Conservation Actions Underway
CITES Appendix II. Conservation Actions Proposed
Search for the species in potentially suitable mountain forest in New Guinea. Study its ecological requirements and threats.

References
Beehler, B. M.; Pratt, T. K.; Zimmerman, D. A. 1986. Birds of New Guinea. Princeton University Press, Princeton.

Coates, B. J. 1985. The birds of Papua New Guinea, 1: non-passerines. Dove, Alderley, Australia.

Diamond, J. M. 1985. New distributional records and taxa from the outlying mountain ranges of New Guinea. Emu 85: 65-91.

Ferguson-Lees, J.; Christie, D. A. 2001. Raptors of the world. Christopher Helm, London.

Pratt, T. K. 1982. Additions to the avifauna of the Adelbert range, Papua New Guinea. Emu 82: 117-125.

Further web sources of information
Detailed species accounts from the Threatened birds of Asia: the BirdLife International Red Data Book (BirdLife International 2001).

Explore HBW Alive for further information on this species

Search for photos and videos, and hear sounds of this species from the Internet Bird Collection

Text account compilers
Derhé, M., Dutson, G., Symes, A.

Contributors
Bishop, K., Burrows, I., Finch, B., Gregory, P.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2014) Species factsheet: Erythrotriorchis buergersi. Downloaded from http://www.birdlife.org on 30/08/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 30/08/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Data Deficient
Family Accipitridae (Hawks, Eagles)
Species name author (Reichenow, 1914)
Population size Unknown mature individuals
Population trend Stable
Distribution size (breeding/resident) 152,000 km2
Country endemic? No
Links to further information
- Additional Information on this species