This species has been downlisted to Vulnerable on the basis that its habitat is not as fragmented as once thought, along with evidence that it is more widespread than previously thought. Nevertheless, its population is estimated to be small and inferred to be in on-going decline.
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.
Holt, D. W.; Berkley, R.; Deppe, C.; Enriquez Rocha, P. L.; Olsen, P. D.; Petersen, J. L.; Rangel Salazar, J. L.; Segars, K. P.; Wood, K. L. 1999. Strigidae (typical owls). In: del Hoyo, J.; Elliott, A.; Sargatal, J. (ed.), Handbook of the birds of the world, pp. 76-242. Lynx Edicions, Barcelona, Spain.
Otus magicus and O. tempestatis (del Hoyo and Collar 2014) were previously lumped as O. magicus, and O. alfredi, O. siaoensis, O. enganensis, O. insularis and O. beccarii (del Hoyo and Collar 2014) were split from O. magicus following Widodo et al. (1999), Lambert and Rasmussen (1998), Andrew (1992) and Holt et al. (1999). Prior to that all these taxa were lumped in O. magicus following Sibley and Monroe (1990, 1993).
25 cm. Tawny-brown owl with short, inconspicuous ear-tufts. Yellow eyes. Rather distinct, pale whitish eyebrows and facial disc. Densely barred brown upperparts with some white on scapulars. Brown or rich rufous underparts, probably colour morphs but possibly sex dimorphism, with very fine barring. Similar spp. The only owl on Biak-Supiori. Papuan Frogmouth Podargus papuensis and Large-tailed Nightjar Caprimulgus macrurus have different habits and long tails. Voice Probably a harsh croak, rasping at close range but sounding more like a deer's bark at long range. Hints Calling birds can usually be stalked and seen in the beam of a torch.
Bishop, K. D. 1982. Endemic birds of Biak Island.
Eastwood, C. 1996. A trip to Irian Jaya. Muruk 8(1): 12-23.
Gibbs, D. 1993. Irian Jaya, Indonesia, 21 January--12 March 1991: a site guide for birdwatchers, with brief notes from 1992.
IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.1). Available at: http://www.iucnredlist.org. (Accessed: 19 June 2012).
König, C.; Weick, F.; Becking, J.-H. 1999. Owls: a guide to the owls of the world. Pica Press, Robertsbridge, U.K.
Marks, J. S.; Cannings, R. J.; Mikkola, H. 1999. Family Strigidae (Typical Owls). In: del Hoyo, J.; Elliott, A.; Sargatal, J. (ed.), Handbook of the birds of the world, pp. 76-242. Lynx Edicions, Barcelona, Spain.
Marshall, J. T. 1978. Systematics of smaller Asian night birds based on voice. American Ornithologists' Union, Kansas.
Mayr, E.; Meyer de Schauensee, R. 1939. Zoological results of the Denison-Crockett Expedition to the south Pacific for the Academy of Natural Sciences of Philadelphia, 1937-1938. Part 1: the birds of the Island of Biak. Proceedings of the Academy of Natural Sciences of Philadelphia 91: 1-37.
Poulsen, B. O.; Frolander, A. 1994. Birding Irian Jaya, Indonesian New Guinea.
Sujatnika; Jepson, P.; Soehartono, T. R.; Crosby, M. J.; Mardiastuti, A. 1995. Conserving Indonesian biodiversity: the Endemic Bird Area approach. BirdLife International Indonesia Programme, Bogor.
Further web sources of information
Detailed species accounts from the Threatened birds of Asia: the BirdLife International Red Data Book (BirdLife International 2001).
Text account compilers
Allinson, T, Benstead, P., Bird, J., Dutson, G., Symes, A. & Taylor, J.
Beehler, B., Bishop, K., Dutson, G., Holmes, D., Ripley, S., van Balen, B. & van Beirs, M.
BirdLife International (2015) Species factsheet: Otus beccarii. Downloaded from http://www.birdlife.org on 29/08/2015. Recommended citation for factsheets for more than one species: BirdLife International (2015) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/08/2015.
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
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|Current IUCN Red List category||Vulnerable|
|Family||Strigidae (Typical Owls)|
|Species name author||(Salvadori, 1876)|
|Population size||2500-9999 mature individuals|
|Distribution size (breeding/resident)||-|
|Links to further information|
|- Additional Information on this species|