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There are very few records of this species, which is classified as Endangered on the basis of its very small range and apparent restriction to tall lowland forest, which is severely fragmented and declining. However, it may prove to be more common and widespread, which could justify its reclassification as Vulnerable.
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
Otus magicus (Sibley and Monroe 1990, 1993) has been split into O. alfredi following Widodo et al. (1999), O. siaoensis following Lambert and Rasmussen (1998), O. enganensis following Andrew (1992), O. insularis and O. beccarii following Holt et al. (1999) and O. magicus (with species limits accordingly revised). O. beccarii was treated as a separate species in Collar and Andrew (1988), as a subspecies of O. magicus in Collar et al. (1994) and as a separate species in BirdLife International (2000) and subsequently.
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.
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
Benstead, P., Bird, J., Dutson, G., Taylor, J., Allinson, T
Bishop, K., Holmes, D., Ripley, S., van Balen, B., van Beirs, M.
IUCN Red List evaluators
Butchart, S., Symes, A.
BirdLife International (2014) Species factsheet: Otus beccarii. Downloaded from http://www.birdlife.org on 23/07/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/07/2014.
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.
|Current IUCN Red List category||Endangered|
|Species name author||(Salvadori, 1876)|
|Population size||2500-9999 mature individuals|
|Distribution size (breeding/resident)||2,500 km2|
|Links to further information|
|- Additional Information on this species|