Otus siaoensis (Schlegel, 1873)
Siau scops owl, Siau scops-owl
Taxonomy & Nomenclature
Conservation Status
Missing
Last record: 1866 (Martin et al., 2023)
IUCN RedList status: Critically Endangered
Beyond the holotype, only one possible record of this species has been made, in 2009 when an "owl-like" call was recorded. However, (Kelly et al. 2017) reported a Tyto sp. from the island, thus possibly explaining the previous call.
Distribution
Siau Island, Indonesia
Biology & Ecology
Hypodigm
Known only from the holotype.
Media
References
Original scientific description:
(Schlegel) 1873 Mus.Hist.Pays-BasRev.Meth.Crit.Coll. livr.10 no.36 AvesNoctuae p.13
Other references:
BirdLife International. (2000). Threatened Birds of the World. Lynx Edicions and BirdLife International, Barcelona and Cambridge.
BirdLife International. (2014). Species factsheet: Otus siaoensis. Downloaded from http://www.birdlife.org on 26/11/2014.
BirdLife International. (2016). Otus siaoensis. The IUCN Red List of Threatened Species 2016: e.T22728599A94991495. http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22728599A94991495.en. Downloaded on 04 November 2017.
Butchart, S. H. M.; Collar, N. J.; Crosby, M. J. & Tobias, J. A. (2005). Asian enigmas: "Lost" and poorly known birds: targets for birders in Asia. Birding Asia 3: 41-49.
Butchart, Stuart H. M., Lowe, Stephen, Martin, Rob W., Symes, Andy, Westrip, James R. S. and Wheatley, Hannah. (2018a). Which bird species have gone extinct? A novel quantitative classification approach. Biological Conservation 227: 9-18. https://doi.org/10.1016/j.biocon.2018.08.014
Butchart, Stuart H. M., Stattersfield, A. J. and Brooks, T. M. (2006). Going or gone: defining ‘Possibly Extinct’ species to give a truer picture of recent extinctions. Bulletin of the British Ornithologists' Club 126A: 7-24.
Butchart, Stuart H. M., Wheatley, Hannah, Lowe, Stephen, Westrip, James R. S., Symes, Andy and Martin, Rob W. (2018b). Data for: Which bird species have gone extinct? A novel quantitative classification approach. Mendeley Data, V1, doi: 10.17632/vvjhpmyxb4.1
Collar, Nigel J. and Sykes, Brian R. (2009). Lost, found and saved—OBC conservation: the next 25 years. BirdingASIA 11: 41-46.
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.
Hunowi, I. (2006). Ghost birds of Sulawesi: surveys and conservation of nightjars and owls. BirdingASIA 6: 7-8.
Joseph Kelly, Arief Rahman, Ingo Grass, Johny S. Tasirin and Matthias Waltert. (2017). Avifaunal status updates, range extensions and potential new taxa on the lesser Sangihe and Talaud islands, Indonesia. Raffles Bulletin of Zoology 65: 482-496.
Lambert, F. R. and Rasmussen, P. C. (1998). A new scops owl from Sangihe Island, Indonesia. Bulletin of the British Ornithologists' Club 118: 204-217.
Martin, Thomas E., Bennett, Gareth C., Fairbairn, Andrew J. and Mooers, A. Ø. (2023). ‘Lost’ taxa and their conservation implications. Animal Conservation 26(1): 14-24. https://doi.org/10.1111/acv.12788 [Appendix S2 (1617 taxa not seen >10 years); Appendix S3 (562 taxa not seen >50 years)]
Riley, J. (1997). The birds of Sangihe and Talaud, North Sulawesi. Kukila, 9: 3-37.
Tyrberg, Tommy. (2009). Holocene avian extinctions, pp. 63-106. In: Turvey, Samuel T. (ed.). Holocene Extinctions. Oxford, UK & New York, USA: Oxford University Press. xii + 352 pp.
http://birdbase.hokkaido-ies.go.jp/rdb/rdb_en/otussiao.pdf