CR
Siau Scops-owl Otus siaoensis



Family: Strigidae (Typical Owls)

Authority: (Schlegel, 1873)

Red List Category

Criteria: D

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Justification of Red List category
This species has not been recorded since the type specimen was collected in 1866, and it was not found during recent surveys since 1998. Very little forest remains within its presumed range and habitat destruction has been extensive and is continuing. However, it cannot be assumed to be Extinct, because there have been some local reports including a recent video that may be of the species, and some Asian scops-owls survive even in degraded habitats. Thus, thorough surveys are required. Any remaining population is likely to be tiny, and for these reasons it is treated as Critically Endangered.



Population size: 1-49

Population trend: Stable

Extent of occurrence (breeding/resident): 160 km2

Country endemic: Yes

Attributes
Land-mass type - oceanic island
Realm - Oceanic
IUCN Ecosystem -- Terrestrial biome

Recommended citation
BirdLife International (2019) Species factsheet: Otus siaoensis. Downloaded from http://www.birdlife.org on 20/05/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/05/2019.