CR
Siau Scops-owl Otus siaoensis



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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 and habitat destruction has been extensive and is continuing. However, it cannot be assumed to be Extinct, because there have been some local reports, a thorough survey is required, and some Asian scops-owls survive even in secondary habitats. Any remaining population is likely to be tiny, and for these reasons it is treated as Critically Endangered.

Population size: 1-49 mature individuals

Population trend: Unknown

Distribution size (breeding/resident): 120 km2

Country endemic: Yes

Attributes
Land-mass type - oceanic island - Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally they have never been connected to a continental area by a land-ridge, and are volcanic in origin.
Realm - Oceanic - realm
IUCN Ecosystem -- Terrestrial biome

Recommended citation
BirdLife International (2016) Species factsheet: Otus siaoensis. Downloaded from http://www.birdlife.org on 06/12/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 06/12/2016.