LC
Enggano Scops-owl Otus enganensis



Taxonomy

Taxonomic note
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).

Taxonomic source(s)
Andrew, P. 1992. The Birds of Indonesia: A Checklist (Peters' Sequence). Indonesian Ornithological Society, Jakarta.
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.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2023 Least Concern
2016 Near Threatened B1ab(iii);C1+2a(ii)
2012 Near Threatened B1ab(iii);C1+2a(ii)
2008 Near Threatened B1a+b(iii); C1; C2a(ii)
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency low
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 540 km2 medium
Area of Occupancy (breeding/resident) 540 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 2500-9999 mature individuals poor suspected 2008
Population trend stable - suspected -
Generation length 2.76 years - - -
Number of subpopulations 1 - - -
Percentage of mature individuals in largest subpopulation 100% - - -

Population justification: This species is reportedly common in forest, edge and plantations within its range (Eaton et al. 2021, M. Iqbal in litt. 2023). However, with a range of not more than 540 km2, the population is very unlikely to exceed 10,000 mature individuals (which would require a density of 9-10 pairs/km2), and the population here is suspected to number 2,500-10,000 mature individuals, although this estimate is made speculatively and considered poor data quality.

Trend justification: Habitat loss is considered the only plausible threat to this species with no evidence the species is hunted (M. Iqbal in litt. 2023). However, remote sensing data indicate negligible (<1%) forest cover loss in its range over the last 10 years (Global Forest Watch 2023, based on data from Hansen et al. [2013] and methods disclosed therein). Moreover, the species is reportedly tolerant of habitat degradation and occurs even in plantations (Eaton et al. 2021), such that forest loss and disturbance cannot be assumed to directly impact population size. Its population is therefore suspected to be stable.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Indonesia extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Indonesia Pulau Enggano

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 0 - 280 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Future Minority (<50%) Slow, Significant Declines Low Impact: 3
Stresses
Ecosystem degradation
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Future Minority (<50%) Slow, Significant Declines Low Impact: 3
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2024) Species factsheet: Enggano Scops-owl Otus enganensis. Downloaded from https://datazone.birdlife.org/species/factsheet/enggano-scops-owl-otus-enganensis on 27/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 27/12/2024.