VU
Philippine Eagle-owl Bubo philippensis



Taxonomy

Taxonomic source(s)
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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - A2c+3c+4c;C2a(i)

Red List history
Year Category Criteria
2016 Vulnerable A2c+3c+4c;C2a(i)
2013 Vulnerable A2c+3c+4c;C2a(i)
2012 Vulnerable A2c+3c+4c;C2a(i)
2008 Vulnerable A2c; A3c; A4c; C2a(i)
2004 Vulnerable
2000 Vulnerable
1996 Endangered
1994 Endangered
1988 Near Threatened
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - shelf island
Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 631,000 medium
Number of locations 11-100 -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 2500-9999 poor estimated 1999
Population trend Decreasing poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 30-49 - - -
Decline (10 years/3 generation past and future) 30-49 - - -
Number of subpopulations 2-100 - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 11.6 - - -

Population justification: The population size is preliminarily estimated to fall into the band 2,500-9,999 mature individuals. This equates to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals.

Trend justification: Owing to this species' requirement for lowland forest it is suspected to have declined rapidly as forests have been widely cleared within its range. However, it can persist in some modified habitats; thus further research is required to compare population densities in different habitats, and to calculate more accurate rates of deforestation.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Philippines N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Philippines Kalbario-Patapat National Park
Philippines Mount Pulag National Park
Philippines Bataan Natural Park and Subic Bay Forest Reserve
Philippines Mounts Palay-Palay-Mataas Na Gulod National Park
Philippines Peñablanca Protected Landscape and Seascape
Philippines Northern Sierra Madre Natural Park
Philippines Mount Dingalan
Philippines Angat watershed
Philippines Mount Makiling
Philippines University of the Philippines Land Grants (Pakil and Real)
Philippines Mounts Banahaw-San Cristobal National Park
Philippines Quezon National Park
Philippines Catanduanes Watershed Forest Reserve
Philippines Bulusan Volcano Natural Park
Philippines Mount Cabalantian - Mount Capoto-an complex
Philippines Anonang-Lobi Range
Philippines Mount Nacolod
Philippines Rajah Sikatuna Protected Landscape
Philippines Mount Hilong-hilong
Philippines Mount Hamiguitan (Tumadgo peak)
Philippines Mount Kaluayan - Mount Kinabalian Complex
Philippines Mount Kitanglad
Philippines Mount Apo
Philippines Mounts Irid-Angilo and Binuang
Philippines Mount Guiting-guiting Natural Park
Philippines North Eastern Cagayan Protected Landscape and Seascape
Philippines Samar Island Natural Park
Philippines North Central Sierra Madre Mountains

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 0 - 650 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Livestock farming & ranching - Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Ecosystem degradation
Climate change & severe weather Storms & flooding Timing Scope Severity Impact
Past, Likely to Return Whole (>90%) Negligible declines Past Impact
Stresses
Ecosystem degradation
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Geological events Avalanches/landslides Timing Scope Severity Impact
Past, Likely to Return Minority (<50%) Rapid Declines Past Impact
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2022) Species factsheet: Bubo philippensis. Downloaded from http://www.birdlife.org on 01/10/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 01/10/2022.