Data Zone
Justification of Red List category
This species has a large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence under 20,000 km² combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (under 10,000 mature individuals with a continuing decline estimated to be over 10% in ten years or three generations, or with a specified population structure). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (over 30% decline over ten years or three generations). For these reasons the species is evaluated as Least Concern.
Population justification
The global population size has not been quantified, but the species is described as locally common (Konig et al. 1999). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 4.5% within its mapped range over the past three generations (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Therefore, as a precautionary measure, it is tentatively suspected that this loss of cover may have led to a decline of between 1-19% in the species' population size over the same time frame.
Trend justification
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N. philippensis occurs widely throughout the central and northern islands of the Philippines, where it is known from Biliran, Bohol, Boracay, Buad, Carabao, Catanduanes, Guimaras, Leyte, Lubang, Luzon, Marinduque, Masbate, Negros, Panay, Polillo Samar, Semirara, Siquijor and Ticao (Rasmussen et al. 2012).
Occurs in primary and secondary forest, including remnant patches and at edges (Kennedy et al. 2000, del Hoyo et al. 1999).
15-20cm. A small hawk-owl, with small but obvious whitish supercilia, and dark streaked underparts lacking barring. This species shares long, obvious filamentous 'whiskers' with N. spilocephala, from which it differs in voice and in the unmarked crown, spotted in N. spilocephala. Similar species. The other Ninox formerly included with the present species have barring or spots on the crown, have much shorter 'whiskers' and most have barring below.
Text account compilers
Rutherford, C.A.
Recommended citation
BirdLife International (2024) Species factsheet: Luzon Boobook Ninox philippensis. Downloaded from
https://datazone.birdlife.org/species/factsheet/luzon-boobook-ninox-philippensis on 22/12/2024.
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 22/12/2024.