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 <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 trend is suspected to be declining but the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, and hence it does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Population justification
The population size has not been quantified, but the species is described as common in primary and secondary forest (Eaton et al. 2021).
Trend justification
There are no data on population trends, however the species is suspected to be in slow decline in line with ongoing forest loss within its range. Remote sensing data indicate that forest loss within the range is occurring at a rate equivalent to c.6% in three generations (Global Forest Watch 2023, using data from Hansen et al. [2013] and methods disclosed therein). Declines are unlikely to exceed the rate of tree cover loss - the species is tolerant of some degradation and is occasionally found in plantations, and its occurrence on high peaks may buffer it from lowland forest loss to some extent (Kirwan and Boesman 2021). Hunting may affect the species locally, but is not considered to be driving population-level declines (Kirwan and Boesman 2021). Tentatively, the rate of decline is placed in the range 1-9% in three generations.
The species is confined to the island of Timor (comprising West Timor, Indonesia, and Timor-Leste).
The species inhabits primary and secondary forest, and occasionally plantations (Eaton et al. 2021).
This species is likely affected by ongoing forest loss within its range (per Global Forest Watch 2023). Hunting may affect the species locally, but is not considered to be driving population-level declines (Kirwan and Boesman 2021).
Text account compilers
Vine, J.
Recommended citation
BirdLife International (2024) Species factsheet: Timor Boobook Ninox fusca. Downloaded from
https://datazone.birdlife.org/species/factsheet/timor-boobook-ninox-fusca on 26/12/2024.
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 26/12/2024.