Data Zone
Justification of Red List category
This species has a moderately small range, within which it is now scarce and probably in decline owing to habitat loss. It is therefore likely to have a moderately small population. It is currently considered Near Threatened, but further studies are urgently needed to clarify the magnitude of threats facing remaining populations.
Population justification
The global population size has not been quantified, but the species is described as fairly uncommon (del Hoyo et al. 2005).
Trend justification
This species was historically described as common within its small range, but recent surveys suggest it is now scarce or uncommon. It is likely to have declined as a result of habitat loss and degradation.
This species is endemic to Mindanao, Philippines, where it is known from around Lake Lanao and the Zamboanga Peninsula, plus Basilan including Malamaui (Collar et al. 1999). Although previously described as common in forest and forest edge, recent searches have produced very few sightings, including an almost fruitless search in the Zamboango City watershed. This suggests that it is now uncommon within its restricted range. It appears to be restricted to primary forest or secondary forest with tall trees and is therefore likely to have declined (R. Hutchinson in litt. 2012).
This species occurs in forest and forest edge, and is apparently commonest in intact areas of primary forest.
Habitat destruction in the Philippines is occurring on a large scale, particularly in the lowlands, as a result of logging and forest clearance for agriculture.
Conservation Actions Underway
No targeted conservation actions are known for this species, although some of its habitat is protected.
Conservation Actions Proposed
There is an urgent need to conduct surveys within the species's range to assess population trends and rates of habitat loss. Conduct ecological studies to improve understanding of its precise habitat requirements, tolerance of secondary habitats and response to fragmentation. Campaign for the establishment of a protected area on the Zamboanga Peninsula, Mindanao.
Text account compilers
Benstead, P., Allinson, T, Gilroy, J., Taylor, J.
Contributors
Hutchinson, R.
Recommended citation
BirdLife International (2024) Species factsheet: Zamboanga Bulbul Hypsipetes rufigularis. Downloaded from
https://datazone.birdlife.org/species/factsheet/zamboanga-bulbul-hypsipetes-rufigularis on 22/11/2024.
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 22/11/2024.