Data Zone
Justification of Red List category
Although this species may have a restricted range, it is not believed to 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 uncommon to common throughout Palawan (Collar et al. 1999, del Hoyo et al. 2006, R. Hutchinson in litt. 2013). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 13.7% within its mapped range over the past 10 years (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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Terpsiphone cyanescens is endemic to the Palawan group (Palawan, Busuanga, Culion and Bantac), Philippines, and appears to be uncommon to common throughout Palawan (Collar et al. 1999, del Hoyo et al. 2006, R. Hutchinson in litt. 2013).
This species is found mostly in lower-lying areas, occupying primary forest and modified habitats. Surveys in Puerto Princesa Subterranean River National Park recorded the species in early and advanced secondary growth and habitats within agricultural areas (Mallari et al. 2011).
This species is threatened by the conversion of both primary and secondary habitats (R. Hutchinson in litt. 2013), which is occurring at an increasing rate within its range as a result of logging and agricultural development. However, its tolerance of modified habitats suggests that the level of threat is limited.
Conservation Actions Underway
No targeted conservation actions are known for this species, although some of its habitat is protected.
Conservation Actions Proposed
Conduct repeated surveys within the species's range to determine current distribution and abundance, as well as assess population trends and rates of habitat loss. Campaign for the long-term protection of remaining tracts of lowland forest on Palawan.
Text account compilers
Rutherford, C.A.
Contributors
Hutchinson, R.
Recommended citation
BirdLife International (2024) Species factsheet: Blue Paradise-flycatcher Terpsiphone cyanescens. Downloaded from
https://datazone.birdlife.org/species/factsheet/blue-paradise-flycatcher-terpsiphone-cyanescens on 23/12/2024.
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 23/12/2024.