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 moderately common and widespread (del Hoyo et al. 2005). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 4.4% within its mapped range over the past three generations (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). It is therefore tentatively suspected that this rate of cover loss may have led to a decline of between 1-19% in the species' population size over the same time frame, with a best estimate of reduction being less than 5%.
Trend justification
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This species is endemic Borneo, Indonesia and Malaysia.
This species is found in forest from sea level to 2,400 m altitude, occasionally to 2,700 m on Mount Kinabalu (Clement and Hathway 2000, Collar 2004). It is most often found along gullies and streams (Collar 2004).
This species is threatened by ongoing habitat destruction and fragmentation.
Text account compilers
Rutherford, C.A.
Recommended citation
BirdLife International (2024) Species factsheet: Bornean Whistling-thrush Myophonus borneensis. Downloaded from
https://datazone.birdlife.org/species/factsheet/bornean-whistling-thrush-myophonus-borneensis on 23/11/2024.
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 23/11/2024.