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). The population trend appears to be increasing, and hence the species does not 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 reported to be common in the western highlands but very local and scarce elsewhere on New Guinea (Beehler et al. 1986, Coates 1990). This population is estimated to be increasing in line with a range expansion into cultivated areas in New Guinea (del Hoyo et al. 2007).
Trend justification
This population is estimated to be increasing in line with a range expansion into cultivated areas in New Guinea (del Hoyo et al. 2007).
Text account compilers
Rutherford, C.A.
Recommended citation
BirdLife International (2024) Species factsheet: Black-headed Whistler Pachycephala monacha. Downloaded from
https://datazone.birdlife.org/species/factsheet/black-headed-whistler-pachycephala-monacha 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.