Current view: Data table and detailed info
Taxonomic note
Phylloscopus poliocephalus and P. makirensis (Sibley & Monroe [1990, 1993]) have been lumped and subsequently split into P. poliocephalus, P. misoriensis and P. maforensis following del Hoyo and Collar (2016).
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
IUCN Red List criteria met and history
Red List criteria met
Red List history
Migratory status |
not a migrant |
Forest dependency |
medium |
Land-mass type |
|
Average mass |
- |
Population justification: The population size has not been directly estimated, but the species is described as uncommon (G. Dutson in litt. 2016, eBird 2021). Based on population density estimates of congeners, and assuming only a proportion of habitat is occupied, the population size is suspected to fall in the range of 2,500-9,999 mature individuals. However, this requires confirmation.
Trend justification: Remote sensing data (Global Forest Watch [2021], using data from Hansen et al. [2013] and methods disclosed therein) indicate that forest loss in this species' range was c.5% over the past decade and may accelerate to 5-15% over the next. As this is a forest dependent species, it is suspected that the rate of population decline will be broadly similar to the reduction in forest cover.
Country/territory distribution
Important Bird and Biodiversity Areas (IBA)
Recommended citation
BirdLife International (2024) Species factsheet: Numfor Leaf-warbler Phylloscopus maforensis. Downloaded from
https://datazone.birdlife.org/species/factsheet/numfor-leaf-warbler-phylloscopus-maforensis on 24/12/2024.
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 24/12/2024.