LC
Grey-headed Greenbul Phyllastrephus poliocephalus



Taxonomy

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
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2022 Least Concern
2016 Near Threatened A2c+3c+4c
2013 Near Threatened A2c+3c+4c
2012 Near Threatened B1ab(i,ii,iii)
2008 Near Threatened B1a+b(i,ii,iii)
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Near Threatened
1988 Near Threatened
Species attributes

Migratory status not a migrant Forest dependency high
Land-mass type continent
Average mass 53 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 46,700 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected 2016-2029
Rate of change over the past 10 years/3 generations (longer of the two periods) 1-9% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 1-9% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 1-9% - - -
Generation length 4.37 years - - -

Population justification: The global population size has not been quantified, but the species is described as common in suitable habitat (del Hoyo et al. 2005).

Trend justification: The population is suspected to be declining owing to on-going habitat loss and degradation (del Hoyo et al. 2005). Deforestation rates have been low over the past three generations (13.11 years), amounting to 2% (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). The species tolerates secondary habitat so forest loss alone is unlikely to drive major declines. Population declines are therefore suspected to not exceed 10% over three generations.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Cameroon extant native yes
Nigeria extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Cameroon Banyang Mbo Wildlife Sanctuary
Cameroon Mont Manengouba
Cameroon Bakossi mountains
Cameroon Mont Nlonako
Cameroon Mount Rata and Rumpi Hills Forest Reserve
Cameroon Mount Kupe
Cameroon Mount Cameroon and Mokoko-Onge
Nigeria Obudu Plateau

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland suitable resident
Forest Subtropical/Tropical Moist Montane major resident
Altitude 1200 - 1800 m Occasional altitudinal limits 500 - 2000 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations - Agro-industry plantations Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation
Natural system modifications Fire & fire suppression - Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Phyllastrephus poliocephalus. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-headed-greenbul-phyllastrephus-poliocephalus on 19/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 19/03/2024.