• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note

Phyllastrephus albigularis and P. viridiceps (del Hoyo and Collar 2016) were previously lumped as P. albigularis following Dowsett & Forbes-Watson (1993) and Sibley & Monroe (1990, 1993).

 

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2022	Near Threatened	C2a(ii)
2016	Vulnerable	C2a(ii)
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	medium
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	36,800 km2	medium
Area of Occupancy (breeding/resident)	15,404 km2
Number of locations	11-100	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	2500-9999 mature individuals	poor	suspected	2016
Population trend	decreasing	-	suspected	2016-2027
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Generation length	3.69 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: This species has been described as common (Dean 2000) but more recently as not common and not widespread (M. Mills in litt. 2016). The species occurs in scarp forest, a quite different habitat to the closely related White-throated Greenbul P. albigularis and it is likely that it occurs at far lower densities than that species (which has been estimated to occur at 114 individuals/km² in unlogged and 83 individuals/km² in logged forest [Owiunji and Plumptre 1998]). As a consequence of its apparent rarity the population size is tentatively placed in the range of 2,500-9,999 mature individuals, roughly equating to 3,750-15,000 total individuals, though this requires confirmation.

Trend justification: Tree cover loss within the range is currently estimated at 11% over three generations (11.07 years) (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein), although in some areas 20-70% of canopy trees and undergrowth is being cleared for subsistence agriculture, while in others it may reach 95% forest loss (Dean 2001). Assuming that population declines are roughly equivalent to the rate of forest loss, the species may be declining at <19% over three generations.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Angola	extant	native	yes

Country/Territory	IBA Name
Angola	Camabatela
Angola	Gabela

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Altitude	900 - 1850 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion

---

Recommended citation
BirdLife International (2024) Species factsheet: Angola Greenbul Phyllastrephus viridiceps. Downloaded from https://datazone.birdlife.org/species/factsheet/angola-greenbul-phyllastrephus-viridiceps on 22/12/2024.
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 22/12/2024.