LC
Sassi's Olive Greenbul Phyllastrephus lorenzi



Taxonomy

Taxonomic note
Phyllastrephus icterinus and P. lorenzi (del Hoyo and Collar 2016) were previously lumped as P. icterinus following Dowsett and Forbes-Watson (1993), Sibley and Monroe (1990, 1993) and Fishpool and Tobias (2005).

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
2016 Least Concern
2012 Not Recognised
2008 Not Recognised
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 medium
Land-mass type continent
Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 203,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected -
Generation length 4.5 years - - -

Population justification: The global population size has not been quantified, but the species prior to its split from P. icterinus was described as generally common to abundant (del Hoyo et al. 2005), and it is found in several subpopulations.

Trend justification: The population is suspected to be decreasing as a result of habitat loss.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Congo, The Democratic Republic of the extant native yes
Uganda extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Congo, The Democratic Republic of the Mount Hoyo Reserve
Congo, The Democratic Republic of the Okapi Faunal Reserve
Congo, The Democratic Republic of the Forests west of Lake Edward
Congo, The Democratic Republic of the Kahuzi-Biega National Park
Congo, The Democratic Republic of the Itombwe Mountains
Uganda Semliki National Park

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Moist Montane suitable resident
Forest Subtropical/Tropical Swamp suitable resident
Savanna Dry suitable resident
Altitude   Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Phyllastrephus lorenzi. Downloaded from https://datazone.birdlife.org/species/factsheet/sassis-olive-greenbul-phyllastrephus-lorenzi on 22/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 22/02/2024.