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

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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2022	Least Concern
2016	Near Threatened	A3c
2012	Near Threatened	A3c
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,828,500 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	50000-99999 mature individuals	poor	inferred	2021
Population trend	stable	-	suspected	-
Generation length	2.7 years	-	-	-
Number of subpopulations	2-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The global population size has not been quantified, but the species is described as uncommon to fairly common, albeit local (Stotz et al. 1996, Brewer 2020). Based on observed population densities of congeners (H. hypoxanthus and H. ochcraceiceps in Peru: 9-15 mature individuals/km²; Santini et al. 2018), and assuming that only 10% of the mapped range is occupied to account for this species's localised occurrence, the population may number c.55,000-93,000 mature individuals. To account for uncertainty the population size is here placed in the band 50,000-99,999 mature individuals, but an accurate quantification of the population size is required.
Based on observational records (per eBird 2021) the species likely functions as several subpopulations.

Trend justification: Due to its preference for secondary growth, forest edges and clearings, the species is unlikely to be threatened by habitat degradation and loss. Throughout its range, tree cover is lost at a rate of 4% over ten years (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). In the absence of evidence for any declines or substantial threats, the species is tentatively assessed as stable.

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Altitude	600 - 1700 m	Occasional altitudinal limits

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%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Agro-industry grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Olivaceous Greenlet Hylophilus olivaceus. Downloaded from https://datazone.birdlife.org/species/factsheet/olivaceous-greenlet-hylophilus-olivaceus on 26/12/2024.
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 26/12/2024.