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

Taxonomic note
Vireo olivaceus (del Hoyo and Collar 2014) has been split into Red-eyed Vireo V. olivaceus and Chivi Vireo V. chivi, as previously adopted by Stotz et al. (1996). Battey and Klicka (2017) strengthen this case on the basis of complete genetic separation and entirely antithetical patterns of movement but make no attempt to consider morphological characters. Boesman (2016) provides further support via finding that there is an extreme likelihood that there are consistent differences between the songs, (allowing a score of 4), plus chivi has a dark brown versus ruby-red iris (3) and the different migratory habits (maximum permitted score 1). Consequently, Chivi Vireo V. chivi is accorded species status.

Taxonomic source(s)
Battey, C. J., & Klicka, J. 2017. Cryptic speciation and gene flow in a migratory songbird species complex: Insights from the Red-eyed Vireo (Vireo olivaceus). Molecular phylogenetics and evolution 113: 67-75.
Handbook of the Birds of the World and BirdLife International. 2019. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 4. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v4_Dec19.zip.
Stotz, D.F.; Fitzpatrick, J.W.; Parker, T.A.; Moskovits, D.K. 1996. Neotropical Birds: Ecology and Conservation. University of Chicago Press, Chicago.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2019	Least Concern
2016	Not Recognised
2012	Not Recognised
2008	Not Recognised
2006	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	17,300,000 km2
Extent of Occurrence (non-breeding)	15,600,000 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	-	suspected	-
Generation length	4.2 years	-	-	-

Population justification: Population size information is not available for this species, however it is known to be common (Brewer 2019).

Trend justification: The population is cautiously assessed as stable, however the species may be increasing regionally.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Argentina	extant	native	yes
Bolivia	extant	native	yes
Brazil	extant	native	yes
Colombia	extant	native	yes
Ecuador	extant	native	yes
French Guiana	extant	native	yes
Guyana	extant	native	yes
Paraguay	extant	native	yes
Peru	extant	native	yes
Suriname	extant	native	yes
Uruguay	extant	native	yes
Venezuela	extant	native	yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Rural Gardens	suitable	resident
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	resident
Forest	Subtropical/Tropical Dry	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Altitude	0 - 1500 m	Occasional altitudinal limits

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Chivi Vireo Vireo chivi. Downloaded from https://datazone.birdlife.org/species/factsheet/chivi-vireo-vireo-chivi 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.