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

Taxonomic note

Chlorodrepanis virens (del Hoyo and Collar 2016) was previously placed in the genus Hemignathus following AOU (1998 & supplements); 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
2023	Least Concern
2016	Least Concern
2012	Least Concern
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	low
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	20,300 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	400000-800000 mature individuals	medium	estimated	2009
Population trend	stable	-	suspected	-
Generation length	2.93 years	-	-	-

Population justification: The population is estimated at approximately 850,000 individuals, with 800,000 on Hawai‘i island (Scott et al. 1986, Gorreson et al. 2009, Kendall et al. 2022). This is roughly equivalent to 570,000 mature individuals, placed here in the band 400,000-800,000.

Trend justification: Overall populations are thought to be stable on Hawai'i and Maui (Lindsey et al. 2020) and the species continues to be highly abundant (Kendall et al. 2022). Trends were inconclusive across all strata (open-forest, closed-forest and pasture) in the Hakalau Forest Unit on Hawai‘i island in both time periods 1999-2019 and 2010-2019, although density in closed forest alone appears to be decreasing (Kendall et al. 2022). At the Kona Forest Unit, trends were stable in both upper and lower strata and overall between 1999-2019. Populations at Hakalau and Kona forest units comprise c.12% of the total population and overall the population is suspected to be stable in the absence of evidence for any declines or substantial threats.

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

Country/Territory	IBA Name
USA	Haleakala
USA	Hamakua Forests
USA	Kau Forest
USA	Kona Forests
USA	Mauna Kea Mamane - Naio Forest
USA	Mauna Loa-Kilauea Forests
USA	Molokai Forests

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	suitable	resident
Forest	Subtropical/Tropical Dry	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Altitude	25 - 3000 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Plasmodium relictum	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Species mortality

Purpose	Scale
Pets/display animals, horticulture	international

---

Recommended citation
BirdLife International (2024) Species factsheet: Hawaii Amakihi Chlorodrepanis virens. Downloaded from https://datazone.birdlife.org/species/factsheet/hawaii-amakihi-chlorodrepanis-virens on 23/11/2024.
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 23/11/2024.