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

Taxonomic note
Previously listed as Amazilia humboldtii (del Hoyo and Collar 2014), and before that in the genus Hylocharis, but moved to current genus following a recent overhaul of all genera by NACC, based on McGuire et al. (2014), Stiles et al. (2017a, b) and others. Treated as conspecific with C. grayi in HBW, but acknowledged there to be very different in coloration, measurements and ecology; differs from grayi in having dull metallic green vs dark metallic blue tail (3); shorter bill (effect size -3.3, although n=7) (2); longer wings and tail (effect size for wing 1.82, although n=7) (1); male with blue on forehead, not all crown, and with more extensive blue on throat (bluish-black and confined to chin in grayi) (3); female with much whiter, less green-spotted underparts with clear throat (2); mangroves and adjacent wet second-growth habitat vs dry scrub and woodland edges in dry, rainshadow valleys (1). Monotypic.

Taxonomic source(s)
Handbook of the Birds of the World and BirdLife International. 2022. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 7. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v7_Dec22.zip.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2022	Least Concern
2022	Least Concern
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2006	Least Concern
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	6 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	119,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	20000-49999 mature individuals	poor	suspected	2019
Population trend	decreasing	-	suspected	2016-2026
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	2.48 years	-	-	-

Population justification: The global population is estimated to number fewer than 50,000 mature individuals (Partners in Flight 2020); therefore it is here tentatively placed in the band 20,000-49,999 mature individuals. The species is described as very rare in Ecuador and very local in Colombia (Restall et al. 2006).

Trend justification: This species is undergoing a small decline (Partners in Flight 2020), which is thought to be caused by the loss of its mangrove habitat to shrimp farming (del Hoyo et al. 1999). Tree cover within the range is lost at a rate of 9% over ten years (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). Apart from mangroves, the species also occupied secondary growth and forest edges, and therefore the rate of population decline is suspected to not exceed 20% over ten years.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Colombia	extant	native	yes
Ecuador	extant	native	yes
Panama	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 Mangrove Vegetation Above High Tide Level	major	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 200 m	Occasional altitudinal limits	(max) 350 m

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Marine & freshwater aquaculture - Industrial aquaculture	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Humboldt's Hummingbird Chrysuronia humboldtii. Downloaded from https://datazone.birdlife.org/species/factsheet/humboldts-hummingbird-chrysuronia-humboldtii on 16/12/2024.
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 16/12/2024.