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

Taxonomic note
Previously listed as Amazilia rosenbergi (del Hoyo and Collar 2014), 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. Proposed subspecies reini (NW Ecuador) separated on basis of extent of breast patch, different throat coloration and longer bill, but these traits are deemed attributable to individual variation. 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
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	high
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	153,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	-	suspected	-
Generation length	2.25 years	-	-	-

Population justification: The global population size has not been quantified, but this species is described as fairly common or locally common (Weller et al. 2021). A population density of 4-6 mature individuals/km² could be observed (Weller et al. 2021); the overall population is therefore unlikely to be small.

Trend justification: The population trend has not been investigated, but the only potential threat to the species is the logging and fragmentation of forests within the range. Tree cover loss within the range is very low (2% over ten years; Global Forest Watch 2023, using Hansen et al. [2013] data and methods disclosed therein). Apart from forests, the species also occurs in forest edge, secondary growth and clearings (Weller et al. 2021);  consequently, the current rate of tree cover loss may not be affecting the population. Therefore, in the absence of evidence for any declines or substantial threats, the population is suspected to be stable.

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

Country/Territory	IBA Name
Colombia	Reserva Natural El Pangán
Colombia	Reserva Natural Río Ñambí
Ecuador	Cayapas-Santiago-Wimbí
Ecuador	Centro Científico Río Palenque
Ecuador	Corredor Awacachi
Ecuador	Intag-Toisán
Ecuador	Los Bancos - Milpe
Ecuador	Mashpi-Pachijal
Ecuador	Reserva Ecológica Cotacachi-Cayapas
Ecuador	Río Caoní
Ecuador	Territorio Étnico Awá y alrededores
Ecuador	Verde-Ónzole-Cayapas-Canandé

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 600 m	Occasional altitudinal limits	(max) 900 m

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		No decline		Low Impact: 4
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: Purple-chested Hummingbird Polyerata rosenbergi. Downloaded from https://datazone.birdlife.org/species/factsheet/purple-chested-hummingbird-polyerata-rosenbergi on 22/11/2024.
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 22/11/2024.