LC
Purple-chested Hummingbird Polyerata rosenbergi



Taxonomy

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.

IUCN Red List criteria met and history
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
Species attributes

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

Estimate Data quality
Extent of Occurrence (breeding/resident) 153,000 km2 medium
Severely fragmented? no -
Population
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 distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Colombia extant native yes
Ecuador extant native yes

Important Bird and Biodiversity Areas (IBA)
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

Habitats & altitude
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

Threats & impact
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

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 23/12/2024.
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 23/12/2024.