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Chilean Woodstar Eulidia yarrellii
BirdLife is updating this factsheet for the 2016 Red List
Please email us with any relevant information

IUCN Red List Criteria

Critically Endangered A2ace+3ce+4ace 
Endangered A2ace+3ce+4ace; B1ab(i,ii,iii,v) 
Vulnerable A2ace+3ce+4ace; B1ab(i,ii,iii,v); D1+2 

IUCN Red List history

Year Category
2015 Critically Endangered
2014 Critically Endangered
2012 Endangered
2008 Endangered
2004 Endangered
2000 Endangered
1996 Vulnerable
1994 Vulnerable
1988 Threatened

Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type continent
Average mass -


  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 2,200 medium
Number of locations 2 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 350 medium Estimated 2012
Population trend Decreasing poor Suspected -
Number of subpopulations 2-100 - - -
Largest subpopulation - - -
Generation length (yrs) 4.2 - - -
Population justification: Estades (in litt. 2007) estimated the population to number 650 individuals in Azapa, and 550 in Chaca. This totals 1,200 individuals, roughly equivalent to 800 mature individuals. Previously, Estades et al. (2007) had calculated a Chilean population of 1,539 individuals in September 2003. Recent information, however, suggests that the population of this species has since declined to around 500 individuals (D. Lebbin in litt. 2012). This estimate is assumed to equate to a population of c. 335 mature individuals, rounded here to c.350 mature individuals.
Trend justification: Evidence from surveys and anecdotal observations indicates that this species is undergoing an extremely rapid decline. Population estimates have shown that the Azapa and Chaca populations have reduced by 15.6% annually (81.6%) in 10 years (C. F. Estades in litt. 2013).

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Chile Native Extant Yes      
Peru Native Extant   Yes    

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Chile Desembocadura del Río Lluta site factsheet
Chile Precordillera Socoroma-Putre site factsheet
Chile Valle Azapa site factsheet
Chile Valle Camarones site factsheet
Chile Valle de Chaca site factsheet
Chile Valle de Codpa site factsheet
Chile Valle de Lluta site factsheet
Peru Tacna site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Arable Land Major resident
Artificial/Terrestrial Rural Gardens Suitable resident
Desert Hot Major resident
Shrubland Subtropical/Tropical Dry Suitable resident
Altitude 200 - 700 m Occasional altitudinal limits (max) 2600 m

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Small-holder farming Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Declines Medium Impact: 7
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Problematic native species/diseases / Thaumastura cora Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Pollution Agricultural & forestry effluents / Herbicides and pesticides Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Indirect ecosystem effects, Ecosystem degradation


Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - -  
Pets/display animals, horticulture - - - International

Recommended citation
BirdLife International (2016) Species factsheet: Eulidia yarrellii. Downloaded from on 24/10/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from on 24/10/2016.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Critically Endangered
Family Trochilidae (Hummingbirds)
Species name author (Bourcier, 1847)
Population size 350 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 2,200 km2
Country endemic? No
Links to further information
- Summary information on this species