Chilean Woodstar Eulidia yarrellii


Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: #

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
A2ace+4ace A2ace+3ce+4ace; C2a(i) A2ace+3ce+4ace; C2a(i); D1

Red List history
Year Category Criteria
2018 Critically Endangered A2ace+4ace
2016 Critically Endangered A2ace+3ce+4ace
2015 Critically Endangered A2ace+3ce+4ace
2014 Critically Endangered A2ace+3ce+4ace
2012 Endangered B1ab(i,ii,iii,v)
2008 Endangered B1a+b(i,ii,iii,v)
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 Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 10,500 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 270-395 good estimated 2015
Population trend Decreasing poor estimated -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 40-70 - - -
Decline (10 years/3 generation past and future) 80 - - -
Number of subpopulations - - -
Largest subpopulations - - -
Generation length (yrs) 4.2 - - -

Population justification: Recent counts from 2010-2015 have produced estimates of between 405 and 592 individuals (Lazzoni Traversaro 2015, Yañez 2016), which roughly equates to 270 - 395 mature individuals.

Trend justification: Evidence from surveys and anecdotal observations indicates that this species has undergone 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). Although the rate of decline appears to have lessened over recent years, population counts from between 2003 and 2015 (Lazzoni Traversaro 2015, Yañez 2016) indicate that the population has likely undergone a reduction of approximately 80% across the past three generation lengths.

Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Chile N Extant Yes
Peru N Possibly Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Peru Tacna
Chile Valle de Lluta
Chile Valle Camarones
Chile Valle de Chaca
Chile Valle de Codpa
Chile Desembocadura del Río Lluta
Chile Valle Azapa
Chile Precordillera Socoroma-Putre

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) 3000 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
Hybridisation, Competition
Pollution Agricultural & forestry effluents - Herbicides and pesticides Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Declines Medium Impact: 7
Indirect ecosystem effects, Ecosystem degradation

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

Recommended citation
BirdLife International (2020) Species factsheet: Eulidia yarrellii. Downloaded from on 19/09/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from on 19/09/2020.