LC
Wilson's Warbler Cardellina pusilla



Taxonomy

Taxonomic note

Cardellina pusilla (del Hoyo and Collar 2016) was previously placed in the genus Wilsonia following AERC TAC (2003); AOU (1998 & supplements); Cramp et al. (1977-1994); SACC (2005 & updates); Sibley & Monroe (1990, 1993); Stotz et al. (1996).

 

Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: #http://www.aerc.eu/DOCS/Bird_taxa_of _the_WP15.xls#.
Cramp, S. and Simmons, K.E.L. (eds). 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2021 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 full migrant Forest dependency Medium
Land mass type Average mass 7 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 19,600,000 medium
Extent of Occurrence non-breeding (km2) 4,260,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 81000000 poor estimated 2019
Population trend Decreasing 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) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -

Population justification: The global population is estimated to number 81 million mature individuals (Partners in Flight 2019).

Trend justification: The species is undergoing a large, significant decline (Partners in Flight 2019; Rosenberg et al. 2019). Short-term trends suggest that the population has declined by 10% over the past ten years, though this value is non-significant (Pardieck et al. 2018).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Bahamas V Extant Yes
Belize N Extant Yes
Bermuda (to UK) V Extant Yes
Canada N Extant Yes Yes
Cayman Islands (to UK) V Extant Yes
Colombia V Extant Yes
Costa Rica N Extant Yes Yes
Cuba V Extant Yes
Dominican Republic V Extant Yes
Ecuador V Extant Yes
El Salvador N Extant Yes
Greenland (to Denmark) V Extant
Guatemala N Extant Yes
Haiti V Extant Yes
Honduras N Extant Yes
Jamaica V Extant Yes
Mexico N Extant Yes Yes
Nicaragua N Extant Yes Yes
Panama N Extant Yes Yes
Puerto Rico (to USA) V Extant Yes
St Pierre and Miquelon (to France) V Extant Yes
United Kingdom V Extant Yes
USA N Extant Yes Yes Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Arable Land suitable non-breeding
Artificial/Terrestrial Pastureland suitable non-breeding
Artificial/Terrestrial Plantations suitable non-breeding
Artificial/Terrestrial Rural Gardens suitable non-breeding
Forest Boreal suitable breeding
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level suitable non-breeding
Forest Subtropical/Tropical Moist Lowland suitable non-breeding
Forest Subtropical/Tropical Moist Montane suitable non-breeding
Forest Temperate suitable breeding
Grassland Subtropical/Tropical Dry suitable non-breeding
Grassland Subtropical/Tropical High Altitude suitable non-breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable non-breeding
Grassland Temperate suitable breeding
Shrubland Boreal suitable breeding
Shrubland Subarctic suitable non-breeding
Shrubland Subtropical/Tropical High Altitude suitable non-breeding
Shrubland Subtropical/Tropical Moist suitable non-breeding
Shrubland Temperate suitable breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable breeding
Wetlands (inland) Shrub Dominated Wetlands suitable breeding
Altitude 0 - 3500 m Occasional altitudinal limits  

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

Recommended citation
BirdLife International (2022) Species factsheet: Cardellina pusilla. Downloaded from http://www.birdlife.org on 03/07/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 03/07/2022.