LC
Bay-breasted Warbler Setophaga castanea



Taxonomy

Taxonomic note

Setophaga castanea (del Hoyo and Collar 2016) was previously placed in the genus Dendroica 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#.
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
2018 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 12 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 4,130,000 medium
Extent of Occurrence non-breeding (km2) 1,330,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 9900000 poor estimated 2019
Population trend Increasing 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 9.9 million mature individuals (Partners in Flight 2019).

Trend justification: The species has been undergoing a small decline at an average rate of 0.5% per year between 1970 and 2017 (Partners in Flight 2019; Rosenberg et al. 2019). Short-term trends however suggest that this decline is historical; the population has been increasing by 24% 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
Aruba (to Netherlands) V Extant Yes
Bahamas N Extant Yes
Belize N Extant Yes
Bermuda (to UK) V Extant
Canada N Extant Yes Yes
Cayman Islands (to UK) N Extant Yes
Colombia N Extant Yes
Costa Rica N Extant Yes Yes
Cuba N Extant Yes
Dominican Republic V Extant Yes
Ecuador V Extant Yes
Greenland (to Denmark) V Extant
Guadeloupe (to France) V Extant Yes
Guatemala N Extant Yes
Haiti V Extant Yes
Honduras N Extant Yes
Jamaica N Extant Yes
Mexico N Extant Yes
Nicaragua N Extant Yes Yes
Panama N Extant Yes Yes
Portugal V Extant
Puerto Rico (to USA) V Extant Yes
St Pierre and Miquelon (to France) V Extant Yes
Trinidad and Tobago V Extant Yes
Turks and Caicos Islands (to UK) N Extant Yes
United Kingdom V Extant
USA N Extant Yes Yes
Venezuela N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Canada Lac La Biche

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Boreal major breeding
Forest Subtropical/Tropical Moist Lowland major non-breeding
Forest Temperate suitable breeding
Altitude   Occasional altitudinal limits  

Recommended citation
BirdLife International (2022) Species factsheet: Setophaga castanea. Downloaded from http://www.birdlife.org on 29/06/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/06/2022.