LC
Acadian Flycatcher Empidonax virescens



Taxonomy

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 -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 4,320,000 km2 medium
Extent of Occurrence (non-breeding) 2,070,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 5200000 mature individuals poor estimated 2019
Population trend stable - estimated -
Generation length 2.92 years - - -

Population justification: The global population is estimated to number 5,200,000 mature individuals (Partners in Flight 2019).

Trend justification: This species has been undergoing a slow decline between 1970 and 2017 (Partners in Flight 2019; Rosenberg et al. 2019). Short-term trends however suggest that this decline is historical and that the population is stabilising or even increasing over the past ten years (Pardieck et al. 2018).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Bahamas extant native yes
Belize extant native yes
Canada extant native yes
Cayman Islands (to UK) extant vagrant yes
Colombia extant native yes
Costa Rica extant native yes yes
Cuba extant native yes
Ecuador extant native yes
El Salvador extant native yes
Guatemala extant native yes
Honduras extant native yes
Mexico extant native yes
Nicaragua extant native yes yes
Panama extant native yes yes
Puerto Rico (to USA) extant vagrant
Turks and Caicos Islands (to UK) extant vagrant
USA extant native yes yes
Venezuela extant native yes

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

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable non-breeding
Forest Boreal suitable breeding
Forest Subtropical/Tropical Moist Lowland major non-breeding
Forest Subtropical/Tropical Moist Lowland major breeding
Forest Temperate major breeding
Shrubland Subtropical/Tropical Moist suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable breeding
Altitude 0 - 1200 m Occasional altitudinal limits (max) 2850 m

Recommended citation
BirdLife International (2024) Species factsheet: Empidonax virescens. Downloaded from https://datazone.birdlife.org/species/factsheet/acadian-flycatcher-empidonax-virescens on 24/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 24/02/2024.