Acadian Flycatcher (Empidonax virescens) | Details

Acadian Flycatcher Empidonax virescens

Current view: Data table and detailed info

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: https://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	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: Acadian Flycatcher Empidonax virescens. Downloaded from https://datazone.birdlife.org/species/factsheet/acadian-flycatcher-empidonax-virescens on 22/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 22/12/2024.