American Dusky Flycatcher (Empidonax oberholseri) | Details

American Dusky Flycatcher Empidonax oberholseri

Current view: Data table and detailed info

Taxonomy

Taxonomic source(s)
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.

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	10 g

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	4,210,000 km²	medium
Extent of Occurrence (non-breeding)	1,330,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	8800000 mature individuals	poor	estimated	2019
Population trend	stable	-	estimated	-
Generation length	2.1 years	-	-	-

Population justification: The global population is estimated to number 8,800,000 mature individuals (Partners in Flight 2019).

Trend justification: The species has been undergoing a moderate decline between 1970 and 2014 (Partners in Flight 2019; Rosenberg et al. 2019). Short-term trends however suggest that the species has been stable over the past ten years (Pardieck et al. 2018).

Country/territory distribution

Country/Territory	Presence	Origin	Breeding visitor	Non-breeding visitor	Passage migrant
Canada	extant	native	yes
Guatemala	extant	native		yes
Mexico	extant	native	yes	yes	yes
USA	extant	native	yes	yes	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	major	non-breeding
Forest	Temperate	major	breeding
Shrubland	Subtropical/Tropical High Altitude	major	non-breeding
Shrubland	Temperate	major	breeding
Altitude	650 - 3000 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: American Dusky Flycatcher Empidonax oberholseri. Downloaded from https://datazone.birdlife.org/species/factsheet/american-dusky-flycatcher-empidonax-oberholseri on 18/12/2024.
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 18/12/2024.