Black-throated Grey Warbler (Setophaga nigrescens)

Black-throated Grey Warbler Setophaga nigrescens

Current view: Data table and detailed info

Taxonomy

Taxonomic note

Setophaga nigrescens (del Hoyo and Collar 2016) was previously placed in the genus Dendroica following AOU (1998 & supplements); Sibley & Monroe (1990, 1993); Stotz et al. (1996).

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	9 g

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,940,000 km²	medium
Extent of Occurrence (non-breeding)	1,080,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	3200000 mature individuals	poor	estimated	2019
Population trend	decreasing	-	estimated	-
Rate of change over the past 10 years/3 generations (longer of the two periods)	8%	-	-	-
Generation length	2.44 years	-	-	-

Population justification: The global population is estimated to number 3.2 million mature individuals (Partners in Flight 2019).

Trend justification: The species is undergoing a moderate decline (Partners in Flight 2019; Rosenberg et al. 2019). Short-term trends suggest that the population has declined by 8% over the past ten years, though this value is non-significant (Pardieck et al. 2018).

Country/territory distribution

Country/Territory	Presence	Origin	Breeding visitor	Non-breeding visitor	Passage migrant
Canada	extant	native	yes
Mexico	extant	native	yes	yes	yes
USA	extant	native	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	Mediterranean-type Shrubby Vegetation	suitable	breeding
Shrubland	Subtropical/Tropical Dry	suitable	non-breeding
Altitude	1200 - 1800 m	Occasional altitudinal limits	(max) 2250 m

Recommended citation
BirdLife International (2024) Species factsheet: Black-throated Grey Warbler Setophaga nigrescens. Downloaded from https://datazone.birdlife.org/species/factsheet/black-throated-grey-warbler-setophaga-nigrescens on 24/11/2024.
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 24/11/2024.