Sooty Fox-sparrow (Passerella unalaschcensis)

Sooty Fox-sparrow Passerella unalaschcensis

Current view: Data table and detailed info

Taxonomy

Taxonomic note

Passerella iliaca, P. unalaschcensis, P. schistacea and P. megarhyncha (del Hoyo and Collar 2016) were previously lumped as P. iliaca following AERC TAC (2003); AOU (1998 & supplements); Cramp et al. (1977-1994); 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
2018	Least Concern
2016	Least Concern
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Species attributes

Migratory status	full migrant	Forest dependency	medium
Land-mass type		Average mass	33 g

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,770,000 km²	medium
Extent of Occurrence (non-breeding)	1,280,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	poor	estimated	2009
Population trend	stable	-	estimated	-
Generation length	4.5 years	-	-	-

Trend justification: This species has had stable population trends over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007).

Country/territory distribution

Country/Territory	Presence	Origin	Breeding visitor	Passage migrant
Bermuda (to UK)	extant	native
Canada	extant	native
Germany	extant	vagrant
Greenland (to Denmark)	extant	vagrant
Iceland	extant	vagrant
Ireland	extant	vagrant
Italy	extant	vagrant
Japan	extant	vagrant
Mexico	extant	native
Russia	extant	vagrant
Russia (Asian)	extant	vagrant
St Pierre and Miquelon (to France)	extant	native	yes	yes
USA	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Boreal	suitable	non-breeding
Forest	Boreal	suitable	breeding
Forest	Temperate	major	non-breeding
Forest	Temperate	major	breeding
Shrubland	Boreal	suitable	breeding
Shrubland	Boreal	suitable	non-breeding
Shrubland	Temperate	suitable	non-breeding
Shrubland	Temperate	suitable	breeding
Altitude		Occasional altitudinal limits

Utilisation

Purpose	Scale
Pets/display animals, horticulture	international

Recommended citation
BirdLife International (2024) Species factsheet: Sooty Fox-sparrow Passerella unalaschcensis. Downloaded from https://datazone.birdlife.org/species/factsheet/sooty-fox-sparrow-passerella-unalaschcensis on 23/11/2024.
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 23/11/2024.