• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note

Passerculus henslowii (del Hoyo and Collar 2016) was previously placed in the genus Ammodramus following AOU (1998 & supplements); Sibley & Monroe (1990, 1993).

 

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2021	Least Concern
2018	Least Concern
2016	Near Threatened	A2bc+3bc+4bc
2012	Near Threatened	A2bc+3bc+4bc
2008	Near Threatened	A2b,c; A3b,c; A4b,c
2004	Near Threatened
2000	Lower Risk/Least Concern
1994	Lower Risk/Near Threatened
1988	Near Threatened

Migratory status	full migrant	Forest dependency	does not normally occur in forest
Land-mass type	continent	Average mass	13 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,000,000 km2	medium
Extent of Occurrence (non-breeding)	1,490,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	410000 mature individuals	medium	estimated	2019
Population trend	increasing	poor	estimated	1998-2008
Generation length	2.12 years	-	-	-

Population justification: The global population is estimated to number 410,000 mature individuals (Partners in Flight 2019).

Trend justification: The species has been undergoing a moderate decline at an average rate of 0.6% per year between 1970 and 2017 (Partners in Flight 2019). This decline however appears to be historical; short-term trends suggest that the population has increased rapidly over the past ten years (Meehan et al. 2018; Pardieck et al. 2018).

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

Country/Territory	IBA Name
USA	Bark Camp Barrens Wildlife Management Area
USA	Big Oaks National Wildlife Refuge
USA	Chinook Fish and Wildlife Area and Chinook Mine
USA	Cypress Creek National Wildlife Refuge
USA	Goose Lake Prairie State Park
USA	Hillenbrand Fish and Wildlife Area
USA	Iroquois County State Conservation Area
USA	Kankakee Sands Project and surrounding natural areas
USA	Lynnville-Squaw Creek Mine Complex
USA	Midewin National Tallgrass Prairie
USA	Mississippi Sandhill Crane National Wildlife Refuge
USA	Mount Zion (Piney Tract)
USA	Prairie Ridge State Natural Area - Jasper and Marion Units
USA	Pratt's Wayne/Phillip State Park Grassland Complex
USA	Pyramid State Park
USA	Universal Mine
USA	Warren Prairie Natural Area

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Pastureland	suitable	non-breeding
Artificial/Terrestrial	Pastureland	suitable	breeding
Grassland	Temperate	major	non-breeding
Grassland	Temperate	major	breeding
Wetlands (inland)	Bogs, Marshes, Swamps, Fens, Peatlands	suitable	non-breeding
Wetlands (inland)	Bogs, Marshes, Swamps, Fens, Peatlands	suitable	breeding
Altitude		Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Scale Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Wood & pulp plantations - Agro-industry plantations	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Natural system modifications	Fire & fire suppression - Supression in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Ecosystem degradation
Natural system modifications	Fire & fire suppression - Trend Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Pollution	Agricultural & forestry effluents - Type Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Unknown		Unknown
		Stresses Ecosystem degradation
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion, Species mortality
Transportation & service corridors	Utility & service lines	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Species mortality

---

Recommended citation
BirdLife International (2024) Species factsheet: Henslow's Sparrow Passerculus henslowii. Downloaded from https://datazone.birdlife.org/species/factsheet/henslows-sparrow-passerculus-henslowii on 25/11/2024.
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 25/11/2024.