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

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
2020	Near Threatened	A2abc+3bc+4abc
2018	Near Threatened	A2ac+3c+4ac
2016	Near Threatened	A2c
2012	Near Threatened	A2c
2008	Near Threatened	A2c
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Migratory status	not a migrant	Forest dependency	medium
Land-mass type	continent	Average mass	19 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,650,000 km2	medium
Extent of Occurrence (non-breeding)	1,150,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	170000 mature individuals	medium	estimated	2019
Population trend	decreasing	medium	estimated	2014-2024
Rate of change over the past 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Generation length	2.19 years	-	-	-

Population justification: Partners in Flight (2019) estimate the population size at 170,000 mature individuals.

Trend justification: Data from the Breeding Bird Survey suggests that between 2010-2015, the species underwent an ~2.52% annual decline, which equates to a ~22.5% decline across the stipulated ten year period (Sauer et al. 2017). Similarly, the Christmas Bird Count (between 1966 and 2017) suggests annual declines of a comparable magnitude, ~2.61% per year, which equates to a ~23.2% decline across the ten year period (Meehan et al. 2018). Finally, Partners in Flight (2019) have given the species a half-life of ~24 years, which equates to an annual decline of ~3.1%, or ~26.8% decline over the next ten years. Given all such calculations. the rate of decline is placed in the range 20-29%.

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

Country/Territory	IBA Name
USA	Babcock-Webb Ecosystem
USA	Fort Chaffee
USA	Ichetucknee Springs State Park
USA	Kissimmee Prairie Preserve and State Park
USA	Myakka River Watershed
USA	Sandhills West
USA	Shortleaf Pine-Bluestem Grass Ecosystem Management Area
USA	Wekiwa Basin GEOPark

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	major	resident
Forest	Temperate	major	resident
Shrubland	Temperate	suitable	resident
Altitude	0 - 900 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Human intrusions & disturbance	Recreational activities	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		No decline		Low Impact: 4
		Stresses Species disturbance
Natural system modifications	Fire & fire suppression - Supression in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion
Transportation & service corridors	Utility & service lines	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Bachman's Sparrow Peucaea aestivalis. Downloaded from https://datazone.birdlife.org/species/factsheet/bachmans-sparrow-peucaea-aestivalis 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.