• 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
-	-	C1+2a(i)

Red List history

Year	Category	Criteria
2020	Vulnerable	C1+2a(i)
2017	Vulnerable	A2cde+3cde+4cde; C1+2a(i)
2016	Vulnerable	A2cde+3cde+4cde;B1ab(i,ii,iii,iv,v);C1+2a(i)
2012	Vulnerable	A2cde+3cde+4cde;B1ab(i,ii,iii,iv,v);C1+2a(i)
2008	Vulnerable	B1a+b(i,ii,iii,iv,v); C2a(i)
2004	Vulnerable
2000	Vulnerable
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	71,900 km2	medium
Number of locations	11-100	-
Severely fragmented?	yes	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	2500-9999 mature individuals	good	estimated	2019
Population trend	decreasing	poor	estimated	2009-2024
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	5.18 years	-	-	-
Number of subpopulations	2-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The breeding population was 4,000 pairs in 1993 (Woolfenden and Fitzpatrick 1996, G. E. Woolfenden in litt. 1998), but has declined by >25% since then (Boughton and Bowman 2011) and is now estimated at c.3,000 family groups (R. Bowman in litt. 2012). In many areas, average group size is below three, thus the global population is suspected to be 6,000-9,000 individuals, roughly equivalent to 4,000-6,000 mature individuals. Partners in Flight (2019) however, currently estimate the population to total 7,500 mature individuals, therefore the population is placed here in the band 2,500-9,999 mature individuals.

Trend justification: The species suffered a decline of >25% during 1992-2010 (Boughton and Bowman 2011), with populations in some areas suspected to have declined by as much as 40-80% (Boughton and Bowman 2011). Therefore, the rate of decline over three generations is calculated to be ~22%, placed here in the range 20-29%. This decline is suspected to be continuing, owing to current management strategies and the on-going impacts of development in Florida leading to habitat conversion and fire suppression (which causes habitat degradation), compounded by edge effects (Breininger et al. 2009, 2010, Johnson et al. 2011).

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

Country/Territory	IBA Name
USA	Avon Park Air Force Range-Bombing Range Ridge
USA	Brevard Scrub Ecosystem
USA	Cape Canaveral-Merritt Island
USA	Central Pasco
USA	Fisheating Creek Watershed
USA	Lake Wales Ridge
USA	Loxahatchee River and Slough
USA	Ocala National Forest - Lake George
USA	Oscar Scherer State Park
USA	St. Sebastian River State Buffer Preserve
USA	Withlacoochee-Panasoffkee-Big Scrub

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Shrubland	Subtropical/Tropical Dry	major	resident
Altitude	0 - 100 m	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		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Persecution/control	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species mortality
Climate change & severe weather	Droughts	Timing		Scope		Severity		Impact
		Past, Likely to Return		Majority (50-90%)		Slow, Significant Declines		Past Impact
		Stresses Ecosystem degradation, Reduced reproductive success
Climate change & severe weather	Storms & flooding	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Causing/Could cause fluctuations		Medium Impact: 6
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Pantherophis obsoletus	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Paspalum notatum	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Solenopsis invicta	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases	Problematic native species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		No decline		Low Impact: 4
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Viral/prion-induced diseases - West Nile Virus (WNV)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Species mortality
Natural system modifications	Fire & fire suppression - Supression in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Residential & commercial development	Commercial & industrial areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Transportation & service corridors	Roads & railroads	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: Florida Scrub-jay Aphelocoma coerulescens. Downloaded from https://datazone.birdlife.org/species/factsheet/florida-scrub-jay-aphelocoma-coerulescens on 25/12/2024.
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 25/12/2024.