• 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	A2bce+3bce+4bce
2017	Near Threatened	A2bce+3bce+4bce
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

Migratory status	full migrant	Forest dependency	does not normally occur in forest
Land-mass type		Average mass	52 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	13,500,000 km2	medium
Extent of Occurrence (non-breeding)	9,930,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	7000000 mature individuals	poor	estimated	2019
Population trend	decreasing	-	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	2.98 years	-	-	-

Population justification: Partners in Flight (2019) estimate the population to total 7,000,000 mature individuals.

Trend justification: This species has undergone a large and statistically significant decrease over the last 40 years in North America (-71.2% decline over 40 years; data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven [Sauer et al. 2017]). Partners in Flight (2019) suggest a current population decline of ~24% throughout the species's range across the stipulated ten year period, thus an ongoing decline of 20-29% is estimated here.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Bahamas	extant	vagrant
Canada	extant	native		yes
Guatemala	extant	vagrant
Mexico	extant	native	yes		yes
Turks and Caicos Islands (to UK)	extant	vagrant
USA	extant	native	yes	yes	yes

Country/Territory	IBA Name
Mexico	Pradera de Tokio
Mexico	Santiaguillo
Mexico	Sierra de Manantlán

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	suitable	non-breeding
Artificial/Terrestrial	Arable Land	suitable	breeding
Artificial/Terrestrial	Pastureland	major	non-breeding
Artificial/Terrestrial	Pastureland	major	breeding
Artificial/Terrestrial	Rural Gardens	suitable	non-breeding
Artificial/Terrestrial	Rural Gardens	suitable	breeding
Forest	Temperate	marginal	resident
Grassland	Subtropical/Tropical Dry	suitable	non-breeding
Grassland	Subtropical/Tropical Dry	suitable	breeding
Grassland	Temperate	suitable	breeding
Savanna	Dry	suitable	non-breeding
Savanna	Dry	suitable	breeding
Shrubland	Subtropical/Tropical Dry	major	breeding
Shrubland	Subtropical/Tropical Dry	major	non-breeding
Shrubland	Subtropical/Tropical High Altitude	suitable	non-breeding
Shrubland	Subtropical/Tropical High Altitude	suitable	breeding
Altitude	0 - 2000 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%)		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Persecution/control	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Climate change & severe weather	Storms & flooding	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Unknown		Unknown
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Problematic species/disease of unknown origin - Unspecified species	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Viral/prion-induced diseases - West Nile Virus (WNV)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Species mortality
Pollution	Agricultural & forestry effluents - Herbicides and pesticides	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Reduced reproductive success, Species mortality
Transportation & service corridors	Roads & railroads	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Species mortality

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Recommended citation
BirdLife International (2024) Species factsheet: Loggerhead Shrike Lanius ludovicianus. Downloaded from https://datazone.birdlife.org/species/factsheet/loggerhead-shrike-lanius-ludovicianus on 23/12/2024.
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 23/12/2024.