Western Bluebird (Sialia mexicana) - BirdLife species factsheet

Western Bluebird Sialia mexicana

Current view: Data table and detailed info

Taxonomy

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
2021	Least Concern
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

Species attributes

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

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	4,700,000 km²	medium
Extent of Occurrence (non-breeding)	3,790,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	7100000 mature individuals	poor	inferred	2019
Population trend	increasing	-	inferred	-
Generation length	2.56 years	-	-	-

Population justification: The global population is inferred to number 7.1 million mature individuals (Partners in Flight 2019).

Trend justification: The species is increasing at a rate of 0.8% per year (Partners in Flight 2019). Short-term trends suggest that the population in North America increased by 17% over the past ten years (Pardieck et al. 2018).

Country/territory distribution

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

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	suitable	non-breeding
Artificial/Terrestrial	Arable Land	suitable	breeding
Artificial/Terrestrial	Plantations	suitable	non-breeding
Artificial/Terrestrial	Plantations	suitable	breeding
Forest	Subtropical/Tropical Moist Montane	major	non-breeding
Forest	Subtropical/Tropical Moist Montane	major	breeding
Shrubland	Subtropical/Tropical High Altitude	suitable	non-breeding
Shrubland	Subtropical/Tropical High Altitude	suitable	breeding
Altitude	1200 - 4000 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Western Bluebird Sialia mexicana. Downloaded from https://datazone.birdlife.org/species/factsheet/western-bluebird-sialia-mexicana on 26/11/2024.
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 26/11/2024.