LC
Unicolored Jay Aphelocoma unicolor



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
2020 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 not a migrant Forest dependency medium
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 535,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 50000-499999 mature individuals poor estimated 2019
Population trend decreasing - suspected -
Generation length 4.9 years - - -

Population justification: The global population is estimated to number 50,000-499,999 mature individuals (Partners in Flight 2019).

Trend justification:

The species is undergoing a moderate decline (Partners in Flight 2019), which is thought to be caused by low levels of habitat loss within the range (Tracewski et al. 2016).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
El Salvador extant native yes
Guatemala extant native yes
Honduras extant native yes
Mexico extant native yes
Nicaragua extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Guatemala Atitlan
Guatemala Sierra de las Minas - Motagua
Guatemala Santiaguito Volcano
Guatemala Cuchumatanes
Guatemala Montecristo
El Salvador Montecristo Forest
Mexico Cerros de Chalchihuitán
Mexico Omiltemi
Mexico Tlanchinol y Bosques de Montaña del Noreste de Hidalgo
Mexico Sierra de Zongolica-Tenango

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest suitable non-breeding
Forest Subtropical/Tropical Moist Montane major resident
Altitude 1300 - 3300 m Occasional altitudinal limits (max) 3400 m

Recommended citation
BirdLife International (2024) Species factsheet: Aphelocoma unicolor. Downloaded from https://datazone.birdlife.org/species/factsheet/unicolored-jay-aphelocoma-unicolor on 04/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 04/03/2024.