South-eastern Sonora and south-western Chihuahua southern in Sierra Madre Occidental to western Zacatecas and northern Jalisco. Considered by some authors to be a subspecies of Ultramarine Jay (Aphelocoma ultramarina).
Population
Estimated population is 2,000,000 (2010).
Mexican Jay (Aphelocoma wollweberi) [XC281846]
by Paul Marvin from Upper Cave Creek, Chiricahua Mountains, Cochise County, Arizona, United States (call, flight call)
Mexican Jay (Aphelocoma wollweberi) [XC237174]
by Paul Marvin from South Fork Road, Portal, Arizona, United States (begging call)
Subspecies
Considered by some authors to be a subspecies of Ultramarine Jay (Aphelocoma ultramarina).
The following 5 subspecies are recognised:
arizonae (Ridgway, 1874) - Southern USA (south-eastern Arizona and south-western New Mexico) south to northern Mexico (northern Sonora and north-western Chihuahua). Considered by some authors to be a subspecies of Ultramarine Jay (Aphelocoma ultramarina).
wollweberi Kaup, 1854 - South-eastern Sonora and south-western Chihuahua southern in Sierra Madre Occidental to western Zacatecas and northern Jalisco. Considered by some authors to be a subspecies of Ultramarine Jay (Aphelocoma ultramarina).
potosina Nelson, 1899 - East-central Mexico (San Luis Potosí south to central Hidalgo). Considered by some authors to be a subspecies of Ultramarine Jay (Aphelocoma ultramarina).
couchii (Baird, SF, 1858) - Extreme southern USA (Chisos Mts of extreme south-western Texas) southern in Sierra Madre Oriental to southern Nuevo León and northern San Luis Potosí. Considered by some authors to be a subspecies of Ultramarine Jay (Aphelocoma ultramarina).
gracilis Miller, GS, 1896 - Western Mexico (Nayarit and north-western Jalisco). Considered by some authors to be a subspecies of Ultramarine Jay (Aphelocoma ultramarina).
BirdLife International Species Factsheet