Charco Escondido, Tamaulipas, Mexico.
Multiple analyses of mtDNA suggest that present species is sister to the “California clade” of C. corax, these taxa differing by only 1.75% (all mtDNA) to 1.8% (cytochrome b only), indicating that they diverged between 1.1 and 0.6 million years ago (well after the two main clades of C. corax diverged); this suggests that ancestor of present species may have been C. corax of “California clade” that became isolated in SW North America c. 1 million years ago. Monotypic.
SW USA in SE Colorado and from SE Arizona, S & E New Mexico and S Kansas S to W Oklahoma and W & S Texas and in N Mexico S to NW & NC Sonora, NE Jalisco, Guanajuato, NW Hidalgo, Nuevo León and C Tamaulipas. Winters throughout breeding range and also in NW & C Mexico (NW coast, and S to Guadalajara and Michoacán).
Food and feeding
Status and conservation
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