Sinaloa Crow

The Sinaloa crow is 35.5 to 38 cm (14 to 15 in) long; two individuals weighed 229 and 258 g (8.1 and 9.1 oz). The sexes have the same plumage, which is nearly identical to that of the Tamaulipas crow. Adults have glossy dark violet crown, nape, secondary wing coverts, and secondaries. The sides of their neck and their back, scapulars, rump, uppertail coverts, and primary coverts are glossy dark violet blue. Their primaries and rectrices are dark steel blue with a greenish tinge on the outer primaries and a violet tinge on the central rectrices. The sides of their head and their underparts are dark steel blue or greenish steel blue that becomes more greenish to the rear. They have a dark brown iris, a black bill, and black legs and feet. Juveniles are overall duller than adults.

The Sinaloa crow is found in western Mexico from southern Sonora south to southwestern Nayarit and east into western Durango. It inhabits gallery forest, deciduous forest, towns and villages, and pastures and agricultural land in the tropical zone. Though Davis described the species as also being found "on wet sand of the sea beach when the tide is out and along river estuaries", a previous publication addressing the pre-split C. imparatus had said that it avoided "maritime associations". Sources differ on its elevation range; two place it from sea level to 1,000 m (3,300 ft) and one only as high as 700 m (2,300 ft).

The Sinaloa crow is omnivorous; though detailed studies are lacking it has been observed feeding on "seeds, insects, fruit, roadkills, and garbage". It forages at all levels of its habitat. It is found in pairs, in small flocks, and outside of the breeding season in flocks that may reach 125 individuals.