Collared Crow
Corvus torquatus
It is about 52–55 cm in length—the same size or slightly larger than the carrion crow (C. corone), with proportionately slightly longer wings, tail, and bill. A sleek and handsome bird, it has glossy black plumage except for the back of the neck, upper back (mantle), and a broad band around the lower breast that is white. The bill, legs, and feet are black. It sometimes flies with its feet hanging down below the body in a characteristically "lazy" way. The voice is a loud kaaar repeated several times with other slight variations on it to suit the occasion.
ID text from Wikipedia, CC BY-SA 4.0
Sinaloa Crow
Corvus sinaloae
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. Voice: The Sinaloa crow's voice is the characteristic that led to its recognition as a species separate from the Tamaulipas crow. The Tamaulipas crow's voice is burry or croaking, characters absent from that of the Sinaloa crow.
ID text from Wikipedia, CC BY-SA 4.0
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Collared Crow and Sinaloa Crow.