Small glossy crow, common in northeast Mexico. Occurs in towns, villages, rubbish dumps, farmland, and semiopen areas with hedges and taller trees. Social and usually in flocks, at times of hundreds. Most likely to be confused with male Great-tailed Grackle, which has pale eyes and longer and keel-shaped tail (shed in late-summer molt). Chihuahuan Raven much larger, with much heavier bill and different voice. Calls of Tamaulipas Crow are low, froglike croaks.