Length 12 inches. It breeds throughout the United States west to Texas, Colorado, and Montana and in southern Canada and winters in the southern half of its breeding range.

This is a beautiful blackbird that is well known from its habit of congregating in city parks and nesting there year after year. Like other species which habitually assemble in large flocks, it is capable of inflicting damage on farm crops. It shares with crows and blue jays a habit of pillaging the nests of small birds, but it does much good by destroying garden pests, especially white grubs, weevils, grasshoppers, and caterpillars.