The Common Grackle, Quiscalus quiscula, is a large icterid.

The 32 cm long adult has a long dark bill, a pale yellowish eye and a long tail; its plumage is an iridescent black, or purple on the head. The adult female is slightly smaller and less glossy.

The breeding habitat is open and semi-open areas across North America east of the Rocky Mountains. The nest is a well-concealed cup in dense trees (particularly pine) or shrubs, usually near water; sometimes, the Common Grackle will nest in cavities or in man-made structures. It often nests in colonies, some being quite large.

This bird is a permanent resident in much of its range. Northern birds migrate in flocks to the southeastern United States.

The Common Grackle forages on the ground, in shallow water or in shrubs; it will steal food from other birds. It is omnivorous, eating insects, minnows, frogs, eggs, berries, seeds, grain and even small birds.

This bird's song is particularly harsh, especially when these birds, in a flock, are calling.

The range of this bird expanded west as forests were cleared. In some areas, it is now considered a pest by farmers because of their large numbers and fondness for grain.