The Indigo Bunting (Passerina cyanea) is a small seed-eating bird in the family Cardinalidae.
Adult males have deep blue plumage and the wing and tail are black with blue edges. Adult females are brown, darker on the upperparts, faintly streaked underneath.
Their breeding habitat is brushy edges across eastern North America and the southwest United States. They nest low to the ground in dense shrub or a low tree. These birds are monogamous but not always faithful to their partner. In the western part of their range, they often hybridize with the Lazuli Bunting.
They migrate to southern Mexico, the West Indies and Central America. They also occur in Western Europe on rare occasions.
These birds forage on the ground or in trees or shrubs. They mainly eat insects and seeds. In winter, they often feed in flocks.
The song of this bird is a high-pitched buzzed sweet-sweet chew-chew sweet-sweet.