The indigo bunting communicates through vocalizations and visual cues. Indigo bunting and blue grosbeak are also common. The indigo bunting is a small bird, with a length of . The indigo bunting often migrates during the night, using the stars to navigate. The indigo bunting forages for food on the ground or in trees or shrubs. The indigo bunting is a smallish songbird, around the size of a small sparrow. The indigo bunting does not drink frequently, generally obtaining sufficient water from its diet.