Depending on the region, bluebirds may be year-round residents, or they may migrate south for the winter. The majority of bluebirds that migrate do so in late fall, with some birds traveling as far south as Central America. While on their wintering grounds, these birds form small flocks and can often be seen perching in trees or bushes. In some cases, however, bluebirds may remain in their northern homes throughout the winter if conditions are favorable.