Resident to medium-distance migrant. Some Western Bluebirds even as far north as British Columbia, Canada, stay there year-round. Bluebirds in mountainous areas may simply move down the slope to warmer elevations for winter. Others across the interior West depart their breeding grounds, and wintering birds begin to be seen in Arizona, west Texas, and northern Mexico by October and November. Unlike many songbirds, Western Bluebirds often migrate during the day.