This is because Georgia is a favorite winter home to thousands of bluebirds that migrate here from their breeding grounds far to the north. Here they intermingle with our resident bluebirds. When this happens, our bluebird population swells significantly. How much does it increase? A study conducted just south of Georgia offers some insight into this matter. Researchers in the Tallahassee area found that during the winter the local bluebird population in their study area increased 100 percent.