Eastern Bluebirds (IMAGE) Cornell University Caption Eastern Bluebirds may be ousted from their cavity nests by non-native species. Credit Judy Lyle, courtesy Cornell Lab of Ornithology Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.