Black-throated Blue Warbler (IMAGE) Cornell University Caption Black-throated Blue Warbler, one of the study species. Credit Photo by Brian E. Kushner, Cornell Lab of Ornithology Usage Restrictions For use only with articles about this research. License Original 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.