Underlying Drivers graphic (IMAGE) Cornell University Caption High or medium-impact threats affecting five globally threatened bird species and the underlying drivers of these threats. Credit Data from BirdLife International. Graphic courtesy Lees et. al. Annual Review of Environment and Resources, May 2022. Usage Restrictions Only for use 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.