Dryolimnas Rail Flightless vs. Flighted (IMAGE) University of Portsmouth Caption Wing bones fossils of flighted (right) and flightless Dryolimnas rails. Credit Dr Julian Hume. 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.