Sex-related Features of Darwinopterus (IMAGE) University of Leicester Caption This graphic shows the sex-related features of Darwinopterus. The male (right) has a large head crest, but this is absent in the female (left). Credit Mark Witton (mark.witton@port.ac.uk). Usage Restrictions Use only with credit. 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.