Finch Drawing (IMAGE) University of Bristol Caption Main coordinated changes in both the shape of the beak and the shape of the skull found in the study to have characterized the evolution of the skull in both Darwin's finches and Hawaiian honeycreepers. Drawings of some of the species representing the extremes of skull shape. Credit Guillermo Navalon Usage Restrictions The image is for single use only, should be credited and should not be archived. 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.