Common Cactus Finch (IMAGE) Uppsala University Caption Common cactus finch with its pointed beak feeding on the Opuntia cactus. Credit Lukas Keller Usage Restrictions May only be published in connection to reports about the research published in "Female-biased gene flow between two species of Darwin's finches" or after permission from the photographer. 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.