Figure 3. Diversification of Beak Morphology (image) Uppsala University Share Print E-Mail Caption The most characteristic feature of Darwin's finches is the diversification of beak morphology that has allowed these species to expand their utilization of food resources in Galápagos, here illustrated by the gray warbler finch (Certhidea fusca) that has a small, pointed beak and feeds on insects, the common cactus finch (Geospiza scandens) that has a large, pointed beak and feeds on medium size seeds and cactus pollen and the large ground finch (Geospiza magnirostris) that has a large, blunt beak and feeds on large seeds. Credit © B. Rosemary Grant. Usage Restrictions May only be published in connection to reports about the research by Lamichhaney et al. Share Print E-Mail 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.