The Medium Ground Finch (IMAGE) Princeton University Caption The medium ground finch (Geospiza fortis) is on Daphne Major Island, Galápagos archipelago. Credit Photo B.R. Grant, Department of Ecology and Evolutionary Biology. Reproduced with the permission of Princeton University Press. Usage Restrictions Photo B.R. Grant, Department of Ecology and Evolutionary Biology. Reproduced with the permission of Princeton University Press. 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.