Darwin studied the physical variation in finches living on different islands of the galapagos.Among other attributes,he studied beak shape,which varied from island to island. Eventually,Darwin related each beak shape to diet, especially to the texture of food and how the food was acquired.Finches with larger beaks typically consumed harder foods,such as seeds and nuts,while finches with smaller beaks ate softer foods,such as berries.Darwin concluded that each finch species had adapted to the particular environment and food resources of its island.