Darwin's Finches: A diagram depicting the adaptive radiation of finch species on the Galápagos Islands, highlighting the relationship between beak morphology and dietary specialization.

Diagram illustrating Darwin's finches, showing different species (Platyspiza crassirostris, Cactospiza pallidus, Certhidea olivacea, Geospiza scandens, Geospiza fortis) with their corresponding beak shapes and diets, including buds, leaves, fruit, insects, larvae, cactus, and seeds.