Geospiza

Geospiza is a genus of Darwin's finches native to the Galápagos Islands, famous for their role in studying evolution. These small birds have evolved different beak shapes suited to their specific diets—some have large, strong beaks for cracking seeds, while others have slender beaks for catching insects. Their adaptive differences illustrate how species can change over time in response to their environment. Geospiza finches serve as a key example in understanding natural selection and evolutionary processes.