The Galapagos Islands are home to 14 species of
differing mainly on their beaks, which are adapted for specific diets.
Darwin hypothesized that the different birds evolved from a common ancestor:
descent with modification.
- The long beak of the cactus finch helps it tear and eat cactus flowers and pulp.
- The warbler finch uses its narrow beak to grasp insects.
- The large ground finch has a large beak adapted for cracking seeds.