The Galapagos Islands are home to 14 species of finches; differing mainly on their beaks, which are adapted for specific diets.

  • 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.

    Darwin hypothesized that the different birds evolved from a common ancestor: descent with modification.