Darwin visited the galapagos islands several times. he observed some very unusual species. one species of bird, the finch, interested him. he observed some differences in the finches living on each of the islands. the finches had many traits in common; however, each had a different beak. some beaks were short, some long. some beaks looked straight, while others curved. darwin believed that each species of finch was related but had developed some special beak adaptations because there were different food sources on each island. what is the main idea of this paragraph? darwin likes finches. darwin observed that the finches had special adaptations. darwin travelled to different islands. finches are picky eaters.