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Darwin's finches are a group of black birds that were found on the Galapagos island, they represent one of the best examples for the process of adaptive radiation. Darwin went to Galapagos Islands where he observed the diversity among the birds. He realised that there were many varieties of finches in the same island. All the varieties, evolved on the island itself. From the original seed-eating features, many other forms with altered beaks arose, enabling them to become insectivorous and vegetarian finches.