The unique bill morphologies of the Galapagos finches have b…
The unique bill morphologies of the Galapagos finches have been selected to utilize different foods. In some cases, this results in changes to morphology, when two species are brought together (sympatry). Here is a great example of such a change in Geospiza fortis and G. fuliginosa. The bill sizes in allopatry (separate) are similar, but when they live together their bills differ, thereby reducing competition for resources, is a good example of.