There are 13 species of Darwin spinches

, also known as Galapagos finches, that are found in the Galapagos Islands. These finches are famous for their role in helping Charles Darwin develop his theory of evolution by natural selection. Each species has its own unique beak shape and size, which allows them to specialize in feeding on different types of food sources. The diversification of these finches on the isolated islands provided strong evidence for the process of adaptive radiation.