Charles Darwin observed a variety of finches of different beak shapes on

Galapagos Islands are located in the Pacific Ocean off the coast of Ecuador. In 1835, Darwin spent several weeks exploring Galapagos Islands as part of a scientific expedition aboard the HMS Beagle. During his visit, Darwin made a number of important observations that would later form the basis for his theory of evolution by natural selection. For example, he observed that the finches on the islands had different beak shapes, which corresponded to their different diets. Darwin's observations in the Galapagos Islands helped him develop his ideas about how species could change over time through natural selection.