Darwin's finches evolved from a/an

Darwin's finches comprise a group of 15 species endemic to the Galápagos (14 species) and Cocos (1 species) Islands in the Pacific Ocean. The group is monophyletic and originated from an ancestral species that reached the Galápagos Archipelago from Central or South America. This ancestral species had likely been a seed-eating species that arrived on the islands around 2 million years ago.