The Large Cactus-Finch is one of the “ground-finch” group of Darwin’s Finches. Within the ground finches those that are slightly longer billed are called cactus-finches, although the division may be false. The two cactus-finches do not appear to be most closely related to each other, and in fact the three disparate and rather different looking populations of the Large Cactus-Finch may not be even each other’s closest relatives. In other words more than one species may be recognized in the future from the Large Cactus-Finch. These finches have large to massive (conirostris of Española Island) and are specialists on large and hard seeds; they are found on low islands with dry thorny brush habitats.