The maleâs feathers are black from beak to foot, while the female large ground finchâs plumage is brown with streaks. A large Galápagos finch with a bulky bill. The Medium Ground Finch has the advantage of both sides, and whatever weather comes, they have adapted and are prepared for the worst. However, with the Medium and Large Ground Finch, they can easily digest these seeds. Large ground finch (Geospiza magnirostris). CALLS AND SONGS: SOUNDS BY XENO-CANTO The Large Cactus-Finchâs calls include high-pitched âtzeeeeeeâ. There are individuals that have lived for 27 years. Medium ground finch (Geospiza fortis). Name: Large Ground Finch Family: Thraupidae Scientific Name: Geospiza magnirostris Length: 16 cm Weight: 27-39 g Category: Darwin Finches Number of Species: 13 Endemic Species: 13 Darwin Finches, or Galapagos Finches, are small land birds with generally dull black, brown or olive, often streaky, plumage; short tails; and short, rounded wings. Most finches live for around 5-10 years, but can live longer with proper care. The Medium Ground Finch mostly feeds on seeds, but it also eats flowers, buds, and, occasionally, insects. Bill is black on breeding male and dull orange on female and nonbreeding male. The largest of Darwinâs finches both in size and beak size. Bill typically appears bulbous, showing a ridge along the upper edge that juts up where it meets the crown feathers. The Large Cactus-Finch frequents the arid lowlands with dry scrub, and the areas with cacti of genus Opuntia helleri. They have large, short beaks for cracking large seeds and nuts. Least Concern. At deeper levels in the Darwin's finch phylogeny, niche differences are often large and relatively consistent through space and time: the ground finches (Geospiza spp.) These finches are found on a number of the islands and feed mainly on seeds. The large ground finch (Geospiza magnirostris) is a species of bird.One of Darwin's finches, it is now placed in the family Thraupidae and was formerly in the Emberizidae.It is endemic to the Galapagos Islands, and is found in the arid zone of most of the archipelago, though it is absent from the southeastern islands (Floreana, Española, San Cristóbal and Santa Fé). state two reasons why the large ground finch and sharp billed ground finch could live on the same island but not compete for food, even though they both eat mainly plant food - different beak structures - eat different types of plants. Finches as pets Housing & cage requirements. The Galapagos is well known to be the home of many strange and unusual creatures. This bird is often seen on the ground. Lifespan: How long do finches live. typically feed on seeds, the tree finches (Camarhynchus spp.) On various islands, finch species have become adapted for different diets: seeds, insects, flowers, the blood of seabirds, and leaves. The ancestral finch was a ground-dwelling, seed-eating finch. The Large Ground Finch is the largest of the thirteen Galapagos species, and also has the largest beak, which it uses to good effect cracking open nuts. Least Concern. The song is a double nasal note âchâwhuuu châwhuuuâ or âtcheu tcheuuuâ. Name: Large Ground Finch Family: Thraupidae Scientific Name: Geospiza magnirostris Length: 16 cm Weight: 27-39 g Category: Darwin Finches Number of Species: 13 Endemic Species: 13. Adult maleâs plumage is sooty-black; female is brown with paler underparts that are streaked with gray. One of the most interesting animals is the vampire finch (Geospiza difficilis septentrionalis).This unusual bird is a subspecies of the sharp-beaked ground finch that lives on Darwin and Wolf Islands and has some striking behavioural differences from other sharp-beaked ground finches.