Answer: Birds
Notes: Darwin’s finches are a group of about 15 species of passerine birds. They often are classified as the subfamily Geospizinae or tribe Geospizini. They were first collected by Charles Darwin on the Galápagos Islands during the second voyage of the H.M.S. Beagle. All are found only on the Galápagos Islands. The birds vary in size from 10 to 20 cm and weigh between 8 and 38 grams. The smallest are the warbler-finches and the largest is the Vegetarian Finch. The most important differences between species are in the size and shape of their beaks, that are highly adapted to different food sources available on island.
