A group of songbirds related to the buntings and found on the Galapagos Islands, discovered by Charles Darwin and used by him to illustrate his theory of natural selection. They are believed to have evolved from a common ancestor and have developed a variety of bills to suit various modes of life. Also called Galapagos finches.
- Family Emberizidae (subfamily Emberizinae): four to six genera, especially Geospiza (the ground finches) and Camarhynchus (the tree finches).
- Podos realized that among Darwin's finches, the varieties of this trade-off and the natural variability of beak shape could enable him to test whether a bird's song could indicate the bird's ability to eat hard seeds.
- Archipelagoes are well known as arenas for species radiations (e.g. Darwin's finches, Hawaiian honeycreepers).
- Just as bills of Darwin's finches vary from island to island within the Galapagos, so, too, do bills of male and female purple-throats vary from island to island in the Lesser Antilles.
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