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Figure 3. Diversification of beak morphology
The most characteristic feature of Darwin’s finches is the diversification of beak morphology that has allowed these species to expand their utilization of food resources in Galápagos, here illustrated by the gray warbler finch (Certhidea fusca), the common cactus finch (Geospiza scandens) and the large ground finch (Geospiza magnirostris).
© B. Rosemary Grant
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