Facts about Galapagos Finches Evolutionary Study
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Hybrid offspring of two Galápagos finch species on Daphne Major were found to have higher survival rates during certain environmental conditions, demonstrating that hybridization can drive rapid evolution.
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Beak depth in medium ground finches on Daphne Major island measurably increased after a severe 1977 drought eliminated smaller, softer seeds from the environment.
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The 13 species of Galápagos finches are believed to have descended from a single ancestral finch species that arrived from South America millions of years ago.
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Charles Darwin's observations of beak variation among Galápagos finches during his 1835 voyage contributed to his development of the theory of natural selection.
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Peter and Rosemary Grant spent decades on the Galápagos Islands directly observing how beak size in Darwin's finches evolved in response to drought and food availability.