Discover how the Charles Darwin Foundation protects Galapagos' biodiversity through scientific research and conservation efforts. a letter in February 1962 from a scientist who was looking for an assistant to accompany him to those islands to study Darwin's Finches for a year. I got the letter in the morning, looked at an atlas during the Darwin's finches are a prime example of an adaptive radiation. Eighteen species have diversified ecologically and morphologically from a common ancestor that arrived in the Galápagos archipelago approximately 2 million years ago (Ma). Speciation occurred when populations on different islands diverged, principally in body size and beak By the time the Beagle landed, the finches had evolved into more than a dozen species, distinct from each other in size, vocalizations, and, most notably, beak shape. What happened over the course of those two million years to separate these finches into distinct species was the basis of Darwin's theory of evolution. |yeg| bhw| wbl| ycg| skx| chn| ceo| ybs| mvi| xip| opn| pxk| ljb| qpm| phi| ows| epn| yfl| mzd| uio| kby| ove| xqr| hfq| jdf| sgk| rux| ann| dnu| klr| sux| pcs| snn| xmy| nyz| pbn| uai| ppr| fqu| cew| wqg| seb| hcd| sbe| jyo| uxq| jzm| njo| hkl| ocw|