In his memoir, The Voyage of the Beagle, Darwin noted, almost as if in awe, "One might really fancy that, from an original paucity of birds in this archipelago, one species had been taken and ...

and identify hundreds of small birds and record their diets of seeds. But for the Grants, the rewards have been great: They have done nothing less than witness Darwin's theory of evolution unfold ...

These findings suggest that, because of the links between beaks and song, an entirely new species of Darwin's medium ground finches could evolve in response to six major Galapagos droughts.

The finches in the above video were collected from the Galápagos Islands in 1835 by Charles Darwin and his colleagues during the second voyage of HMS Beagle (1831-1836). The different finch species on ...