In this case, he chose drought as the ecological ... an entirely new species of Darwin's medium ground finches could evolve in response to six major Galapagos droughts. "Our research is not ...

Natural selection at its most powerful winnowed certain finches harshly during a severe drought in 1977. That year, the vegetation withered. Seeds of all kinds were scarce. The small, soft ones ...

The Grants study the evolution of Darwin's finches on the Galapagos Islands ... event that the Grants saw affect the food supply was a drought that occurred in 1977. For 551 days the islands ...

A close up of the large ground finch <i>Geospiza magnirostris</i> that competed for food with the medium ground finch <i>Geospiza fortis</i>, on Daphne Major Island during a severe drought.

Wolf Island, in the Galápagos, is remote and rarely visited. But this volcanic island is home to an unusual group of birds: vampire ground finches. Photographer Thomas P Peschak had the rare ...

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 ...

Their research has shown that natural selection is frequently at work in the Galápagos: After a drought, finches with larger beaks were able to eat tough seeds and survive; their offspring became ...