The Grants study the evolution of Darwin's finches on the Galapagos Islands ... The Grants have focused their research on the medium ground finch, Geospiza fortis, on the small island of Daphne ...

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.

How do you know that finches' beak depth is heritable? You can see from Figure 2 that there is a correlation between the parents' and offsprings' beak size. How did the finch population change ...

The thinnest beak belongs to the green warbler finch which uses it to probe for insects. The massive, stout beak of the large ground finch enables it to crush big hard seeds. The long pointed beak of ...

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.