The Grants have focused their research on the medium ground finch, Geospiza fortis, on the small island of Daphne ... Medium ground finches are variable in size and shape, which makes them a ...

One of the differences between house finches and purple finches is size ... finches have a small bill with a distinctive ...

On various islands, finch species have become adapted for different diets: seeds, insects, flowers, the blood of seabirds, and leaves. The ancestral finch was a ground-dwelling, seed-eating finch.

Relative to their body size, Large Ground-finches have ... demonstrated that Darwin's finches no longer recognize the songs of conspecifics whose beak shape has evolved due to ecological adaptation.