The Grants have focused their research on the medium ground finch, Geospiza fortis, on the small island of Daphne Major. Daphne Major serves as an ideal site for research because the finches have ...

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.