So the adaptation to a changed environment led to a larger-beaked finch population in the following generation. Adaptation can go either way, of course. As the Grants later found, unusually rainy ...

Photographer Thomas P Peschak had the rare opportunity to visit the island and witness the blood-drinking behaviour of these sharp-beaked birds ... survival on Wolf Island is tougher for the ground ...

For example, the cactus finch has a long beak that reaches into blossoms, the ground finch has a short beak adapted for eating seeds buried under the soil, and the tree finch has a parrot-shaped ...

Scrambling over loose rocks to reach this plateau, he spied a bizarre scene – pecking away at the flight feathers of a Nazca booby was a sharp-beaked ground finch. With scarce food alternatives, it ...