Under these drastically changing conditions, the struggle to survive favored the larger birds with deep, strong beaks for opening the hard seeds. Smaller finches with less-powerful beaks perished.

A bird beak is the most important resource it has, and every species has one solely designed for survival. Birds use beaks ...

How fast does the beak move? To answer these questions, I’m recording high-speed X-ray videos of the feeding birds. Interestingly, I discovered some fascinating differences in beak movement ...