A new study details the evolutionary change of Anna's Hummingbirds, finding their beaks have grown longer and more tapered to get the most from common feeders.

We have found, however, that this incredible diversity is underpinned by a hidden mathematical rule that governs the growth and shape of beaks in nearly all living birds.

A new study suggests the use and prevalence of hummingbird feeders — like those red and clear plastic ones filled with homemade sugar water — changed the size and shape of the birds' beaks.

Bird beaks come in almost every shape and size – from the straw-like beak of a hummingbird to the slicing, knife-like beak of an eagle. We have found, however, that this incredible diversity is ...

A new study details the evolutionary change of Anna's Hummingbirds, finding their beaks have grown longer and more tapered to get the most from common feeders.

A new study details the evolutionary change of Anna's Hummingbirds, finding their beaks have grown longer and more tapered to get the most from common feeders.