Backyard feeders changed the shape of hummingbird beaks, scientists say
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.
(Image credit: ROBYN BECK/AFP via Getty Images)
