Most birds have distinct calls that tend to stay the same. It’s how birders can recognize a species without seeing it. But new research shows these tunes can change. Over the course of two decades, ...

The sound of birds singing is synonymous with spring. As delightful as the tweets and chirps may be, these songs are actually tied to the birds’ survival — and a combination of day length, sunlight ...

New research from scientists at the Centre for Ecological Research in Hungary finds that some birds living in cities are ...

Each spring, birds across America are in full voice. Cardinals chatter, sparrows sing and warblers warble. Birdsong lifts the human spirit – “‘Hope’ is the thing with feathers,” after all. Yet birds ...

Not all birds sing, but those that do — some several thousand species — do it a lot. All over the world, as soon as light filters over the horizon, songbirds launch their serenades. They sing to ...

Source: Kentish Plumber, via Flickr. Distributed under a CC BY-NC-ND 2.0 license. Songbirds seem to enjoy singing. And while a great deal of research has investigated the development and production of ...

A mid-August walk finds the woods almost silent. A raven talks, a jay complains, an eagle titters, a squirrel chatters. If you are lucky, a little group of chickadees will come by and visit. But bird ...