The songs a bird sings while dreaming have been revealed for the first time. Researchers at the University of Buenos Aires created a way to track the vocal muscle activity of birds as they sleep, and ...

A European robin, Erithacus rubecula, sings in a tree in Norfolk, England. Studies have linked the sound of birdsong to reduced levels of depression and anxiety. Photograph By David Tipling, Nature ...

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 ...