UMass Amherst scientists reveal how pitch and volume interact in birdsong, offering new insights into bird communication and ...

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.

What I was hearing was a young male, born just a few months ago, learning to sing. About 60% of birds belong to a single order, the perching birds, or passerines. That order is split into two ...