Sir David Attenborough tunes in to the remarkable sounds of the natural world, an open-air festival of songs of sex and survival. But will they soon be heard no more? A new generation of scientists have discovered that animal song is not just the preserve of males. Females sing too. But there are also fears that we do not have much longer to hear them. Because as humankind gets noisier, the rest of the planet is falling silent. Joyous, surprising and poignant, this story of pioneering research and astounding insight is a chorus of wonder – and a wake-up call.