Humble Bee Films Ltd, Infield Fly Productions, Sky Nature, Netflix, Canadian Broadcasting Corporation and Abacus Media Rights

For some animals, sound is key to survival. They use sound to hunt, to defend themselves, and to escape. With supersensitive ears, great grey owls can detect voles beneath a foot of snow, while kangaroo rats hear rattle snakes in the dark and defend themselves by foot drumming. Sound can make the difference between life and death.

Sound is the vocabulary of nature. It plays a crucial role in the lives and everyday struggles of animals around the globe - from birth to surviving adulthood and finding a mate. In this ground-breaking series, David Attenborough explores the extraordinary ways that animals hear and produce sound, and how it influences the decisions they make.

The Secret World of Sound used cutting-edge audio technology to reveal new perspectives and understanding of animal behaviour.