The broadcaster and biologist explores the ways different creatures hear and produce sound and how it can influence their decisions, using cutting-edge audio technology to reveal a new perspective and understanding of animal behaviour.
From melodic songs to strange hums, David Attenborough shares the sounds that gibbons, lyrebirds, bull elk and more use to find a mate - and warn off the competition.
A look at how baby animals communicate in their quest for survival, using sound to beg and call for help in the early days of life.
