The age-old dream of man is to learn to understand the language of animals. Today, this fabulous task is solved by bioacoustics - the science of sound communication of living beings. "Speaking" birds, riddles of hearing and voice of the dolphin, singing fish of the Amazon, the language of wolves, the conversation of man with a monkey, finally, the language of emotions of the "king of nature" - man - these and many other curious, sometimes surprising facts, recently discovered by scientists-bioacoustics, consider the author. The book tells how a person uses knowledge of the language of animals to control their behavior. The book is illustrated by . At the All-Union competition for the best popular scientific works of the series "Science and Progress" in 1981-1982 . She was awarded the . For a wide range of readers.