Table of Contents

1. Acknowledgements; 2. 1. Introduction; 3. 2. Overview of biological signal systems; 4. 3. Human language - its use and learning; 5. 4. Human nonverbal communication; 6. 5. Our closest relatives - nonhuman primates; 7. 6. Man's best friend - the dog; 8. 7. Communication in birds; 9. 8. Discussion and outlook - why language?; 10. Glossary; 11. References; 12. Index