Contents: Preface. 1. Introduction. 2. Animal culture. 3. Communication among animals. 4. Patterns of behavior. 5. Social behavior. 6. Herd behavior. 7. Genetic behavior. 8. Animal biological clocks. 9. Animal nervous system. 10. Animal respiration system. 11. Animal muscular system. 12. Immune system. 13. Animal mating system. 14. Animal reproduction system. 15. Methods of studying behavior. Bibliography. Index. The present book obtains the mechanisms of animal behaviour, which is spread over in fifteen chapters viz. introduction, animal culture, communication among animals, pattern of behaviour, social behaviour, herd behaviour, animal biological clocks, animal nervous system, animal respiration system, animal muscular system, immune system, animal mating system, animal reproduction system and methods of studying behaviour. This book will be highly useful to the students, teachers and researchers of animal sciences, life sciences, zoology, veterinary and animal husbandry. It will be equally useful for behaviourist, behavioural ecologists and ecologist.