The behaviour is the action, which changes the relationship between the animal and its environment, as no animal lives alone in the biosphere. Each comes in contact with other animals during its lifetime. Even those animals whose reproductive needs can be satisfied in solitude do not live alone. The behaviour is the action, which changes the relationship between the animal and its environment, as no animal lives alone in the biosphere. Each comes in contact with other animals during its lifetime. Even those animals whose reproductive needs can be satisfied in solitude do not live alone.

The second edition of the book has been prepared for the students taking their first course in Animal Behaviour and will provide an introductory treatment of entire domain of the subject. The book will prove as a learning tool for students in understanding the depth of the subject.