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Acknowledgements I am grateful to many people <strong>for</strong> making possible this publication on <strong>Barrier</strong> <strong>Design</strong>. First I would like to thank Shri S. C. Sharma, Addl. DGF (WL), MOEF (Retd.) and Shri P. R. Sinha, Director, Wildlife Institute of India, Dr. B. R. Sharma, Member Secretary, Central <strong>Zoo</strong> Authority, Shri S. K. Patnaik, Retd. Addl Principal Chief Conservator of Forests (Wildlife), Orissa, Dr. L. N. Acharjyo and Ms. Sally Walker, who encouraged this writing and publication of this manual. Dr. Jon Coe, Landscape Architect <strong>for</strong> editing the earlier draft of the guidelines, Mr. Adit Pal and Mr. Bernard Harrison <strong>for</strong> providing detailed illustrations without whom it would have not been possible to bring out this publication. I would also like to acknowledge with thanks the intellectual guidance provided by the Shri T. Ramakrishna, Retd. Principal Chief Conservator of Forests. Andhra Pradesh. I would also like to thank the following <strong>for</strong> their contribution to the data and comments: Shri A. V. Joseph, Additional Principal Chief Conservator of Forests (Wildlife), Andhra Pradesh; Shri K. N. Banerjee, Ex. Curator, Nehru <strong>Zoo</strong>logical Park, Hyderabad; Dr. N. Krishna Kumar, Ex. Director, Arignar Anna <strong>Zoo</strong>logical Park, Chennai; Dr. E. Narshimulu, Ex. Curator, Sri Venkateswara <strong>Zoo</strong>logical Park, Tirupati; Shri Sanjeev Kumar Gupta, Ex Curator, Indira Gandhi <strong>Zoo</strong>logical Park, Vishakhapatnam; Shri D.N. Singh Director, National <strong>Zoo</strong>logical Park, New Delhi; Shri R. Bhattacharjee, Ex DFO, Assam State <strong>Zoo</strong>, Guwahati; Shri G. P. Sharma, Ex Director, Prince of Wales <strong>Zoo</strong>logical Gardens, Lucknow, Dr. A Dubey, Ex Veterinary Officer, Kanpur <strong>Zoo</strong>, Kanpur. Last but not the least, this publication could not have been written without the support of my parents, family members particularly my wife. Thanks are also due to Shri Bipul Chakrabarty <strong>for</strong> guidance and Shri Vivek Goel, Data Processing Assistant, CZA <strong>for</strong> help in data analysis. Thanks are also due to Madhu Bala Pramod Kumar Jha, Gopal Swamy and Thakur Das <strong>for</strong> their help in locating the files and xerox works. ix