Due to the rising human population, deforestation, pollution and degradation of ecosystem, many species are becoming endangered. These animals are categorized as likely to become extinct and thus, need to be preserved. Captive breeding is the most commonly practiced method for the conservation of endangered species. This book aims to shed light on some of the unexplored aspects of endangered species. The topics covered in it deal with the core topics of the area. In this textbook, constant effort has been made to make the understanding of the difficult concepts as easy and informative as possible, for the readers.