This book is an outcome of research work carried out for three years in the Department of Zoology, School of life sciences, Yogi Vemana University, Kadapa, Andhra Pradesh, India. This book encompasses 5 chapters. Chapter I deal with the taxonomy of Papilionids and its behavior, adaptations, significance and its conservation. Chapter II covers with literature and diversity of Papilionids. Chapter III & IV deals with methodology, life cycle parameters, food energetics and detaileddiscussion. This book can be good foundation for future endeavors to build upon these results for development of Papilionid butterfly conservation. Butterflies are the flying jewels used as a potential requirement for analytical studies by the ecologists across the globe concerning recent scenarios of Eco-biological and Biodiversitystudies.