This book discusses the diversity of insect species and numbers and their evolutionary associations. It illustrates the significance of insects through regional biodiversity, taxonomic biodiversity, tools and methods, and management and protection. The book examines the wide range of insect species worldwide and their evolutionary associations. It provides relevant case studies that assess how insect biodiversity may help address the needs of a quickly growing population. The book's conclusion is that a comprehensive understanding of insect biology and ecology is the only means to sustainably preserve ecosystems in a changing global environment. It discusses various topics about insects such as communication, locomotion, social behavior and their relationship to humans.