Mammalogy is the study of mammals from the diverse biological viewpoints of structure, function, evolutionary history, behavior, ecology, classification, and economics.  Newly revised and updated, the fifth edition of Mammalogy aims to explain and clarify the subject as a unified whole.   In recent years we have witnessed significant changes in the taxonomy of mammals.  The authors have kept pace with such changes in the field and have revised each chapter reflect the most current data available.  New pedagogical elements, including chapter outlines, further reading sections, and questions for discussion, help readers grasp key concepts and explore additional content on their own.  Two new chapters on domestication and mammal diseases are available on the Mammalogy companion website.