In these autobiographical essays by pioneers in the field of animal behavior, the authors discuss childhood, education, moments of discovery, and the attractions of the research that each pursued. The field of animal behavior has been interdisciplinary throughout its history, and the two psychologists and seventeen biologists in Donald Dewsbury\'s collection provide a fascinating assortment of backgrounds and interests. Chosen by a panel of seven distinguished animal behaviorists, the men whose essays are collected here include two Nobel Prize winners and one Pulitzer Prize winner. All provide unique accounts of the development of the field written by its original leading practitioners.