Ronald Weisman is a professor emeritus of psychology and biology at Queen’s University in Kingston, Ontario, where he was on the faculty for 36 years. He received his Ph.D. with a concentration in comparative psychology from Michigan State University in 1964. He is the author of 90 articles and book chapters about animal cognition and evolution and continues to conduct research on songbird communication and the evolution of pitch perception. Address: Department of Psychology, Queen’s University, Kingston, ON, K7K 3N6, Canada. Internet: ron@psyc.queensu.ca