This book presents an overview of selected topics in comparative cognition, which is the study of behaviour and mental activities in nonhuman animals. Human psychological capacities are often used as a heuristic by comparative cognitive scientists, whose tasks include designing valid procedures for studying species’ sensory, linguistic or manipulatory abilities that differ from those of humans. Nonetheless, researchers have developed many original ways to gain insights into how other species perceive the world, store and integrate information, and communicate.  The contributors to this book have all been involved in such work, and will present some of the approaches that have led to clear advances in our understanding of cognitive processes in other species. The chapters integrate a review of past literature with recent work, covering a variety of subject species including birds, domestic dogs and cats, and nonhuman primates. All contributors have worked with or been otherwise influenced by Professor Kazuo Fujita, to whom the volume will be dedicated. Fujita openness to research on various topics and species is reflected in the diversity of the chapters presented. The book will be of interest to students and more experienced researchers in diverse fields including psychology, anthropology, biology and veterinary studies.