Examines the social, cognitive, and ecological processes underlying patterns and strategies of group travel in primates and other animals. Chapters discuss how factors such as group size, resource distribution and availability, the costs of travel, predation, social cohesion, and cognitive skills affect how individuals as well as social groups exploit their environment. Most chapters concentrate on human and non-human primate groups, but chapters covering travel in hyenas, birds, dolphins, and bees provide a broad taxonomic perspective and offer new insights into comparative questions.