In this book, the editors bring together results from studies on all kinds of animals to show how thinking on many behaviors as truly cognitive processes can help us to understand the biology involved. Taking ideas and observations from the while range of research into animal behavior leads to unexpected and stimulating ideas. A space is created where the work of field ecologists, evolutionary ecologists and experimental psychologists can interact and contribute to a greater understanding of complex animal behavior, and to the development of a new and coherent field of study.