The Daniel S. Lehrman Memorial Symposia Series will publish the proceedings of symposia devoted to the evolution, development, and organization of behavior. These various symposia will bring together at intervals scientists studying problems from each of these view- points. The aim is to attempt to integrate our knowledge derived from these different sources and to familiarize scientists working on similar behavior patterns with the work of their colleagues in related fields of study. Each volume, therefore, will be devoted to a specific topic in the field of animal behavior, which will be...