This edited volume is the first of its kind to bridge the epistemological gap between primate ethologists and primate neurobiologists. Leading experts in several fields will review work ranging from primate foraging behavior to the neurophysiology of motor control, from vocal communication to the functions of the auditory cortex. This synthesis of the cognitive, ethological and neurobiological approaches to primate behavior will yield the richest understanding of our primate cousins to date and will shed light on the evolutionary development of human behavior and cognition.