This encyclopedia, reflecting one of the fastest growing fields in evolutionary psychology, is a comprehensive examination of the key areas in animal cognition. It will serve as a complementary resource to the handbooks and journals that have emerged in the last decade on this topic, and will be a useful resource for student and researcher alike. With comprehensive coverage of this field, key concepts will be explored. These include social cognition, prey and predator detection, habitat selection, mating and parenting, learning and perception. Attention is also given to animal-human co-evolution and interaction, as well as metacognition and consciousness. Entries are tailored to the importance of the individual topic and the amount of empirical evidence that is available. All entries are under the purview of acknowledged experts in the field.