Advances in the Study of Behavior, Volume 55 highlights new advances in the field, with this new volume presenting interesting chapters on Playing to the crowd: using Drosophila to dissect mechanisms underlying plastic male strategies in sperm competition games, Social breeding and its challenges: A case study on village weaverbirds, Inbreeding depression and social interactions, Sleeping beauties? Copulatory quiescence in arachnid females, and more.