""Leks are among the greatest wonders of the natural world. These aggregations of displaying male birds, mammals, and (by some definitions) insects, apparently existing solely as mating arenas where females come, mate with one or more highly popular males, and leave having obtained nothing more than sperm to fertilize their offspring, have captivated naturalists for centuries. Hoglund and Alatalo, experts in avian behavior and sexual selection, attempt to answer these questions and to place lekking systems in a broad context of sexual selection theory.""--Science