Because of the scope of conservation problems, biologists and managers often rely on 'surrogate' species to act as proxies to represent larger conservation issues. In "Conservation by Proxy", conservation biologist and field researcher Tim Caro offers systematic definitions of surrogate species concepts, explores the theories behind them, considers how surrogate species are chosen, examines evidence for and against their utility, and makes recommendations for their continued use. "Conservation by Proxy" is a benchmark reference that provides clear definitions and common understanding of the evidence and theory behind surrogate species. It is the first book to review and bring together literature on more than fifteen types of surrogate species, enabling us to assess their role in conservation and offering guidelines on how they can be used most effectively.