Ethologists and psychologists have traditionally taken different approaches to the study of animal behavior. Recently, there has been something of a rapprochement between these two schools of the study of behavior. The range of animals and the number of groups available in the zoo for comparison provide a wealth of topics for study by the behavioralist. At the same time, the new behavioralist is perfectly equipped to make important contributions to solving the problems that the zoo faces on a daily basis. Evidence provided by limited associations to date argues convincingly that more frequent and formal cooperation between the zoo and the behavioralist promises substantial mutual benefit.