Various accounts of aggregation by amphibians are scattered throughout the herpetological literature. While an aggregate may be considered any statistically improbable cluster of animals, aggregates vary greatly in the mean spatial distance between individuals and in their mechanism and reason of formation. Social aggregates (Bragg, 1954) are comprised of individuals responding solely to the presence of conspecifics, whereas "asocial" aggregates result from individuals responding to external stimuli other than conspecifics. Social aggregations commonly occur in a variety of anuran larvae (see Wassersug, 1973 for summary of literature) but are far less common in postmetamorphic, nonreproductive frogs. We here report an instance of postmetamorphic [...]