Aspects of the behavior, ecology and morphology of hilltopping and nonhilltopping individuals of the butterfly Hyalites encedon encedon (L.) were compared.  H. e. encedon showed two behavioural strategies: a ‘perching’ strategy on the hilltop and ‘patrolling’ stategy on the surrounding flatlands.  There were no significant differences in the density and morphology of hilltopping and non-hilltopping individuals.  Hilltopping in this species is associated with mating, and not with oviposition, nor feeding.  Hilltopping is more likely to occur late in an adult male’s life cycle.