We analysed the distribution of Zygaena Fabricius, 1775 moths on Čavljak and mountains: Bjelašnica, Igman and Trebević. Five different Zygaena species were found on investigated sites: Zygaenaviciae Denis & Schiffermuller, 1775, Z. filipendulae Linnaeus, 1758, Z. lonicerae Scheven, 1777, Z. purpuralis Brünnich, 1763 and Z. loti Denis & Schiffermüller, 1775. Simpson's diversity index was calculated based on the collected species and their population density
by which we determined that Mtn.Igman was the locality with the highest species richness.
Bray-Curtis cluster analysis was used to show that Mtn.Bjelašnica and Čavljak are the most similar localities in terms of the species that inhabit them.