Parasite communities on islands are assembled through multiple immigrations and/or in‐situ diversification. In this study, we used a phylogenetic approach to investigate the role of such processes in shaping current patterns of diversity in Leucocytozoon , a group of haemosporidian blood parasites infecting whites eyes ( Zosterops ) endemic to the Mascarene archipelago (south‐western Indian Ocean). We found that this parasite...