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Haemosporidian parasites of birds are geographically widespread, have been detected in a phylogenetically diverse array of hosts, and have been the focus of extensive research due to both their impacts on birds and their similarity to vector-borne diseases of humans. Advances in molecular diagnostic tools have created a greater awareness of the genetic diversity of haemosporidian infections. Yet in spite of their more or less global distribution, comparatively little is known about the haemosporidians affecting birds in Australia. We screened blood from 889 birds (23 species) for haemosporidian blood parasite infections during the 2019 breeding season at Brookfield Conservation Park, South Australia. We examined the genetic (lineage) diversity of haemosporidian infections in this behaviourally and ecologically diverse host assemblage and examined the congruence between parasite and host phylogenies. We identified seven  Haemoproteus  mitochondrial cytochrome  b  lineages, five of which were novel. Four birds had simultaneous co-infections by two  Haemoproteus  lineages each. The  Haemoproteus  lineages clustered at the host family level. Two  Plasmodium  lineages were also identified, each of which had been previously detected in different avian host species in Australasia. We did not detect any Leucocytozoon infections in our sample. This study supplies critical baseline data on host–parasite associations in a poorly-surveyed geographic region.

Haemosporidian parasite diversity in an under-surveyed Australian avifauna