Tephritid fruit flies have a large diversity of co-occurring RNA viruses

•34 putative RNA viruses of 8 families found across 9 tephritid fruit fly species.•Most common are Dicistroviridae and Iflaviridae.•Diagnostic tools for 4 viruses.•High prevalence and co-occurrence in laboratory and field flies.•Focus on Queensland fruit fly, host of a cytoplasmic inclusion virus and QFFV.