Bat flies are members of the insect order Diptera, the true flies, which are external parasites of bats. Two families of flies are exclusively bat flies: Nycteribiidae and Streblidae.[1] Bat flies have a cosmopolitan distribution, meaning that they are found around the world.[2] Nycteribiidae and Streblidae are members of the superfamilyHippoboscoidea, along with the families Hippoboscidae and Glossinidae.[3]
^Morse, Solon F.; Olival, Kevin J.; Kosoy, Michael; Billeter, Sarah; Patterson, Bruce D.; Dick, Carl W.; Dittmar, Katharina (2012). "Global distribution and genetic diversity of Bartonella in bat flies (Hippoboscoidea, Streblidae, Nycteribiidae)". Infection, Genetics and Evolution. 12 (8): 1717–1723. doi:10.1016/j.meegid.2012.06.009. PMID22771358.