Kalmar "Gasterophilidae" tana nufin dangin kwari da aka fi sani da botflies ko doki bot flies. Suna cikin odar Diptera da Brachycera suborder. An san kwankwaso da salon rayuwar su ta parasitic, yayin da tsutsansu ke mamaye magudanar ciki na dabbobi masu shayarwa, musamman dawakai da jakuna. Larvae, wanda kuma ake kira bots, suna jingina kansu zuwa ga rufin ciki ko hanjin mai gida kuma suna ciyar da jinin mai gida da nama. Iyalin Gasterophilidae sun haɗa da nau'o'i da yawa, irin su Gasterophilus intestinalis da Gasterophilus nasalis, waɗanda aka sani suna mamaye nau'in equine.