WHippoboscidae
WCrataerina
WCrataerina pallida
WHippobosca
WHippobosca equina
WIcosta
WLipoptena
WLipoptena cervi
WLipopteninae
WMelophagus
WMelophagus ovinus
WOlfersia (fly)
WOrnithomya
WOrnithomya avicularia
WOrnithomya fringillina
WOrnithomyinae
WPseudolynchia
WPseudolynchia canariensis
WStenepteryx