I zapped red headed fly the puts out a ***** worm. The fly looks for wounds then lays larva there where ***** worm develops heading toward your, or any other creatures, internal organs. The fly to a sheen to its' thorax area definitely has red head. The one I killed was about the size of House Fly. I took a picture of it with both phones this phone is paid up but on the other phone it got a better photo and I have not activated this other so I can't send that one. I shall try to remember to bring both phones to show this fly. The fly is ******* humans and other creatures. I killed inside my apartment.