Well my deer season is over this season, i got my last 2 does Saturday morning. I'm friends with a TPWD biologist and i give her the lymph nodes of the deer I shoot. Well, this was a first for me. I felt a little bulge around the top of the mouth and cut it open. these nasty things spilled out. the other doe had them as well.
I called her and she said they are bot flies and harmless. this was just a different experience for me but they look like they would make great fishing bait.