I am a taxidermist and while caping and skinning most deer out i find fly larvae in their inner ears and nasal cavities. When they hatch in the noseyou willusually see and hear deer sneezing constantly. I had a doe two years ago walk by my stand sneezing and snorting like crazy so I kind of watched her for a while then later in the day when she came back I shot her and proved my theory.I put them in a jar and everyday one or two hatched. They seemed to be the oneswith the shinny green bodys. Also, when Imount caribou 99% of the hides have the bot fly larvea embeded in the emidermis of the hide (some nasty buggers those things are)