I have been bitten by March flies before, some have no blood come out, some have alittle. While I was about to kill a Mosquito on my shin I saw this guy on my side of my leg. So I hit it and BOOM. The blood splashed out everywhere. It covered two fingers completely not to mention on my leg but also on the flies eye and legs as you can see in the image. Never seen so much blood come out of one fly.