Several years ago, my hubby and I went to Chicago (he's from there) and he took me to Volo Bog. At some point during our lovely walk around it, we ran into a swarm of deerfly (he says that's what they were). Anyway... OUCH! He wanted to take a photo of me being swarmed. No thank you... that's a memory I'd rather not have in detail (I remember enough, thank you) I could've punched his lights out for holding me up that long (and wanting to take a photo while I was in such pain) while I was just wanting to get out of there. I felt those things bite through my clothes! Eek!