If you have been near the 7th hole in the last few weeks, I'm sure that you have seen a few of these nasty looking bugs hovering around the ground.  Don't let them scare you though, they are not wasps or hornets, they are called cicada killers.  They are not aggressive, and will only sting if you stepped on one or grabbed it out of the air, unless you are a cicada.  As the name suggests, they kill cicadas by stinging them and then dragging them back in to the burrows that they dig in the ground.  They tend to concentrate in that area of the course because they like to dig in sandy soil, and that area of the course is very sandy.  On other courses that do not have sandy soil areas, you will often see them digging in bunkers.

Pile of sand created by burrowing cicada killers

Cicada Killer Mounds on 7 fairway