Oh, no...I'm well aware of the difference.
You haven't really had the genuine Florida experience until you have one of these land on the back of your neck and run down the inside of your shirt.
I'll go ya one better: all of the urinals needed to be removed from one of the AMU bathrooms. First, one comes up...no problem, as do the second and third ones. When the fourth and final one was lifted, out pours thousands of Palmetto bugs, We're talking an eruption that covered the floor and kept on coming.
A friend of mine had a pet one in his Camaro. We'd be driving down the road and he'd say "There he is." It'd sit on top of his tape deck and you could see it's antennae in the green glow.
The main thing that makes me believe what you saw flying in the light were Palmetto Bugs is... water bugs can't fly. In fact, they can't even ambulate well on land. In the water though, they're hell on wheels -- on you biting away faster than a horsefly.