Below is a picture of the wasp nest that I found earlier this evening while I was out mowing the lawn.  Soon afer this picture was taken, I sprayed the area thoroughly with poison, thereby killing all of these flying, stinging menaces.

It's not the biggest nest I've ever seen, but it's always a bit unnerving to come face to face with one of these, particularly when it's teeming with wasps and it's at eye level.