Remember when I had all that gopher activity? Well, no gophers this year, but a group of bees have invaded. Ground bees. I think they are squatting in an old gopher tunnel. I looked at them through my binoculars - they appear to be yellow jackets. If they were honey bees, I'd leave them alone.
I planted a yellow jacket trap nearby. It's definitely in use, now.
I tried watering the hole for 20 minutes last night, and again this morning before it was light. Didn't do a thing to deter them.
Tonight I am getting out the poinsonous spray.