We had a thunderstorm today and then the sun came out. An hour later I went out to watch the bees and I found a bee laying on her back wiggling - chopped in half! I immediately suspected a hornet. Not knowing what to do, I put the entrance reducer in and headed for the computer!
The reducer is at the 4" opening setting. If this even IS the correct thing to do, should I have taken it to the smallest setting (about 3/4" ?)