Saw what appeared to be robbing going on at the entrance to one of my hives I placed a virgin queen in four days ago, so I reached down to close the little rotating excluder screen and reduce the entrance size. As I did this, I noticed a much larger, darker bee buzzing around the entrance. Definitely not a worker or a drone. Then it landed And I noticed the longer abdomen of a queen. She even had a few bees following her. Just a wild guess this was probably my virgin queen on an orientation flight. I lifted the lid slightly and let her crawl back in with her little trail of followers.
After about 15 minutes, the robbing frenzy at the entrance hole stopped and I opened it back up.
A somewhat rare occurrence, thought I might share it.