Around here the yellow jackets/hornets/wasps and humming birds do not mix well. The stinging creatures must get something from the feeder. Maybe on a really hot afternoon the sugar solution will rise up so they can feed from the fake flowers around the feeder.
If the hummers are really hungry they will drive off the stinging creatures - but it's always a running engagement.
That is an amazing picture. Something I would never see around here.