Salty, what a beautiful thought, I should learn from you.
HP, yesterday, 10/6/19 I watched a bumble bee try to enter a bee hive. The bumblebee was wrestled off the entrance and took off.
As you are aware, Hornets, yellow jackets, the carnivores type bees/wasp are killed if they mess with my hives. However, to my knowledge bumblebees are nectar gathering and not a threat such as the carnivores but there was no time wasted by my honeybees attacking the sole bumblebee.
About one week ago, I did notice a small, I mean tiny, shiny green bee on a frame in my hive. Not a mason bee, I am looking at a bee 1/4 the size of the worker honey bee and a very slim bee for it body length. There is a possibility the green bee flies unnoticed on the frame I was inspecting and was not actually in the hive.
In Arkansas there must be 20 different species of bees or wasp I have noticed on my property including the dreaded European Hornet. Wait till you see one of those hornets up close and personal. Bee suit no protection from the European hornet.
Blessings
Van