Yes, Berry, I discovered years ago when I inadvertently squished a bee, the bees have memory and some sort of feelings for lack of better wording.
I squished a bee on an adjacent hive lid. I watched a calm guard bee gently walk up to check out the squished bee. One sniff of he dead bee and instantly, to my surprise the guard bee quickly determined, correctly I might add, that I was cause of squished bee and the guard bee made a bee line for my protected face. That single guard bee made that high pitched buzz rite in my veil, which alerted the other bees that I was a danger, I killed a sister bee.
As you probably already figured I soon had a face veil full of angry bees. I had to quit my inspection and move on to another hive. However, I was followed by an angry guard bee which also alerted the second hive with that high pitched buzz. Upon removing the lid, the second hive was on alert and proceeded to let me know I was not welcome and I would be stung if I continued with the second inspection.
So I replace the lid on the second hive and walked away for half hour. Upon returning to the hives 30 minutes later, all was normal and inspections proceeded without further complications. The above ordeal all started with a single accidental squished bee and a single guard bee with that unmistakable high pitched angry buzz which I have long since recognize. A very high pitch, constant tone that does not fluctuate in pitch or audio, a constant tone, alarm it is and serves as a call to other bees to defend, be on alert, danger. If you listen to your bees, they talk.
As I walked into my apiary this afternoon, 53F, calm and sunny, several bees approached me to ask if I had any food for them. No less than 8 bees politely asking. Desiring some sugar syrup I imagine but still to cold to feed syrup at the present weather conditions.
Blessings