When I was a boy my uncle ran across some black honey bees. We did not have a clue as to their pedigree. He found them in a duck box in a (very remote) while deer hunting.
Those bees were 'VERY MEAN' to say the least! It was cold weather so we duck taped the entrance hole and stapled this in place, then took the box home. We removed the tape when we got home.When the weather was warm enough one fine sunny warm day, He/we (I was not much help lol) began removing the bees. They stung dogs! Neighbors! Tried to get into his house, etc. He had never seen anything like these bees! He really thought they may the killer bees that had been talked about so much around that time period. Yet africanized bees had not reached anywhere close to our State at that time, or any neighboring State either.
My Uncle was so concerned that he Visited Tim Durham, "The Walls Bee Man", which does not live very far from us. He and Tim talked about this. I was there as a tag along. Best as I can remember Mr Durham assured him those bees were not the killer bees but probably, and most likely decedents of the Black German bee which was notorious for fury. I tend to believe Mr Durham was right, especially since these black bees were found in such a remote area that had not had human population in quite some time. When re-queened they eventually gentled down like a little kitten hive lol...
Phillip