I have no answer to your question, but my bees are only 200 miles or less from Mexico. One of my hives that went through supercedure some 15 months back has some characteristics of the AHB. The bees are not overly defensive of you being close to the hive, in fact, I sometimes stand a couple of feet to the side of the hive and watch the bees come and go. When the inspection starts a little smoke and slow movements seems to keep them calm. When you remove the first frame the rev up their engines, and if the inspection continues some two or three frames down the way they come in mass. These bees will launch two or three hundred bees onto your veil and around your head. Uniquely, they start crawling on the ground and climb up your boots onto your legs. If you have an opening in your bee suit, they will find it. None of my other hives are like this. Once they attack, they will follow you a hundred yards or more from the apiary. In their favor, they are good producers and do not require any assistance. I'm going to wait until next spring and test my toughness against theirs one more time, and then make the decision to change queens or just live with this tough old bleep's progeny.