Ok, before some of these comments become "urban legend", lets consider a couple things.
Yes, the wild bees were for all practical sense, wiped out when mites came along. Was every single colony killed....no. But most if not all in some areas died. I participated in several studies looking at ferals, and when you can survey 8 miles stretches, and not have one honey bees found, in areas that once was noted in records as being great swarm tree havens, then you can assume that many colonies have died.
That was twenty years ago. Commonsense dictates that some colonies have been replaced, and continue to be replaced, by beekeepers via swarming. Just as in New York, beekeepers really don't know how many swarms are created and most are not seen. So twenty years later, and by the shear number of beekeepers out there, feral colonies can be found almost everywhere. Here in Pennsylvania, if you drew a 10 mile circle around every known apiary, and accounted for the many more not even registered, you would not have many areas not influenced by managed colonies, or repopulated by them.
I've heard for twenty years now many beekeepers finding a black bee, and then claiming they were German black bees, survivors somehow untouched by humans for decades. Yet someone tell me one breeder or beekeeper that has had his bees tested and verified as German black bees.
I've been raising and selling carni lines for years that are all black. So has many others. I should just rename them as German black bees, and charge more, since many think that is what they are. They are not.
As deknow stated, this time of the year, black bees are common at feeding stations. They are old bees, robbers many times that have nothing to lose. They lost their hair fighting at entrances and testing guard bees of other colonies. They are many times "shiny". AMM and other strains are not half black on the tip, and shiny. They are all black.