Back in the 60s, Varroa mites were introduced into European honeybee populations in Europe from South East Asia. Since that time they have spread to every continent except Australia, which has managed to keep contaminated bees out so far. The mites kill a honeybee colony in less than a year and spread easily from colony to colony. They first arrived in North America in the 80s, and have spread to every state and province where bees are present. They first arrived in California, where I keep my bees, in the early 90s.
Today there are relatively few feral bees left in California, or anywhere else.
They have all died off from exposure to the mites. There are a few feral bees, but they are colonies that have swarmed out of a beekeeper's hive within a year or so. You may be thinking this is no big deal for you. Beekeepers are having a few more problems than before. Well, for starters, one third of the world food supply depends on insect pollination, directly or indirectly.