> The last feral North American honey bees were wiped out in the 1980s, by the Varroa mite.

This is likely overstated a bit, though I can't find any recent definitive surveys of persistent feral honeybee hives. The best I can do is this:

http://journals.plos.org/plosone/article?id=10.1371/journal....

but they don't actually test any feral hives, just attempt to determine factors that could lead to survival with varroa infestation. Anecdotally I know of a few feral hives that have survived multiple years in trees and barns, but I can't rule out the possibility that they're "seeded" by swarms from managed hives every spring (they're too far away for me to inspect regularly). Also, Youtube has a few folks doing cutouts of wild hives that have taken up residence in houses and sheds, and there's clear evidence of multiple years of work in some of these hives.

A bit of a nitpick, I admit, but I'd go with "mostly wiped out" personally.