Africanized bees, focusing on increasing their numbers, will build nests in the hollows of trees, inside walls, on porches, in sheds, in attics, and in unlikely places such as trash receptacles and abandoned vehicles. Because they build nests and move more readily and more rapidly than other honey bees, homeowners may not be aware of Africanized bees until they unwittingly encounter these aggressive species.
When Southwestern ranch owners and farmers that have peacefully co-existed with wild honey bees for years are reporting that the bees are starting to sting humans and animals, apiculturalists and entomologists agree that most of the wild bee populations in the Southwestern US are Africanized. This has been the case since the end of 1990s.
While bees of any species aren’t known to attack without provocation, Africanized bees, much more sensitive than other species, react even to noises and vibrations near their nests and attack in greater numbers, for a longer period of time than common honey bees. Africanized bee populations pose threats to humans and animals in urban areas, as well.