A newer publication shows the genetic admixture of the Africanized honey bees in Brazil. The small number of honey bees with African ancestry that were introduced to Brazil in 1956, which dispersed and hybridized with existing managed populations of European origin and quickly spread across much of the Americas, is an example of a massive biological invasion as earlier told in this article. Here, they analysed whole‐genome sequences of 32 Africanized honey bees sampled from throughout Brazil to study the effect of this process on genome diversity. By comparison with ancestral populations from Europe and Africa, they infer that these samples had 84% African ancestry, with the remainder from western European populations. However, this proportion varied across the genome and they identified signals of positive selection in regions with high European ancestry proportions. These observations are largely driven by one large gene‐rich 1.4 Mbp segment on chromosome 11 where European haplotypes are present at a significantly elevated frequency and likely confer an adaptive advantage in the Africanized honey bee population. The chief difference between the European subspecies of honey bees kept by beekeepers and the African ones is attributable to both selective breeding and natural selection. By selecting only the most gentle, non-defensive subspecies, beekeepers have, over centuries, eliminated the more defensive ones and created a number of subspecies suitable for apiculture. The most common subspecies used in Europe and the United States today is the Italian honey bee ("Apis mellifera ligustica"), which has been used for over 1,000 years in some parts of the world and in the Americas since the arrival of the European colonists. In Central and southern Africa there was formerly no tradition of beekeeping, and the hive was destroyed in order to harvest the honey, pollen and larvae. The bees adapted to the climate of Sub-Saharan Africa, including prolonged droughts. Having to defend themselves against aggressive insects such as ants and wasps, as well as voracious animals like the honey badger, African honey bees evolved as a subspecies group of highly defensive bees unsuitable by a number of metrics for domestic use. As Africanized honey bees migrate into regions, hives with an old or absent queen can become hybridized by crossbreeding. The aggressive Africanized drones out-compete European drones for a newly developed queen of such a hive, ultimately resulting in hybridization of the existing colony. Requeening, a term for swapping out the old queen with a new, already fertilized one, can reduce hybridization in apiaries. As a prophylactic measure, the majority of beekeepers in North America tend to requeen their hives annually, maintaining strong colonies and avoiding hybridization.