Glossary
A hybrid honey bee resulting from the crossbreeding of African honey bees (Apis mellifera scutellata) with various European subspecies. Often called 'killer bees' in media, Africanized bees are more defensive, swarm more frequently, and respond to disturbances in greater numbers than European stocks.
In 1956, Brazilian geneticist Warwick Kerr imported African honey bees (Apis mellifera scutellata) to Brazil, intending to crossbreed them with local European stocks to develop a bee better adapted to tropical conditions. Twenty-six African queen colonies escaped quarantine in 1957 and began interbreeding with feral European populations. The resulting hybrids, combining African defensiveness with European fecundity, spread northward through Central America and into the United States, reaching Texas in 1990 and Florida shortly after.
Africanized bees are genetically very similar to European honey bees and produce the same quality honey, wax, and propolis. The differences are behavioral rather than physical. Africanized colonies defend their hive with greater intensity: they deploy more guard bees, respond to disturbances faster, pursue perceived threats over longer distances (sometimes 500+ yards versus 50-100 for Europeans), and take longer to calm down after being disturbed. They also swarm and abscond more frequently.
The "killer bee" moniker, while sensational, refers to the fact that their aggressive defensive response can result in victims receiving hundreds or thousands of stings during an attack on a perceived threat. Individual stings are identical to European bee stings; the danger lies in the volume of the response.
In Florida, Africanized genetics are present in the feral bee population. Managed colonies can acquire Africanized traits when a virgin queen mates with Africanized drones at a drone congregation area. Beekeepers combat this by regularly requeening colonies with gentle, commercially raised queens of known European stock. If a colony becomes unusually defensive, requeening typically resolves the behavior within one brood cycle (about 6 weeks) as the old workers die off and new workers from the European queen's eggs take their place.
Yes. Africanized bee genetics are present in Florida's feral bee population. Managed colonies can acquire these genetics through natural mating. Florida beekeepers manage this by requeening colonies with gentle European queens whenever defensive behavior increases.
Not by looking at them. Africanized bees are virtually identical in appearance to European honey bees. The only reliable identification methods are morphometric analysis (measuring wing venation under magnification) or DNA testing. Behavioral observation (increased defensiveness) is the practical field indicator.
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