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Killer bees

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With World Bee Day coming up, let’s take a closer look at one of the most fascinating bee species on the planet: The killer bee.

Origins of Africanized honey bees

While their cousins are know to help police catch serial killers, Africanized bees prefer to do the killing themselves.

In the 1950s, Brazilian researchers attempted to breed a more productive and disease-resistant honeybee by crossing a European honeybee with a subspecies of African honeybee. This resulted in the creation of Africanized honeybees, also known as “killer bees,” a hybrid species of honeybee. The goal was to create a bee that would be better suited to the subtropical climate of South America. However, some of the experimental bees escaped from the research facility and began to mate with the local honeybees.

Global spread and distribution of killer bees

The Africanized honeybees quickly spread throughout South America and eventually made their way to Central America, Mexico, and the southern United States. They are now found in many parts of the world, including parts of Africa, Asia, and Europe. They are known for their aggressive behavior, which has earned them the nickname “killer bees.” Africanized honeybees are more likely to swarm and attack in defense of their colony than European honeybees, and their venom is no more potent than that of European honeybees.

Reputation as ‘’killer bees’’

One of the key characteristics of Africanized honeybees is their extreme aggression, which earned them their nickname “killer bees.” They will aggressively defend their colonies and will attack in greater numbers and with more ferocity than European honeybees. This aggression can be dangerous for people and animals that come into contact with the bees, and they have been known to cause deaths in some cases.

Agressiveness of killer bees

Scientists believe that the aggressive behavior of Africanized honeybees is caused by a combination of traits from European and African honeybees in their genetic makeup. Researchers in the 1950s bred African honeybees known for their defensive behavior with European honeybees, leading to the creation of hybrid bees that inherited the African bees’ aggressive behavior.
Their ability to thrive in tropical climates also contributes to their success in colonizing new areas. They are now found in a wide range of locations, from the northern part of Argentina to the southern United States.
It is also believed that Africanized honeybees are more aggressive because of their increased mobility. They are able to fly faster and further than European honeybees, which allows them to more easily establish new colonies in new areas. This increased mobility also makes it harder to control their spread and manage their populations.

Ecological impact of killer bees

One major effect is on the population dynamics of other bee species. Africanized honeybees are highly competitive and will often outcompete native bee populations for resources such as nectar and nesting sites. This can lead to a decline in the overall bee population and a disruption in the pollination of plants.
Additionally, Africanized honeybees can also impact the behavior and population of other animals that rely on bees for food, such as birds and mammals. Their aggressive behavior can make it more difficult for these animals to forage for bees, potentially leading to a decline in their populations as well.
Furthermore, their spread to new areas can also lead to changes in the composition of plant communities. Africanized honeybees are more adapted to tropical climates, and their presence in these regions can lead to an increase in the abundance of tropical plant species at the expense of native plant species.


In conclusion, Africanized honeybees, also known as “killer bees,” are a hybrid species of honeybee created through the interbreeding of European honeybees and the African honeybee. Their aggressive behavior and increased mobility have led to their spread throughout many parts of the world, from South America to the southern United States. While they are known for their aggressive behavior, which can be dangerous for people and animals that come into contact with them, they also have a significant impact on local ecological systems. Their competitive nature can lead to a decline in native bee populations and changes in plant communities. Further research is needed to fully understand the ecological effects of Africanized honeybees and to develop effective management strategies to mitigate their impact on local ecosystems.


When dealing with Africanized honeybees, it is important to take precautions to protect yourself and others from their aggressive behavior. Here are a few steps to take when encountering Africanized honeybees:

  1. Remain calm: Africanized honeybees are more likely to attack when they feel threatened, so it is important to remain calm and avoid sudden movements.
  2. Get away from the bees: If you come into contact with Africanized honeybees, try to quickly and calmly move away from the area. Avoid running, as this will trigger their aggressive response.
  3. Wear protective clothing: When working around Africanized honeybees, it is important to wear protective clothing such as a beekeeping suit or veil, gloves, and boots.
  4. Use bee repellents: Some bee repellents, such as citronella, can be used to keep Africanized honeybees away from an area.
  5. Call for professional help: If you have a large swarm of Africanized honeybees on your property, it is best to call a professional beekeeper or pest control company to safely remove them.
  6. Be aware of the environment: Be aware of the environment when going out and take note of bee activity. If you notice a lot of bees flying around, it may be best to avoid that area.

It’s important to note that even though Africanized honeybees are more aggressive, they are not more venomous than European honeybees. The venom of both types of bees is the same. The danger comes from the number of stings that can happen in an attack. If you’re stung multiple times, you could have a severe allergic reaction, so it’s important to take precautions to avoid being stung.

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