You’ve managed your honey bee colonies all spring and summer with no problem. Now and then an aggressive guard warned you off, but in general, the bees were docile.
All of a sudden, however, the bees are angry. They fly at you. They form a dark cloud above their hive. And they might bury themselves in your pet’s fur. What gives?
Many aspects of a honey bee colony are cyclic in nature, and aggression is no exception. Honey bees may become belligerent at any time, but certain things set them off. In the late summer and early fall, more of these conditions exist.
What causes feisty bees?
Here are some of the factors that may make your honey bees more contentious:
- Queenlessness is frequently a cause of hostile bees. The bad behavior usually stops as soon as the colony or the beekeeper replaces the queen.
- A shortage of nectar-producing flowers is called a nectar dearth. The bees can’t find nectar so they often try to steal it from other colonies. This begins an assertive behavior known as robbing.
- Not only are robbing honey bees threatening, but the bees being robbed become combative defenders of their stores. This often results in a cloud of bees around a hive, especially in the fall.
- Look carefully. If robbing is going on, you will see bees fighting with each other at the hive entrance. Dead honey bees may litter the ground in front of the hive.
- The fighting bees release an alarm pheromone—an odor that warns other bees of the danger. The alarm pheromone makes other honey bees combative, and more fighting means more pheromone is released which means more bees join the fray. The situation can escalate quickly.
- Once the alarm pheromone has aroused the bees, you and your pets and your neighbors are fair game as well.
- After robbing, other predators may flock to the odor of dead bees and the scent of open honey. Before long, wasps and yellowjackets arrive on the scene to collect both meat and sweets. This means more fighting and more alarm pheromone. What a mess.
- Honey bees and wasps are not the only creatures preparing for winter. Raccoons, opossums, or skunks may attack colonies, especially as the days become cooler. Regular visits by any creature—including a beekeeper—may make honey bees more antagonistic.
- Rainy weather, especially when it comes with heat and high humidity, makes bees cranky as well. During the “dog days of summer,” no amount of fanning helps evaporate the nectar or cool the hive.
Of course, other factors can produce an aggressive colony. If the queen was superseded by a queen with more aggressive or Africanized genes, that could be the source of the problem. This is unlikely, however. More often than not bad behavior is merely a part of the cyclic nature of honey bee colonies.
Honey Bee Suite