In an effort to create a species of docile bees, the African honey bee was cross-bred with various European honey bees, like the Italian bee and the Iberian bee.
The result was the total opposite of expectations. The new subspecies tends to swarm more frequently and travel further than other honey bees. They exhibit more defensive behavior when threatened. They pursue predators more aggressively and for a greater distance from the hive than other honey bees. They have a higher number of “guards” for their hives.
In other words, the experiment goofed. Big time.