in 1957 a beekeeper in brazil was trying to breed stronger bees he wanted bees that would produce more honey he mated two species of bees one of the bee types was the tanzanian african bee this was a mistake when the two bee species mated they created a third very aggressive bee species regrettably 26 of these new aggressive african queen bees escaped from their bee hives they have since interbred with more common and non-aggressive european bees all around the world