Killer Bees The Africanized Honey Bee is actually a variety of honeybee derived by hybridization from African honeybees naturalized in the western hemisphere. Because they are highly defensive and will attack perceived intruders more readily than the common European honeybee, they are also known by the popular name of “killer bees.” Brazilian scientists imported African honeybee queens in the 1950’s in order to breed a honeybee for use in tropical climates. Some swarms escaped into the wild. Because they were highly adapted for tropical survival and had no natural competitors, they thrived and spread rapidly through South America, extending their range by as much as 500 km (300 mi) per