Killer bees, or Africanized honey bees, are hybrid mistakes. They first came to being in 1957, when a replacement bee keeper accidentally released 26 Tanzanian queen bees in between the rest of the bee hives, on a farm in South Eastern Brazil. The hives had belonged to biologist, Warwick E. Kerr, who had intended to interbreed European bees with Southern African bees, to create a strain of bees that would produce more honey and that would adapt better in tropical conditions than European bees. Since their release, the killer bees have multiplied and migrated. They can be found throughout South America and through most of North America, now. Africanized honey bees are highly aggressive, hence the name “killer bee”, and are known to move huge distances in massive swarms. When they are threatened in any way, they will attack, and their attacks came in large numbers. They will ruthlessly sting any threat to death, as happens to about two people a year in the US.