24. Africanized Honey Bee
Africanized bee on top | bbc.com
In the 1950s, scientists tried to make a bee with better honey production. The bee turned out pretty aggressive, which was no problem in the lab, but then 26 swarms escaped. By the mid-80s, Africanized bees made it to North America. The more common name for these beauties is the “killer bee,” but that name is a matter of lore and inaccurate. There is no greater potency in the sting of an Africanized bee than their European counterparts, but swarms will pursue longer and more aggressively. Swarms of any bee can kill humans.