Africanized honey bees (AHB), known colloquially as "killer bees", are hybrids of the African honey bee (not A. m. adansonii; see Collet et al., 2006), with various European honey bees such as the Italian bee A. m. ligustica and A. m. iberiensis. These bees are far more aggressive than the European subspecies. Small swarms of AHBs are capable of taking over European honey beehives by invading the hive and establishing their own queen after killing the European queen.[1]