Africanized honey bee

Definition

A highly defensive, tropical-adapted hybrid population of the western honey bee (Apis mellifera) produced by crosses between African subspecies (primarily A. m. scutellata) and various European subspecies. Descendants of experimental stock released in Brazil in 1957, Africanized honey bees spread throughout the Americas, displacing or hybridizing with resident European honey bee populations. They are characterized by rapid colony growth, frequent swarming, and markedly aggressive colony defense—traits that increase stinging incidents but also confer enhanced mite resistance and foraging efficiency in tropical climates. The term refers to a population or strain, not a formal subspecies; genetic composition varies across their range due to ongoing hybridization.

Etymology

From African (referring to African subspecies ancestry) + -ized (made into, rendered in the manner of) + honey bee; coined in the 1960s–1970s as these hybrids spread through the Americas.

Example

Beekeepers in the southern United States often requeen colonies with European stock to reduce defensive behavior, yet feral populations remain predominantly Africanized honey bee hybrids that retain tropical adaptations unsuited to temperate winters.

Synonyms

• Africanized bee
• AHB
• killer bee (colloquial)

Related Terms

• Apis mellifera
• Honey bee
• Subspecies
• hybridization
• swarming
• colony defense
• scutellata

Usage Notes

Specialists avoid the sensationalist 'killer bee' in formal contexts. 'Africanized' describes hybrid ancestry, not pure African stock; bees in different regions show varying European admixture. The term is sometimes misapplied to any defensive honey bee. Contrast with: European honey bee (general term for non-Africanized stocks), African honey bee (pure African subspecies, primarily A. m. scutellata). Not a formal taxonomic rank—population or strain is preferred.