Unaffected by the African-queen-bee's scent, which normally maintains her majesty's monopoly on reproduction, the interloper activated her ovaries.

ECONOMIST: African honeybees

This original Cape bee then wandered into an African-honeybee hive and began working there.

ECONOMIST: African honeybees

The second oddity is that in 1990, or thereabouts, a single Cape bee hatched with a handful of mutations that made her eggs smell like those of African-honeybee queens.

ECONOMIST: African honeybees