Drone drifting differs between drones from gentle colonies and drones from
highly defensive colonies. Drones from highly defensive colonies (in an
experiment done at Cardiff, U.K., Echazarreta, Paxton, Kolmes, and Fergusson-
Kolmes, Actes coll. Insectes Sociaux 5:153-159, 1989) drifted earlier, whether
they entered a specific second colony or not was related to its defensive
behavior. Both drones from highly defensive colonies and drones from gentle
colonies preferentially drifted into gentle colonies.