For centuries, beekeepers and naturalists have described a honeybee swarm as a new colony setting out to found a fresh home, leaving the old nest behind. A new review paper by Dr. Hannes Bonhoff of Lund University and Dr. Heikki Helanterä of the University of Oulu argues that this interpretation has it backwards. According to the authors, the departing swarm is actually the parent colony leaving with its queen, while the afterswarms that follow may allow the original colony to produce multiple offspring.
The distinction is not merely semantic. In the conventional account, the swarm is a daughter colony, and the bees remaining in the original nest represent the parent lineage. Under the reinterpretation proposed by Bonhoff and Helanterä, the roles are reversed: the swarm carries the established colony and its reigning queen to a new site, while the old nest becomes a kind of offshoot. This reframing could reshape how researchers and beekeepers understand colony reproduction, dispersal, and the evolutionary logic of swarming.
The review draws on existing literature to challenge a narrative that has persisted for centuries. Beekeeping texts have long treated swarming as a form of colony multiplication in which a new queen and a portion of the workers depart to establish an independent nest. The authors suggest that this framing has obscured the possibility that afterswarms — secondary swarms that leave after the primary swarm — serve a different function: enabling the parent colony to produce more than one offspring.
If the authors are correct, the implications extend beyond terminology. Colony reproduction is a central question in social insect biology, and how researchers model the costs and benefits of swarming depends on which bees are considered the parent colony and which are considered the offspring. A reversal of that relationship could affect studies of honeybee ecology, the spread of colonies into new habitats, and the management practices beekeepers use when they try to control swarming.
The paper is a review, meaning it synthesizes and reinterprets previously published observations rather than presenting new field data. That makes the argument a challenge to the dominant interpretation rather than a definitive experimental result. Still, the authors contend that the evidence already available is more consistent with their reading than with the traditional one, and they call for renewed attention to how swarming behavior is described and studied.
Honeybees are among the most intensively managed and observed insects on Earth, which makes the persistence of a possible misreading notable. Swarming is a familiar event to beekeepers, yet the review suggests that familiarity has not guaranteed accurate interpretation. The authors argue that centuries of beekeeping tradition have embedded assumptions that later researchers have tended to accept rather than test.
The review appears amid continued scientific interest in honeybee behavior, colony health, and the environmental pressures facing pollinators. While the paper focuses on the conceptual framing of swarming, its argument touches on broader questions about how colonies reproduce and disperse — processes that matter for both wild and managed populations.
Bonhoff and Helanterä conclude that the departing swarm should be understood as the parent colony leaving with its queen, and that afterswarms may allow that colony to produce multiple offspring. Whether the wider research community adopts this reinterpretation will depend on further studies that test the predictions it makes against observations of swarming colonies in the field.