In the intricate world of tropical social wasps, the upheaval following the loss of a queen does not spell disaster for the colony, thanks to a fascinating behavioral adaptation recently unveiled by researchers at University College London (UCL). A new study published in the prestigious journal Animal Behaviour sheds light on how colonies of Polistes canadensis, a species of paper wasp native to the Caribbean, navigate the chaos of leadership succession marked by intense aggression and social turmoil. Contrary to previously held assumptions that such violent power struggles would destabilize societies, these wasp colonies demonstrate a remarkable resilience facilitated by a subset of individuals who compensate by intensifying their labor, thus maintaining essential colony functions.
At the heart of this discovery lies the complex social structure of Polistes canadensis colonies, where reproductive dominance is typically monopolized by a single queen. However, unlike many eusocial insect systems where workers are sterile, subordinate females retain reproductive potential and vie for dominance should the queen perish or disappear. The ensuing power vacuum triggers aggressive contests, with many individuals engaging in fierce interactions as they compete to ascend the reproductive hierarchy. This volatile period of succession, formerly perceived as a threat to colony stability, unfolds with apparent anarchy, as traditional social networks fragment under the pressure of competition.
To probe the dynamics of this succession phase, the UCL team conducted controlled queen removals in established Polistes canadensis colonies, simulating natural scenarios such as queen mortality or displacement. The results were immediate and dramatic: aggressive behaviors surged, social bonds unraveled, and the colony’s usual mechanisms for order and cooperation dissolved into disarray. Observing this breakdown offered unprecedented insight into the costs of dominance contests in systems lacking orderly transfer protocols. Yet, intriguingly, despite this social convulsion, the colonies did not succumb to collapse or dysfunction.
The key to social perseverance during these fractious intervals is the emergence of what the researchers term “compensators.” These individuals—distinct not by genetic or morphological traits but by their behavioral strategies—withdraw from aggression and instead ramp up their efforts in vital colony tasks, including foraging and brood care. By prioritizing essential maintenance activities over participation in the violent scramble for power, compensators ensure sustained resource flow to developing larvae and uphold the colony’s basic functional integrity amidst leadership chaos. This redistribution of labor highlights a sophisticated form of social flexibility previously underappreciated in tropical wasp societies.
Strikingly, the compensators appear to inhabit a strategic niche rather than a fixed caste, suggesting the behavioral variability is adaptive rather than innate. This plasticity enables individuals to tailor their responses based on the social environment and reproductive prospects. Some wasps pursue dominance, driven by the prospect of direct reproductive benefits, while others invest in the survival of the communal brood—genetically composed of their siblings—thereby securing indirect fitness gains. This dual pathway to evolutionary success underscores the complex negotiation between competition and cooperation that characterizes eusocial insects.
Lead author Dr. Owen Corbett of the UCL Centre for Biodiversity & Environment Research emphasized the duality of the colony’s response: “While a subset of individuals engage intensively in conflict to claim reproductive rights, others choose to remain above the fray, opting to sustain the colony’s everyday operations. Cooperation did not vanish amid the turmoil; rather, it was strategically realigned to prioritize group survival.” This nuanced interpretation challenges the simplistic view of succession as a zero-sum contest between winners and losers.
This research delivers a rare glimpse into aggressive succession in tropical cooperative species, an area long overshadowed by studies on temperate social insects characterized by orderly hierarchies and predictable inheritance rules. The chaos observed in Polistes canadensis reveals an alternative evolutionary trajectory where societies endure and stabilize despite—and indeed because of—the coexistence of conflict and compensatory cooperation. Such complexity expands understanding of social evolution and illuminates mechanisms by which animal groups mitigate the costs of intraspecific conflict.
Underlying these findings is the reanalysis of comprehensive behavioral data gathered during fieldwork in Panama in the early 2000s, underscoring the enduring value of longitudinal and detailed observational studies in deciphering animal social behavior. The contemporary vantage point allows interpretation through fresh theoretical frameworks, linking ecological variables, social network theory, and evolutionary biology to behavioral outcomes in wild populations.
Furthermore, this investigation disputes the prevailing notion that peaceful, rule-based succession is the only viable strategy for maintaining eusocial societies. Aggression-driven contests, previously dismissed as prohibitively costly, are shown to be sustainable when counterbalanced by compensator individuals who uphold critical colony functions. This balancing act between conflict and cooperation could be a widespread evolutionary strategy, potentially observable across diverse taxa exhibiting hierarchical competition.
Senior author Professor Seirian Sumner, also of UCL, draws a broader parallel between wasp societies and human social systems: “In tumultuous times, survival depends on those who persist in essential duties behind the scenes, away from the spotlight of power struggles. This study reminds us that cooperation takes many forms, and often those who sustain society are not front and center but quietly maintaining the foundation that others build upon.” Her reflections resonate beyond entomology, suggesting universal principles in the maintenance of complex societies.
The implications of this study extend into fields such as evolutionary biology, behavioral ecology, and sociobiology, presenting Polistes canadensis as a compelling model for examining the interplay between individual interests and collective stability. By illuminating the roles of non-competitive individuals in offsetting the costs of aggression, the research invites reconsideration of how cooperation and conflict coevolve in social organisms, providing novel insights into resilience mechanisms under social stress.
Funded by the Natural Environment Research Council (NERC) and the Smithsonian Institution, this research not only advances fundamental scientific knowledge but also enriches understanding of the biodiversity and social complexity of tropical ecosystems. The ongoing exploration of these wasp societies continues to challenge assumptions, revealing the dynamic, multi-layered strategies employed by animals to preserve their communities in the face of internal upheaval.
Subject of Research: Animals
Article Title: Compensation of labour by non-competitive individuals mitigates costs of aggressive succession contest in a tropical social wasp
News Publication Date: 25-May-2026
Web References: http://dx.doi.org/10.1016/j.anbehav.2026.123581
References: Corbett, O. R., Dreier, S., Lengronne, T., Patalano, S., Reuter, M., & Sumner, S. (2026). Compensation of labour by non-competitive individuals mitigates costs of aggressive succession contest in a tropical social wasp. Animal Behaviour. https://doi.org/10.1016/j.anbehav.2026.123581
Image Credits: UCL
Keywords: Polistes canadensis, social wasps, eusocial insects, cooperative societies, aggressive succession, compensator behavior, foraging, brood care, reproductive dominance, tropical wasps, social stability, animal behavior
