Social Insect Behavior and Ecology

Social insects, including ants, bees and wasps, epitomise advanced collective organisation, characterised by overlapping generations, cooperative brood care and a reproductive division of labour. Central to their success are finely tuned communication systems—chemical, tactile or acoustic—that regulate foraging, defence and nest construction. Division of labour emerges through interactions between genetic predisposition, individual age and environmental cues, yielding specialised castes such as foragers, nurses and guards. Colonies exploit diverse foraging strategies, from solitary exploration to mass recruitment, optimising resource acquisition under varying ecological conditions. Defensive behaviours span passive strategies like chemical deterrents to active soldier castes and self‐sacrificial attacks, reflecting trade-offs between individual survival and colony fitness. Ecological studies reveal that biodiversity underpins social-insect resilience: florally rich habitats sustain continuous resource flow, boost colony growth and mitigate population declines. Conversely, habitat fragmentation and monocultures disrupt communication networks, impair division of labour and compromise colony health. Across taxa, social insects serve as bioindicators of ecosystem integrity and model systems for collective cognition, with implications for pollination services, biological control and understanding of social evolution.

Research from Nature Portfolio

Recent studies have shown that the repeated evolution of distinct soldier sub-castes in stingless bees coincides with pressures from parasitic robber species. Colonies facing parasitism evolved morphologically specialised defenders multiple times over millions of years, enhancing nest protection. Another seminal work has demonstrated that floral diversity directly drives colony fitness: social bee populations in biodiverse environments exhibit higher resource intake, larger food stores and accelerated reproductive output. These findings underscore the pivotal role of ecological complexity in shaping both social organisation and population dynamics.

Social Insect Behavior and Ecology publication trend

The graph below shows the total number of articles in social insect behavior and ecology across all publications each year (not limited to Nature Index journals).

Technical terms

Eusociality: The highest level of social organisation featuring cooperative brood care, overlapping generations and a reproductive division of labour.

Division of labour: The allocation of different tasks (e.g. foraging, defence) to distinct individuals or castes within a colony based on age, morphology or environment.

Caste differentiation: The developmental process by which genetically similar individuals adopt specialised morphological or behavioural roles.

Recruitment communication: The transmission of information to nest-mates about resource location or quality through signals such as pheromone trails or vibrational cues.

Inclusive fitness: An individual’s genetic success arising from its own reproduction and the support it provides to kin.

References

1. Repeated evolution of soldier sub-castes suggests parasitism drives social complexity in stingless bees. Nature Communications (2017).
2. Social bees are fitter in more biodiverse environments. Scientific Reports (2018).
3. Mechanisms and adaptations that shape division of labour in stingless bees. Current Opinion in Insect Science (2023).
4. Appetite for self-destruction: suicidal biting as a nest defense strategy in Trigona stingless bees. Behavioral Ecology and Sociobiology (2014).
5. An exploration of the relationship between recruitment communication and foraging in stingless bees. Current Zoology (2021).