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Research demonstrates that tongue microstructure affects foraging efficiency in bumblebees, indicating physiological roles in behavioral shifts between castes.
Bumblebee ( Bombus terrestris ) is a primitively eusocial species that sustains its colonies by dividing foraging duties between queens and workers. Previous research emphasizes hormonal, metabolic, and behavioral contrasts between the castes but seldom considers why queens relinquish foraging once workers emerge. Here, we link foraging efficiency to tongue microstructure, providing physical evidence for the shift in bumblebee foraging behavior.
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Huang et al. (2026) studied this question.
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