Tongue microstructure physically constrains division of labor in bumblebee foraging.

Huang, Zexiang; Wu, Shumeng; Wu, Qinglin; Mai, Tianyu; Zhao, Jieliang; Wang, Bo; Wu, Jianing · Proc Natl Acad Sci U S A · 2026

basic_science · Level V

Where this comes from

Abstract

Bumblebee (<i>Bombus terrestris</i>) 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.

Medical subject headings