Highly eusocial bees, such as honey bees, stingless bees, and bumble bees, exhibit complex social structures that enable remarkable ecological success across diverse environments. This study explores the thermal and desiccation tolerance of these groups. We measured thermal limits and water balance traits, including water loss rate and critical water content. We observed wide variation among species in these traits, highlighting complex, trait-mediated differences and offering insights into how eusociality shapes physiological responses at both individual and colony levels.