Bumblebees are social bees with complex colony dynamics and welfare needs that are threatened by pesticides, pathogens and habitat loss.
Bumblebee welfare encompasses both individual and colony-level considerations. Individual bees exposed to sublethal pesticide doses experience impaired navigation, reduced foraging efficiency and disrupted social behavior - sources of welfare harm that compound over the colony's lifetime. Commercial bumblebee colonies used in greenhouse agriculture face intensive production conditions and pathogen loads that are then released into wild bee populations. Colony welfare depends on queen health, worker density, food availability and pathogen burden. Protecting wild bumblebee welfare requires pesticide reform, habitat management providing diverse forage, and stricter regulation of commercial bumblebee colony production and movement to prevent pathogen spillover.