Wild Bee Health and Pesticide Welfare

Wild bee populations are declining globally — pesticide exposure, habitat loss, and disease are causing population collapses that harm billions of individual bees and the ecosystems they support.

Key Facts

There are over 20,000 species of bees worldwide — only approximately 500 are managed honey bees; the rest are wild solitary or colonial species
Approximately 35% of wild bee species are declining globally according to IUCN assessments
Neonicotinoid pesticides — systemic insecticides used in agriculture — impair bee navigation, learning, and reproduction at sub-lethal doses
The EU banned outdoor uses of clothianidin, imidacloprid, and thiamethoxam in 2018 following evidence of harm to wild bees
Wild bees are responsible for pollinating 80% of wild flowering plants and approximately 75% of global food crops — their decline has direct consequences for food security
Varroa mite, which parasitises honey bees and indirectly affects wild bee health through viral pathogen transmission, has spread globally since the 1980s
Habitat loss — removal of wildflower meadows, hedgerows, and rough grassland — reduces the foraging and nesting resources wild bees depend on

Welfare Considerations

Wild bees experience suffering from pesticide exposure — sub-lethal neonicotinoid doses impair the mushroom bodies involved in learning and memory, preventing bees from navigating back to their nests. Disoriented bees that cannot return to colonies may experience a prolonged and disorientating death in the field. At population level, the collapse of wild bee communities reduces the density of pollination services, affecting plant communities and the food chains they support — cascading welfare effects across species. The precautionary principle supports strong pesticide regulation even under uncertainty, because the ecological and individual welfare costs of inaction are severe.

What You Can Do

Plant a diversity of native flowering plants in your garden — this is the single highest-impact individual action for wild bees
Avoid pesticide use in gardens, particularly systemic neonicotinoids — check product labels before purchasing
Support the EU neonicotinoid ban and advocate for equivalent restrictions in countries where they are still in use
Leave areas of rough grass, bare soil, and old wood in your garden — these provide nesting habitat for solitary bees
Support the Bumblebee Conservation Trust, Buglife, and Xerces Society in their wild bee conservation work
Choose food produced under farming systems certified to reduce pesticide use (organic, integrated pest management)
Participate in citizen science bee surveys such as BeeWalk, the Great British Bee Count, and Bumble Bee Watch