Wild bees require suitable nesting sites as well as flowers for foraging, and providing diverse nesting habitats in gardens and green spaces is an evidence-based welfare and conservation intervention.
Wild bee populations are declining across Europe and North America, with loss of suitable nesting habitat alongside floral resource reduction as the primary causes. Providing nesting habitat supports not only bee population recovery but the immediate welfare of individual bees seeking to breed. Bees unable to find suitable nest sites cannot reproduce, and the foraging energy they invest in searching for sites is wasted. Well-designed nesting habitat that meets the actual requirements of native bee species, rather than the generic bee hotels with inappropriate hole diameters that dominate the market, provides genuine welfare and conservation benefits. A patch of bare earth in a sunny corner of a garden can support dozens of ground-nesting bee colonies.