Wild Bee Nesting Habitat: Supporting Ground and Cavity Nesters
Over 70% of wild bee species nest in the ground, and many others require hollow stems, dead wood, or rock crevices. Habitat loss and tidiness culture have removed most nesting sites, contributing to bee population declines across Europe and North America.
Key Facts
Over 70% of wild bee species are ground-nesters requiring bare or sparsely vegetated soil
Many solitary bees nest in hollow plant stems, beetle borings, or snail shells
Female solitary bees construct and provision nests entirely alone, without a colony
A single ground-nesting bee may travel up to 500 metres to provision her nest
Excessive garden tidiness — removing dead wood and stems — eliminates nesting habitat
Pesticide-free bare soil patches are among the most valuable garden additions for bees
Commercial bee hotels often have holes too large or too shallow to be effective
Mining bees and bumblebees require undisturbed soil that remains stable for weeks to months
Welfare Considerations
Wild bees provide irreplaceable pollination services but also have welfare interests of their own as sentient invertebrates. Ground-nesting species invest enormous effort constructing and provisioning nests, and disruption of active nests causes direct harm to females and kills developing larvae. The near-total removal of nesting habitat from urban and agricultural landscapes has forced wild bees into marginal sites with poor success rates. Restoring diverse nesting habitat has direct welfare benefits for individual bees as well as population-level conservation benefits.
What You Can Do
Leave a bare or sparsely vegetated south-facing patch in your garden for ground-nesting bees
Avoid rotavating or disturbing soil patches between March and August during nesting season
Leave bundles of hollow plant stems and bamboo canes cut to 15-20 cm for cavity nesters
Retain dead wood and standing deadwood for wood-boring bee species
Make bee hotels with appropriate hole diameters (4-10 mm) and depths (15+ cm)
Avoid pesticides in and around garden areas used by bees
Reduce lawn mowing frequency to allow ground-level nesting undisturbed
Report bee nest sightings to citizen science databases to map population distributions