Bumblebees vs solitary bees
Both are wild bees and they live entirely differently. One has an annual colony with a queen and workers; the other has a female working alone with no help and no season to spare.
Which to choose
Not a choice — a garden should support both. For bumblebees: deep flowers, a long season and tussocky grass left uncut. For solitary bees: bare sunny soil, hollow stems, dead wood, fine bee hotel tubes, and the specific host plants that specialists need. The second list is the one almost every garden lacks.
Why these get compared
Wild bee conservation advice treats them as one group, and they need different things. A garden good for bumblebees may offer nothing to a solitary bee, and vice versa.
Where they differ
| Axis | Bumblebees | Solitary bees | Why it matters |
|---|---|---|---|
| Social structure | Annual colony — queen, workers, new queens and males | Each female works alone and dies before her offspring emerge | About 250 bumblebee species against roughly 18,000 solitary species. Solitary is the normal way to be a bee. |
| Nesting | Underground in rodent burrows, or at the surface in tussocks | 70% in the ground, the rest in stems, dead wood, walls and shells | Both need undisturbed ground. Cavity nesters are the ones a bee hotel serves. |
| Season | Long — a colony runs from March to September | Short — many fly for four to six weeks only | A solitary bee that emerges when its plant is not flowering has no second chance. This is why they are more vulnerable to timing shifts. |
| Diet breadth | Mostly generalist | Many are specialists on one plant genus | Chelostoma on campanula, Melitta on red bartsia, Andrena florea on white bryony. Generic bee-friendly planting misses them entirely. |
| Pollination style | Buzz pollination; long tongues for deep flowers | Dry pollen carried on hairs, shed readily | Bumblebees do what honey bees cannot on tomatoes and blueberries; mason bees outperform them on orchard fruit. |
| Sting | Can sting, very rarely does | Most are too small to sting meaningfully; males cannot at all | Neither is a practical concern. Solitary bees have no colony to defend, which removes the motive entirely. |
Where the difference is overstated
That solitary bees are less important because they are less visible. They are the overwhelming majority of bee species and include the best pollinators of several crops.
Sources
- Field Guide to the Bees of Great Britain and Ireland — Bloomsbury (2015) · Field guide
- The Bees of the World — Johns Hopkins University Press (2007) · Textbook
- Assessment Report on Pollinators, Pollination and Food Production — Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) (2016) · Systematic review Link
How sources are selected and weighted is set out in the sources and evidence policy.