Are Ground Bees Honey Bees? The Key Differences

Ground bees are not honey bees. The two groups are entirely different animals that happen to share the broad label “bee.” Honey bees belong to a single genus, Apis, and live in large perennial colonies inside enclosed cavities or managed hives. Ground bees, by contrast, are a loose collection of thousands of species spread across several bee families, and most of them nest alone in tunnels they dig into bare soil. The differences run deep, from body size and social behavior to how they provision their young, how far they fly for food, and what they contribute to the ecosystem.

What People Mean by “Ground Bees”

“Ground bee” is not a scientific category. It is a catch-all term for any bee that nests in the ground, and that turns out to be a huge number of species. Roughly 70 percent of the world’s bee species are ground-nesters, making it by far the most common nesting strategy among bees. These ground-nesters span multiple families. Mining bees in the family Andrenidae, sweat bees in Halictidae, cellophane bees in Colletidae, and many members of the large family Apidae all dig nests in soil. A DNA barcoding study of Central European bees catalogued 561 species across all six bee families found in the region, illustrating just how diverse bees are beyond the familiar honey bee.¹

Honey bees, on the other hand, represent just a handful of species within the genus Apis. The one most people encounter is Apis mellifera, the western honey bee, which was domesticated thousands of years ago and is now managed worldwide for honey and crop pollination. Honey bees do not dig into the ground. They build vertical wax combs inside sheltered spaces, whether that is a beekeeper’s wooden box, a hollow tree, or a gap in a building wall. When someone sees small bees disappearing into holes in a lawn or garden path, those are ground bees, not honey bees that somehow moved underground.

The Nesting Divide

The clearest physical difference is where and how these bees make their homes. A honey bee colony builds sheets of hexagonal wax comb, sometimes containing tens of thousands of cells for brood and honey storage. The colony is perennial, meaning it overwinters as a group, with workers clustering around the queen to generate heat. That hive can persist for years.

A ground bee’s nest is a tunnel in the dirt, and its architecture depends on whether the species is solitary or has some level of social organization. Researchers using X-ray imaging found that solitary ground-nesters like Colletes cunicularius dig a single, mostly vertical, unbranched shaft roughly 6 mm in diameter. Social ground-nesters like Lasioglossum malachurum build something far more elaborate: a branching, twisting network of tunnels about 3 mm wide, running both horizontally and vertically and containing numerous loops.² Even the complex social burrows are tiny compared to a honey bee hive, typically housing a few dozen individuals at most rather than tens of thousands.

Longevity of the nest also differs. Some solitary ground bee burrows decay within weeks once the adult bee finishes provisioning. Others can remain mostly intact for well over a year. The social species’ burrow networks grow in complexity and size during the active season, then persist in various states of decay through winter.³ A honey bee colony, by contrast, can occupy the same cavity for decades if conditions are right.

Solitary Lives Versus Superorganisms

Honey bees are eusocial, one of the most extreme forms of cooperative living in the animal kingdom. A colony has a single reproductive queen, thousands of nonreproductive female workers that forage, nurse, and defend, and male drones whose sole function is mating. No individual honey bee survives long on its own. The colony functions almost like a single organism.

Most ground bees live the opposite way. A solitary female mates, digs her own burrow, collects pollen and nectar, packs it into a cell at the end of the tunnel, lays an egg on top of the food mass, seals the cell, and repeats the process until her short adult life ends. She never meets her offspring. There is no queen, no worker caste, no division of labor. Each female does everything herself.

Some ground-nesting species fall somewhere in between. Certain sweat bees in the family Halictidae are “primitively social,” sharing a nest entrance with a small group of related females. One female may do most of the egg-laying while others forage, but the arrangement is flexible and nothing like the rigid caste system of a honey bee hive. Bumble bees, which also belong to the family Apidae, sometimes nest underground and form annual colonies with a queen and workers, but these colonies are still far smaller than honey bee colonies and die off each autumn, with only new queens surviving to start fresh the following spring.

Honey Production and Food Storage

One of the most common reasons people wonder whether ground bees are honey bees is the assumption that all bees make honey. They do not. Honey is a product of long-term food storage, something only a few highly social species need. A honey bee colony survives winter as a group by stockpiling concentrated nectar in wax cells, fanning it with their wings to evaporate the water content, and capping the finished honey with wax for storage. This behavior evolved because the colony persists year-round and needs a calorie reserve during months when flowers are not blooming.

Ground bees have no such need. A solitary female provisions each brood cell with a lump of pollen mixed with a small amount of nectar, just enough to feed one larva from egg to pupation. She is not storing surplus food. She is packing a lunchbox for a single offspring. The larva eats the provision, develops inside the sealed underground cell, and in many species spends the winter in a dormant state called diapause before emerging as an adult the following spring or summer. There is no honey, no surplus, and no colony to feed through the cold months.

How Ground Bees Waterproof Their Nests

Nesting underground creates a problem that honey bees never face: moisture. Soil gets wet, and a pollen provision soaked with rainwater would rot long before the larva could eat it. Ground bees have evolved remarkable solutions. Bees in the genus Colletes, sometimes called cellophane bees or plasterer bees, line their brood cells with a transparent, waterproof membrane made of a natural polyester. The raw materials, long-chain hydroxy fatty acids, are stored in a gland and applied to the cell walls in thin layers that harden into a plastic-like coating.⁴ The result is a tiny waterproof capsule embedded in the soil, protecting the food supply and the developing larva from fungal rot and flooding.

Other ground-nesting genera use different strategies, including waxy secretions or compacted soil walls, but the Colletes polyester is one of the most chemically sophisticated examples. It is, as far as anyone knows, the only naturally occurring polyester produced by an insect for structural purposes. Honey bees, by contrast, use beeswax for their comb, which serves a different function: providing a scaffold for brood rearing and honey storage in a dry, above-ground cavity.

Microbial Partners During Winter Dormancy

What happens inside a ground bee’s sealed cell during months of dormancy is more biologically active than you might expect. Research on diapausing solitary bees found that the larvae host symbiotic bacteria and fungi that proliferate dramatically during the dormant period, reaching 33 times and 52 times their initial numbers, respectively. Some of these microbes appear to play a protective role: Streptomyces bacteria isolated from brood cells inhibited the growth of multiple pathogenic fungi, which suggests they help shield the dormant larva from infection during its long underground wait.⁵ Changes in sugar alcohol composition tracked with shifts in microbial abundance, hinting at links between the microbes and the bee’s overwintering metabolism.

Honey bees take a fundamentally different approach to winter. They do not go dormant. The colony stays active inside the hive, vibrating their flight muscles to generate heat and feeding on stored honey. Individual workers die and are replaced, but the colony as a unit never enters diapause. This is one of the starkest biological contrasts between the two groups: ground bees survive winter as individual sleeping larvae protected by soil and microbes, while honey bees survive as an active, food-burning collective.

Foraging Range and Pollination Reach

How far a bee flies for food matters both for its survival and for the plants it pollinates. Honey bees are long-distance foragers, routinely covering several kilometers from the hive and sometimes flying much farther when good nectar sources are scarce. Most ground-nesting bees forage within a far smaller radius. A review of pollinator foraging distances found that with the exception of honey bees, most bees in the family Apidae forage a maximum of about 2 km from their nests, and the majority forage under 1 km.⁶ Many small solitary species stay within a few hundred meters of their burrow.

This shorter range means ground bees are especially sensitive to local landscape quality. If flowers disappear from the immediate area around a nesting aggregation, the bees cannot simply fly to a field five kilometers away the way honey bees can. It also means ground bees tend to be excellent pollinators of whatever is blooming near their nests, visiting the same patches repeatedly and transferring pollen efficiently within a small area. Some ground bees are also buzz pollinators, vibrating their bodies at specific frequencies to shake pollen loose from flowers that honey bees cannot effectively pollinate. A meta-analysis on tomatoes found that buzz-pollinating bees significantly increased fruit weight compared to treatments without buzzing, while non-buzzing bees did not produce the same benefit.⁷ Honey bees are non-buzzing pollinators, so for crops like tomatoes, blueberries, and peppers, ground-nesting bees and bumble bees do work that honey bees simply cannot.

What Ground Bees Do for Soil

Beyond pollination, ground-nesting bees perform a service that honey bees have no part in: they physically alter the soil they nest in. Digging thousands of tunnels in a patch of earth moves and mixes substantial amounts of soil, changing its structure in ways that affect water infiltration, gas exchange, and erosion. A review of this underappreciated role noted that ground-nesting bees alter soil porosity and density during nest construction, and at larger scales they can function as geomorphic agents, influencing surface runoff and soil erosion patterns.⁸

This “ecosystem engineering” role is largely invisible because it happens underground, but it can be ecologically significant in areas where ground-nesting bee aggregations are dense. Some species nest in aggregations of hundreds or even thousands of individual burrows packed into a small patch of bare ground, and the cumulative effect on soil structure is measurable. Researchers have argued that ground-nesting pollinators should be considered part of soil biodiversity, not just above-ground biodiversity, noting that the vast majority of flowering plants depend on pollinators and that protecting pollinator nesting habitat means protecting the soil itself.⁹

Stinging Behavior and Temperament

People who discover ground bees nesting in their yard often worry about being stung, partly because they assume the bees are as defensive as honey bees. In practice, the risk is very different. A honey bee colony has something worth defending: a large store of honey and a queen whose survival determines the colony’s future. Worker honey bees will sting to protect these assets, and because their stinger has barbs that lodge in human skin, each sting is a one-way trip for the bee. That kamikaze defense strategy only makes evolutionary sense in the context of a colony with thousands of expendable workers.

A solitary ground bee has no honey stores and no queen to protect. Her nest contains a few sealed cells with developing larvae, and she is the only adult around. Stinging a large mammal is a massive risk for a solitary bee because if she is killed or injured, her entire genetic legacy can be lost. As a result, most solitary ground bees are docile around people. Many species can sting in theory but almost never do so unless physically grabbed or stepped on. Males, which are often the bees you see flying in erratic patterns low over the ground near nesting sites, cannot sting at all. Those hovering males are looking for mates, not guarding territory.

Ground Bees in Farmed Landscapes

The relationship between ground-nesting bees and agriculture is a two-way street. Farming can either help or harm ground bee populations depending on how the land is managed. A study of bee communities across agricultural landscapes in southeastern Australia found that soil-nesting bees were positively associated with pasture cover, while above-ground-nesting bees were more linked to remnant forest.¹⁰ Converting forest to open agricultural land appeared to favor ground-nesting species that readily forage on crops and weeds, while restricting species that depend on forest for nesting or floral resources. The picture is not simple: some ground-nesting species thrive in agricultural settings, while others are harmed by tillage, pesticide use, and loss of bare-soil nesting sites.

Honey bees, as managed livestock, are deliberately placed in agricultural areas by beekeepers and can be trucked from farm to farm. Ground bees cannot be managed in the same way. Their populations depend on local conditions, especially the availability of suitable nesting soil, which typically means well-drained, sparsely vegetated, sun-exposed patches. Tilling, compacting, or mulching these areas can eliminate nesting sites entirely. This is why conservation advice for ground bees often focuses on leaving undisturbed patches of bare ground in gardens and field margins rather than on building nest boxes, which work for cavity-nesting species but are useless for soil-nesters.

Cuckoo Bees and Underground Nest Parasites

Ground bee nests face threats that honey bee hives do not. One of the most interesting is cleptoparasitism by cuckoo bees. Cuckoo bees are species that have lost the ability or inclination to build their own nests. Instead, a female cuckoo bee sneaks into a ground bee’s burrow while the host is out foraging, lays her own egg on or near the host’s pollen provision, and leaves. When the cuckoo bee larva hatches, it typically kills the host’s egg or larva and eats the food supply. Observations of the cuckoo bee Mesonychium asteria in Brazil documented females overflying nesting aggregations of their host species, Centris xanthomelaena, and attacking nests. Researchers confirmed the parasitic relationship by finding adult cuckoo bees emerging from the host’s nests and cuckoo bee larvae inside host brood cells.¹¹

Honey bee hives have their own parasites, most infamously the Varroa mite, but the dynamics are different. A honey bee colony can tolerate a certain level of parasitism because it produces thousands of offspring. A solitary ground bee investing everything in a handful of brood cells can lose her entire reproductive output to a single cuckoo bee visit. The arms race between ground-nesting hosts and their cuckoo bee parasites has driven the evolution of behaviors like nest guarding, rapid cell sealing, and the use of volatile chemical compounds that may deter intruders.

How to Tell Them Apart in Your Yard

If you see bees entering and leaving small holes in the ground, you are almost certainly looking at ground bees. Honey bees do not nest in soil. A few practical clues can help you confirm what you are dealing with:

Nest entrance: Ground bee holes are typically pencil-width or smaller, often surrounded by a tiny mound of excavated soil. Honey bee colonies enter through a larger opening in a tree, wall, or hive box.
Numbers: A ground bee aggregation can look alarming because dozens or hundreds of individual holes may be clustered in a small area, but each hole belongs to a single female. A honey bee colony sends thousands of workers through a single entrance.
Body shape: Many common ground bees, like mining bees, are slightly smaller and fuzzier than honey bees, often with conspicuous pollen-collecting hairs on their hind legs or abdomen. Honey bees have a distinctive “waist” and carry pollen in smooth, shiny baskets on their hind legs called corbiculae.
Season: Many ground bee species are active for only a few weeks in spring, timed to specific wildflower blooms. Honey bees forage from early spring through late autumn.
Behavior at the nest: Ground bees fly low and slow near their burrow entrances. Honey bees leaving a hive tend to fly upward quickly and head off in a beeline toward a food source.

If you find a ground bee aggregation in your yard, the standard advice from entomologists is to leave it alone. The bees are not aggressive, they are beneficial pollinators and soil aerators, and most species will finish their nesting cycle and disappear within a few weeks. Watering the area heavily can encourage them to relocate if their presence is genuinely problematic, since most ground bees prefer dry, well-drained soil. Pesticides are unnecessary and counterproductive, killing pollinators that are doing you and your garden a favor.