On a hot summer afternoon in Boonton, you might notice tiny bees landing on your arms, neck or legs while you work in the yard. They aren't trying to sting you. They're after the salt and moisture in your sweat, which is how sweat bees got their name. Most of the time they're harmless, and like other native bees they help pollinate gardens and wildflowers. Below, we'll explain what sweat bees are, how worried you should be and how to keep them from bugging you. If you're not sure whether you're dealing with bees or something more aggressive, our bee removal team can identify it for you.
What Sweat Bees Are
"Sweat bee" is a common name for a large family of small bees. Many are smaller than a honey bee. Some are a bright metallic green or blue-green, while others are dark brown or black, sometimes with pale bands on the abdomen. They're easy to mistake for flies or tiny wasps because they're so small and quick.
Sweat bees feed on pollen and nectar like other bees. Landing on people is a side habit. Sweat gives them moisture and salts, so they're most noticeable on hot, humid days when you're outside and active.
Why Sweat Bees Show Up Around Your Home
Most sweat bees nest in the ground. A female digs a narrow tunnel in bare or thinly covered soil and builds cells for her young at the bottom. Many species are solitary, though some nest in loose groups, so you may see several small holes in the same patch of dirt. Sunny, dry spots with little grass cover are favorites. That can include thin areas of lawn, garden beds, the edges of walkways and bare ground along the foundation.
Flowers bring them in too. Gardens, flowering shrubs and clover in the lawn give sweat bees plenty of food, so a yard full of blooms will naturally see more of them.
You'll notice sweat bees most in the warm months, especially during hot, humid stretches of summer when you're outside and sweating. Activity tapers off as the weather cools in fall. They're part of the native pollinator community that keeps gardens, fruit trees and wildflowers productive, so tolerating a few is usually the best trade-off.
How To Tell Sweat Bees From Other Stinging Insects
The insect most worth ruling out is the yellow jacket, which also nests in the ground and is far more defensive. Our wasp, bee and hornet identification guide covers the details, but here are the basics.
| Sweat Bee | Yellow Jacket | |
|---|---|---|
| Size | Small, often smaller than a honey bee | Larger, with a narrow waist |
| Color | Often metallic green, or dark brown to black | Bright yellow and black |
| Nest | Many small holes, each used by one female | One entrance with heavy, constant traffic |
| Behavior | Lands on skin for sweat, rarely stings | Defends nest aggressively, drawn to food and trash |
Do Sweat Bees Sting?
Female sweat bees can sting, but they rarely do. A sting usually happens when a bee gets pressed against your skin, caught in a sleeve or swatted. Males can't sting at all. For most people the sting is mild and fades quickly. As with any bee, anyone with a known bee sting allergy should be careful, and if a sting causes swelling beyond the sting site or trouble breathing, see a doctor right away.
So should you be worried? For most households, no. Sweat bees are a summer nuisance, not a danger to your home. They don't damage wood or structures, and they don't build large colonies that defend a nest the way yellow jackets do.
How To Keep Sweat Bees Away
- Don't swat. Brushing a bee off gently or just letting it fly away is the best way to avoid a sting.
- Wipe off sweat. Keep a towel handy when you work outside and wear long, light sleeves on hot days.
- Cover bare soil. Mulch, ground cover or a thicker lawn gives ground-nesting bees fewer places to dig. Watering dry, bare patches also makes them less attractive.
- Check before you sit. Look over outdoor cushions and towels before you sit or lie on them.
- Skip the spray. Broad insecticide treatments harm pollinators and rarely solve the problem, since new bees simply move in from nearby.
When To Call A Professional
Call a pro when you can't tell whether the insects are sweat bees or yellow jackets, when nesting is concentrated next to a doorway, patio or play area, or when someone at home has a sting allergy. EcoFusion's NJ DEP-licensed technicians identify the insect first and use Integrated Pest Management, so any treatment targets only the problem and spares the pollinators that aren't causing trouble. A technician can also tell you whether the holes in your yard belong to bees at all. Ants and other insects dig in bare soil too, and the right fix depends on what's actually there.
Sweat bees are small, curious and mostly harmless. A few changes to your yard and habits will keep them from becoming a bother. If you're seeing heavy ground-nesting activity around your Boonton home and want to know exactly what it is, EcoFusion Pest Control can take a look.