Do Wheel Bugs Bite? Are They Dangerous?
Short answer: the wheel bug can bite or sting, usually with mild, local effects. Its bite is extremely painful and can take days or weeks to heal, so avoid handling it.
Risk rating: Can bite or sting
Its bite is extremely painful and can take days or weeks to heal, so avoid handling it.
Are wheel bugs dangerous to humans?
Its bite is extremely painful and can take days or weeks to heal, so avoid handling it.
On our four-level scale, the wheel bug is rated can bite or sting, meaning it can bite or sting, usually with mild, local effects. Wheel Bugs can bite, so it is worth handling them with care.
Are they dangerous to pets?
Wheel Bugs can bite or sting curious pets that paw at them or try to eat them. Watch for swelling, drooling or limping, and call your veterinarian right away if your pet has trouble breathing or a large reaction.
Can they damage your home or garden?
Wheel Bugs don't damage homes or gardens in any meaningful way.
What to do if you are bitten
- Wash the area with soap and water.
- Apply a cool compress to reduce swelling.
- Use an over-the-counter antihistamine or hydrocortisone cream for itching, following the label.
- Avoid scratching, which can lead to infection.
Call 911 right away if someone has trouble breathing, swelling of the face or throat, dizziness or a racing heartbeat after a bite or sting.
How to identify wheel bugs
A large, gray assassin bug with a raised, toothed crest on its back that looks like half a gear wheel. It hunts caterpillars and beetles and is a garden ally.
- Semicircular, cog-like crest on the thorax
- Long, narrow head with a curved beak
- Slow, deliberate movement on plants
| Scientific name | Arilus cristatus |
|---|---|
| Group | True Bugs |
| Size | 25–38 mm (up to about 1.5 in) |
| Colors | Gray and Brown |
| Legs | 6 legs |
| Wings | Yes |
| Where found | Garden or plants and Trees or shrubs |
| Most active | Summer and Fall |
| Bites | Yes |
| Stings | No |
| Risk level | Can bite or sting |
When you'll see wheel bugs
Wheel Bugs are most active in summer and fall. Summer heat speeds up development, so populations can grow quickly. In fall, many bugs look for shelter, and some move toward or into buildings.
Typical places to check: garden or plants and trees or shrubs.
About true bugs
The wheel bug is one of the true bugs. True bugs have piercing, straw-like mouthparts used to suck plant sap or, in a few species, blood. They develop through gradual metamorphosis: nymphs look like small, wingless adults and molt several times as they grow. Many release strong odors from scent glands when threatened.
Because nymphs look like adults, you'll often see mixed sizes of the same bug together, which is a good sign that a population is breeding nearby.
How to avoid problems with wheel bugs
You don't need to control wheel bugs. If one is in the way, gently move it outdoors with a cup and a piece of paper. Its bite is extremely painful and can take days or weeks to heal, so avoid handling it.
Frequently asked questions
Do wheel bugs bite?
Yes. Its bite is extremely painful and can take days or weeks to heal, so avoid handling it.
Do wheel bugs sting?
No, wheel bugs do not sting.
Are wheel bugs poisonous?
The wheel bug can bite or sting, usually with mild, local effects. Its bite is extremely painful and can take days or weeks to heal, so avoid handling it.
Where do wheel bugs live?
Wheel Bugs are usually found in gardens and on plants and on trees and shrubs, and are most active in summer and fall.