Wheel bug vs Masked hunter
These two are easy to mix up. Here's how to tell a wheel bug from a masked hunter, and whether either one bites or stings.
Wheel bug
Arilus cristatus
Masked hunter
Reduvius personatus
≠The key differences
Wheel bug is much larger (up to 35 mm or more) and has a distinctive toothed 'wheel' crest on the thorax; masked hunter is smaller and lacks the crest.
⚖︎Side by side
| Wheel bug | Masked hunter | |
|---|---|---|
| To humans | Painful bite | Painful bite |
| Size | 25-40 mm body length (about 1-1.6 inches) | 17-22 mm body length |
| Colours | Gray-brown, Reddish-brown, Black | Dark brown, Black, Pale brown (nymph body) |
| Family | Reduviidae | Reduviidae |
| Habitat | Woodland edges, hedgerows, gardens, orchards, and shrubby areas where insects are abundant; often found on tree trunks, plant stems and fences. | Woodland edges, under bark, in bird nests, woodpiles, and inside buildings (sheds, houses) where insect prey is available |
| Range | Widely distributed across the eastern and central United States, west to Texas, and south through Mexico to Central America. | Native to Europe; also established in North America and other temperate regions where it has been introduced |
| Active | Most active in late spring through early fall; diurnal and crepuscular (active by day and at dusk). | Mostly active spring to autumn; primarily nocturnal and crepuscular but may be seen daytime when disturbed |
| Pest? | No | No |
🔍How to spot a wheel bug
- Look for the semicircular, toothed 'wheel' or crest on the pronotum behind the head — unique in its region.
- Large, elongate body 25-40 mm with rough, mottled gray-brown coloration and folded wings.
- Nymphs are reddish-orange when young and lack the wheel crest (wheel develops only in adults).
- Long, three-segmented proboscis (beak) folded under the head used for piercing prey.
🔍How to spot a masked hunter
- Adult body length about 17-22 mm with elongated, flattened profile and a narrow neck behind the head
- Long, three-segmented beak (rostrum) held under the head used for piercing prey
- Nymphs often dressed in a conspicuous coating of dust and lint they gather, making them look fuzzy or camouflaged
- Generally dark brown to black adults with long spindly legs; not brightly colored
?Frequently asked questions
What is the difference between a wheel bug and a masked hunter?
Wheel bug is much larger (up to 35 mm or more) and has a distinctive toothed 'wheel' crest on the thorax; masked hunter is smaller and lacks the crest.
Is a wheel bug or a masked hunter more dangerous?
Wheel bug: Painful bite. Masked hunter: Painful bite. Wheel bugs are not aggressive but can deliver a very painful stab-like bite when handled or crushed. Masked hunters are predators and do not seek out people, but they can deliver a painful stab-like bite if handled or trapped against skin.
Identification from photos is never certain: don't handle insects you can't identify, and get medical advice for bites, stings or allergic reactions.