
Community identification
Wheel bug (juvenile)
Arilus cristatus
- Order & Family
- Hemiptera; Reduviidae (assassin bugs)
- Size
- Nymphs are about 6–12 mm long; adults typically measure 24–36 mm.
Natural Habitat
Found on trees, shrubs, gardens, and building exteriors across much of North America, especially in wooded or residential areas.
Diet & Feeding
Predatory; nymphs and adults pierce caterpillars, beetles, aphids, and other insects with a stout beak, liquefying and sucking their tissues.
Behavior Patterns
Nymphs are wingless and often reddish-brown with long legs and antennae; they molt through several stages before becoming adults. They are generally solitary and may be active during the day.
Risks & Benefits
Beneficial predators that help suppress many garden and forest pests. They can deliver a painful defensive bite if handled, but are not medically dangerous and do not normally seek human contact.