
Community identification
Assassin bug (likely wheel bug nymph)
Arilus cristatus
- Order & Family
- Hemiptera; Reduviidae
- Size
- Nymphs are about 5–15 mm; adults reach roughly 25–36 mm.
Natural Habitat
Vegetation, gardens, woodland edges, and occasionally buildings, especially across much of eastern and central North America.
Diet & Feeding
Predatory; it pierces caterpillars, beetles, flies, and other insects with a stout beak, then sucks their liquefied contents.
Behavior Patterns
Usually solitary and slow-moving, hunting by ambush or stalking. Immature stages molt several times before becoming adults; adults may fly but often remain on vegetation.
Risks & Benefits
Beneficial biological-control predator that reduces pest insects. It can deliver a painful defensive bite if handled, but is not considered medically dangerous.