Assassin Bug
Beneficial insect · Predator
Assassin bugs are predatory true bugs that capture a wide range of insect prey in gardens and natural areas. They use a piercing beak to immobilize and feed on other insects. Several species occur in the United States, including forms that blend well with bark or foliage.
How to identify it
Adults are usually elongated with long legs, a narrow head, and a stout curved beak tucked beneath the body. Color varies by species and may be brown, gray, black, green, or patterned. Nymphs resemble smaller wingless adults and can be brightly colored or oddly shaped depending on the species.
How it helps your garden
Assassin bugs feed on caterpillars, beetles, leafhoppers, stink bugs, and other insects that can damage garden plants. They are generalist predators and can help reduce a mix of pest species. Their hunting is especially useful in diverse plantings where prey types change over the season.
How to attract it
Provide a varied garden with shrubs, perennials, ground cover, and layered structure for ambush sites. Leave some leaf litter, stems, and less-disturbed edges where they can shelter and find prey. Include flowering plants to support the broader insect community that sustains them. Offer shallow water or maintain some humid refuge areas during dry weather.
Tips
Avoid handling assassin bugs because some species can defend themselves with a painful bite if pressed. Learn the look of their nymphs as well as adults, since both are beneficial. They are most useful when the garden supports a broad food web rather than a single crop.
General guidance for US gardens. Broad insecticide sprays harm beneficial insects along with pests; for a local pest-management plan, contact your Cooperative Extension office. Page updated Aug 4, 2026.