Western Conifer Seed Bug

Natural Habitat

Coniferous forests and woodlands, often found on trees like pines, Douglas-firs, and hemlocks; frequently enters buildings in autumn.

Diet & Feeding

Herbivorous; uses piercing-sucking mouthparts to feed on the sap of developing cones and seeds of various conifers.

Behavior Patterns

They are leaf-footed bugs known for the flattened expansions on their hind legs. They seek warmth in the fall (overwintering), they can produce a pungent odor if disturbed, and they are capable of strong flight.

Risks & Benefits

Generally harmless to humans; they do not bite or sting. They can be a nuisance pest when they congregate in homes. In the ecosystem, they can impact seed production in conifer forests, which may affect forest regeneration.

Identified on: 6/1/2026