Western Conifer Seed Bug

Natural Habitat

Found primarily in coniferous forests, but often seeks shelter inside buildings or under bark during the winter.

Diet & Feeding

Feeds on the developing seeds and cones of various coniferous trees (such as Douglas fir, pine, and spruce) using piercing-sucking mouthparts.

Behavior Patterns

Nymphs and adults feed on tree seeds throughout summer. In autumn, adults frequently aggregate on south-facing walls and enter homes to hibernate. They are capable of flight and produce a loud buzzing sound.

Risks & Benefits

Harmless to humans as they do not bite or sting, and they do not cause structural damage to homes. However, they can produce a pungent odor if threatened or crushed. They are considered minor forest pests due to reducing seed yields.

Identified on: 4/3/2026