Western Conifer Seed Bug

Natural Habitat

Coniferous forests, urban and suburban areas, often found on pines, firs, and spruces. They seek shelter in human structures during colder months.

Diet & Feeding

Feeds on the developing seeds and sap of conifers, primarily pines and firs. They use their piercing-sucking mouthparts to extract fluids.

Behavior Patterns

They are known for overwintering indoors in cracks and crevices of homes and other buildings. They are clumsy flyers and can produce a pungent, pine-like odor when disturbed, which is a defense mechanism. They are active during warmer months, primarily on conifer trees.

Risks & Benefits

Risks: Considered a nuisance pest due to their tendency to enter homes in large numbers in autumn seeking shelter, and the foul odor they emit when threatened. They do not bite, sting, or cause structural damage. Benefits: Generally considered a neutral or minor pest in their native range; however, in areas where they have been introduced, they can sometimes cause minor damage to conifer seed crops.

Identified on: 10/8/2025