Bug Identifier
Western Conifer Seed Bug
Community identification

Western Conifer Seed Bug

Leptoglossus occidentalis

Order & Family
Hemiptera, Coreidae
Size
15 to 20 millimeters in length
See this bug in the Encyclopedia

Natural Habitat

Conifer forests natively, but frequently invades residential homes seeking shelter during autumn.

Diet & Feeding

Feeds on the developing seeds and cones of pine, Douglas-fir, and other conifer trees using piercing-sucking mouthparts.

Behavior Patterns

Active flyers during warm months that congregate on sunny exterior walls in autumn before overwintering indoors. Releases a pungent, foul-smelling odor when disturbed.

Risks & Benefits

Harmless to humans as they do not bite, sting, or transmit diseases, and cause negligible damage to mature trees, but can become a significant household nuisance.