Western Conifer Seed Bug
Scientific Name: Leptoglossus occidentalis
Order & Family: Order: Hemiptera, Family: Coreidae
Size: 16 to 20 mm (0.6 to 0.8 inches)
Natural Habitat
Coniferous forests, but often seeks shelter in human structures during winter months
Diet & Feeding
Nymphs and adults feed on the sap of developing seeds and cones of several species of conifers
Behavior Patterns
Diurnal insects known for seeking overwintering spots indoors and emitting a strong odor when disturbed or crushed
Risks & Benefits
Harmless to humans as they do not bite or sting, but they are considered a nuisance pest indoors and can impact the seed production of conifer crops
Identified on: 3/3/2026