Western Conifer Seed Bug

Natural Habitat

Found in coniferous forests on trees such as pine, Douglas fir, and hemlock. They frequently enter human dwellings in the fall to seek warmth for overwintering.

Diet & Feeding

Herbivorous. They use their piercing-sucking mouthparts to feed on the developing seeds and cones of several species of conifers.

Behavior Patterns

They are known for a 'see-saw' walking motion and can produce a pungent odor when disturbed. They are strong fliers and are attracted to the warmth of buildings during cold months.

Risks & Benefits

They are harmless to humans and do not bite, sting, or carry diseases. However, they can be a nuisance when they enter homes in large numbers. In their natural ecosystem, they are part of the food web for birds and small mammals.

Identified on: 1/1/2026