Western Conifer Seed Bug

Natural Habitat

Typically found in coniferous forests and woodlands, but also common in suburban and urban areas where conifers are present. They often enter homes in the fall to overwinter.

Diet & Feeding

Mainly conifer seeds and sap, but they may also feed on the sap of deciduous trees and fruits.

Behavior Patterns

They are active during the day and are often found on or near their host plants. They can emit a strong, unpleasant odor when disturbed, which is a defense mechanism. They overwinter as adults, often seeking sheltered locations like under bark or in buildings.

Risks & Benefits

Potential Risks: Considered a nuisance pest when they invade homes in large numbers during the fall and winter. They do not bite or sting humans, but their defensive odor can be unpleasant. They can cause minor damage to conifer seeds or young cones, but generally not a significant agricultural pest. Potential Benefits: They are part of the natural food chain and can serve as a food source for birds and other predators.

Identified on: 8/28/2025