Western Conifer Seed Bug

Natural Habitat

Originally from western North America, now widespread across North America, Europe, and Asia. They are typically found in coniferous forests and around buildings in residential areas during colder months.

Diet & Feeding

Primarily feeds on developing seeds of conifers, such as pines, firs, spruces, and hemlocks. They use their piercing-sucking mouthparts to extract sap from cones and needles.

Behavior Patterns

Adults overwinter in sheltered locations, often entering homes and other structures in the fall. They are strong fliers and are attracted to light on warm days. They produce a foul-smelling liquid when disturbed.

Risks & Benefits

Generally considered a nuisance pest when they enter homes in large numbers. While they do not bite or sting, their presence can be alarming, and they can release an unpleasant odor. They are not known to transmit diseases to humans or pets. In coniferous forests, they can cause some damage to developing seeds, but typically not to an extent that threatens the health of the tree or forest.

Identified on: 11/13/2025