Bug Identifier
Western Conifer Seed Bug (Nymph)
Community identification

Western Conifer Seed Bug (Nymph)

Leptoglossus occidentalis

Order & Family
Order Hemiptera, Family Coreidae
Size
Adults are 16–20 mm long; nymphs (pictured) are smaller and brightly colored
See this bug in the Encyclopedia

Natural Habitat

Coniferous forests, woodlands, and residential areas near pine, fir, or spruce trees

Diet & Feeding

Feeds on the developing seeds and cones of various conifers by piercing them with a proboscis

Behavior Patterns

Nymphs emerge in summer; they are noticeable for their bright reddish-orange abdomen. They undergo five molts before becoming winged adults. In fall, they often seek shelter in homes for hibernation.

Risks & Benefits

Harmless to humans; they do not bite or sting. They can be a nuisance when entering homes in large numbers. Ecosystem-wise, high populations can reduce the seed yield of conifer trees.