Booklice / Barklice

Natural Habitat

Damp, dark, undisturbed areas with high humidity, often found in books, pantries, or under bark

Diet & Feeding

Microscopic mold, fungi, algae, lichen, and organic starchy debris like book glue

Behavior Patterns

Nymphs and adults look similar, often appearing in large numbers in humid conditions; they avoid light and move quickly when disturbed

Risks & Benefits

Harmless to humans and pets as they do not bite; however, they can be a nuisance and may damage starchy materials or contaminate stored dry goods

Identified on: 1/1/2026