Common Booklouse

Natural Habitat

Indoor environments with high humidity, specifically kitchens, pantries, and libraries where mold or fungi can grow.

Diet & Feeding

Microscopic mold, fungi, algae, and organic starches such as book bindings or wallpaper paste.

Behavior Patterns

Active year-round in temperature-controlled environments. They are flightless and move in a jerky, scurrying fashion. They reproduce through parthenogenesis (females produce eggs without mating).

Risks & Benefits

They do not bite or transmit diseases to humans. They are primarily a nuisance and can be an indicator of high humidity or moisture problems. They can contaminate and spoil stored food products.

Identified on: 1/1/2026