Booklouse

Scientific Name: Liposcelis spp.

Order & Family: Psocodea: Liposcelididae

Size: 1 - 2 mm

Booklouse

Natural Habitat

Found in damp, humid environments, especially among books, papers, wallpaper, and stored grain

Diet & Feeding

Feeds on microscopic mold, fungi, starches, and organic glues used in book bindings

Behavior Patterns

Mainly nocturnal and highly active in high humidity; they do not fly but can crawl quickly; population growth is tied to moisture levels

Risks & Benefits

Harmless to humans as they do not bite or spread disease; however, they can be a nuisance and signal a potential mold or humidity issue in the home

Identified on: 1/4/2026