Book louse / Bark louse

Humid environments, damp books, wallpaper, stored grains, and under tree bark

Microscopic fungi, mold, starch in book glue, and organic debris

Gregarious insects that thrive in high humidity; they reproduce via simple metamorphosis and are often found in dark, undisturbed areas.

Harmless to humans as they do not bite or transmit disease, but are considered pests when they damage book bindings or contaminate stored food products.