Booklouse

Humid environments with high moisture levels, often found in books, cardboard, pantry items, and damp walls where mold or fungi grows.

Microscopic fungi, mold, starch (such as wallpaper paste and book binding glue), and dead insect parts.

Gregarious and fast-moving, they are wingless insects that thrive in high humidity; they reproduce quickly under warm, damp conditions and avoid bright light.

Harmless to humans and pets as they do not bite or spread disease, but they are a nuisance pest that can indicate high moisture levels or damage paper-based goods and dried foods.