Booklouse (or Psocid)

Found in high-humidity areas indoors, such as bathrooms, kitchens, and basements. They inhabit books, wallpaper, stored grains, and fabrics where mold can grow.

Feeds on microscopic mold, fungi, starch, grain, and wallpaper paste/glue.

They do not fly but run in quick, jerky movements. They proliferate in damp conditions and are often seen on walls, books, or furniture.

Risks: Generally considered a nuisance pest; they do not bite humans or animals and do not transmit disease, though large populations can trigger allergies. Benefits: None in a household context.