Booklouse

Damp, warm environments with high humidity; often found in books, pantries, or under wallpaper.

Microscopic mold, fungi, algae, and organic starchy materials like book glue or grains.

Mostly nocturnal and very fast runners that avoid light; they do not fly and have no wings in many indoor species.

Harmless to humans as they do not bite or transmit disease, but are considered a nuisance pest and an indicator of high humidity or moisture problems.