Psocid (often called Booklouse)

Starchy and damp environments, including old books, wallpaper, stored food products, and damp areas of homes with high humidity.

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

They are scavengers that thrive in high humidity (>60%). They do not fly and are often found in large numbers if conditions are damp; their life cycle is about 25 to 110 days depending on temperature.

They do not bite humans or pets and do not spread disease. They are primarily a nuisance and a sign of excess moisture or mold, though they can contaminate stored pantry goods.