Booklouse

High-humidity indoor environments such as libraries, kitchens, bathrooms, under wallpaper, or inside stored grains.

Feeds primarily on microscopic mold, fungi, algae, and starchy organic matter like book bindings or wallpaper paste.

Fast-running, wingless insects that thrive in damp conditions; they reproduce rapidly but are generally secretive and avoid light.

They do not bite or transmit diseases to humans but can be a nuisance and potentially damage paper goods or contaminate stored food when populations are high.