Booklouse (Barklouse)

Damp, high-humidity indoor environments such as libraries, kitchens, wall voids, and bathrooms; also found under bark or in bird nests outdoors.

Feed primarily on microscopic mold, fungi, algae, lichen, and starchy organic matter like book glue and wallpaper paste.

Gregarious insects that thrive in humid conditions; they are wingless and move with a characteristic jerky, scurrying motion. They do not undergo a pupal stage.

Harmless to humans and pets as they do not bite or transmit disease; however, they are considered a nuisance pest that can indicate high moisture levels or damage starchy household items.