Booklouse (barklouse)

Warm, humid indoor areas, especially cupboards, stored paper, cardboard, and pantry goods. They favor mold or fungal growth.

Feeds mainly on microscopic fungi, mold spores, algae, and organic debris. It does not chew wood or normally bite people.

Slow-moving and often found in groups in damp materials. Populations increase with humidity and decline when materials are dried; some species reproduce without males.

Harmless to humans and pets, causing no bites or disease transmission. Large infestations indicate excess moisture and may contaminate or damage stored paper and food packaging; they also help consume fungal debris.