Booklouse (psocid), likely a barklouse

Moist indoor areas, especially bathrooms, kitchens, cupboards, window frames, and places with mold or stored paper. Outdoors they occur on bark, leaf litter, and fungi.

Feeds mainly on mold, fungi, algae, and microscopic organic debris rather than biting people or damaging sound materials.

Small, soft-bodied, slow-moving insects often found singly or in groups in humid conditions. Populations increase with moisture and usually decline when areas are dried and ventilated.

Harmless to humans and pets, with no sting or blood-feeding behavior. They help consume fungi and organic debris, though indoor presence indicates excess humidity and possible mold.