Likely booklouse (barklouse)

Humid indoor areas, stored foods, books, and moldy surfaces; related species live on bark and foliage.

Molds, fungi, algae, and microscopic organic debris; some feed on starchy materials in stored goods.

Small, soft-bodied insects that favor damp conditions; indoor populations can increase where mold is present.

Harmless to people and pets and do not bite; large numbers can contaminate stored foods or signal excess moisture.