Straight answers from a licensed New York exterminator and Associate Certified Entomologist (ACE) — serving all five boroughs, in English and Spanish.
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Quick answer: Booklice (also called psocids) are tiny (1–2 mm), soft-bodied, pale or translucent insects found in damp areas — on books, paper, wallpaper, walls, window frames, and in stored food. They are not true lice, don’t bite, and don’t harm people or pets. They feed on microscopic mold, so their presence is really a humidity signal. They’re often mistaken for bed bug nymphs or baby roaches.
What booklice look like
Almost too small to see clearly: pale gray, cream, or translucent, with a soft body and (in some) long antennae. You’ll notice them as tiny moving specks on damp paper, book bindings, windowsills, or pantry shelving, often in numbers.
Booklice vs. bed bugs
Because they’re tiny and pale, booklice get confused with baby bed bugs. The difference: booklice are found in damp spots (books, paper, walls, food), not in the bed, and they don’t bite. No bites + damp location + paper/mold = booklice. See also bugs that look like bed bugs.
Why you have booklice
They eat mold and mildew, so they thrive wherever there’s humidity — new construction that’s still drying, damp basements, bathrooms, around windows, and in stored grains or old books. A booklice bloom almost always means moisture.
How to control booklice
Lower the humidity: ventilate and dehumidify, fix leaks and condensation, discard or dry out mold-affected paper and food, and wipe down affected areas. Once humidity drops below the level mold needs, booklice die off. Recurring populations point to an ongoing moisture problem.
Tiny specks on your walls or books? New York Exterminating can confirm they’re harmless booklice and address the moisture, led by an Associate Certified Entomologist (ACE). Call (347) 210-4646 or request a free assessment.
A Brooklyn-based, NYSDEC-registered company (Reg. #15140) led by Jorge Bedoya, an Associate Certified Entomologist (ACE). For pests in your home or building, NYE provides IPM-based, low-exposure control matched to the exact pest and verified with a follow-up. ACE-led work comes with a client portal of service reports and photos, fully bilingual service, and no long-term contract.
Booklice — FAQ
Do booklice bite?
No. Booklice don’t bite people or pets and aren’t true lice. They feed on mold.
Are these booklice or bed bugs?
Booklice are found on damp paper, walls and food and don’t bite; bed bugs are in the bed and bite. No bites plus a damp, papery location means booklice.
Why do I suddenly have booklice?
They bloom in humidity, feeding on microscopic mold — common in new/damp buildings, bathrooms, basements and around windows.
How do I get rid of booklice?
Reduce humidity with ventilation and a dehumidifier, fix leaks, and remove mold-affected items. They disappear once it dries out.
