Bed Bug Identification — Is This a Bed Bug?
Upload a photo and our free AI tells you in seconds whether it's a bed bug or a harmless look-alike like a carpet beetle. Catching an infestation early — before it spreads — makes it far easier to treat.
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Confirm Early — Bed Bugs Spread Fast
Bed bugs don't transmit disease, but an untreated infestation grows quickly and is difficult and expensive to eliminate once established. If you confirm bed bugs, avoid moving belongings between rooms (which spreads them) and consider a licensed pest-control professional. AI identification is a fast first check — not a substitute for a professional inspection when an infestation is suspected.
How to Identify Bed Bugs
Check these features before you rely on any single one — the combination is what confirms the ID.
Adult bed bugs are about 4–5mm — the size and flattened oval shape of an apple seed. Unfed, they're a flat reddish-brown; after feeding they swell into a rounder, darker, elongated shape. If it's flat and oval, take a closer look.
Bed bugs are rusty reddish-brown with a banded, segmented abdomen. They have tiny wing pads but cannot fly or jump — if it flew or hopped, it isn't a bed bug. They crawl, relatively slowly.
Check mattress seams and tags, the box spring, headboard cracks, and where the wall meets the bed. Bed bugs stay within a few feet of where people sleep, tucked into tight seams and crevices during the day.
Even without seeing a live bug, look for tiny rust or dark-brown spots (digested blood) on sheets and mattress seams, pale translucent shed skins, and clusters of tiny pale eggs. These are often the first evidence.
Young bed bugs (nymphs) are much smaller and translucent yellow-white, becoming redder after a blood meal. Their small size makes them easy to confuse with booklice or carpet beetle larvae — a photo helps confirm.
Bed bug bites often appear as itchy red welts in a line or small cluster on skin exposed while sleeping — arms, shoulders, neck, and legs. Bites alone can't confirm bed bugs (many things bite), but combined with the physical signs they're strong evidence.
Look-Alikes: How to Tell Them Apart
Carpet Beetle (larva & adult)
The number-one false alarm. Adult carpet beetles are rounder and mottled black/brown/white; the larvae are fuzzy and bristly. They live near carpets and closets, damage fabric, and do NOT bite people. Bed bugs are smooth, flat, oval, and live by the bed.
Booklice (Psocids)
Much smaller, pale, and fast-moving near damp paper, books, and mould. Frequently mistaken for bed bug nymphs, but they don't bite and indicate humidity, not an infestation.
Bat Bug
Nearly identical to bed bugs and a genuine bite risk — the difference is only visible under magnification (longer hairs on the upper body). Bat bugs come from bats roosting in the attic or walls, so identification points to a different source that also needs addressing.
Spider Beetle
Reddish-brown and roughly bed-bug-sized, but with a shiny, rounded, spider-like body and long legs and antennae. Found in pantries and storage, not beds; harmless scavengers of dried food and debris.
Cockroach Nymph
Young cockroaches are small and brown and can startle people into thinking bed bug, but they're faster, more elongated, have longer legs and antennae, and run for cover in kitchens and bathrooms rather than living in the bed.
Flea
Also bites and is reddish-brown, but fleas are laterally flattened (thin side-to-side, not top-down), jump powerfully, and are associated with pets. Bed bugs are flattened top-down and cannot jump.
Bitten but never saw the bug? Our free picture identifier identifies insects and analyzes bite photos with the same AI to help pin down the cause.