Carpet Beetle Larvae Identification
Tiny hairy 'worms' and hollow shed skins along baseboards, in closets, or in bedding are usually carpet beetle larvae. Upload a photo and our free AI confirms it in seconds and rules out bed bugs and clothes moths.
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How to Identify Carpet Beetle Larvae
Check these features before you rely on any single one โ the combination is what confirms the ID.
Carpet beetle larvae are about 1/8 to 1/4 inch long and covered in bristly hairs. Varied carpet beetle larvae are striped light and dark brown and widest at the rear, with tufts of hair at the tail.
Black carpet beetle larvae are golden-brown to dark brown, shiny, and tapered like a carrot, with a long tuft of hairs at the tail end. They move slowly and curl up when disturbed.
Larvae molt many times, leaving hollow, hairy, light-brown skins that look like the larva itself. Finding these husks under furniture, along baseboards, or in closets is often the first sign.
They eat animal-based materials: wool rugs and sweaters, silk, felt, fur, feathers, leather, pet hair, lint, and dead insects. Check under furniture, inside closets, air vents, and stored clothing.
Irregular holes and thin, bare patches in natural-fiber fabrics and rugs, often along seams and folds. Unlike clothes moths, carpet beetles leave no silk webbing or tubes.
Adults are small, round beetles, 1/16 to 1/8 inch. Varied carpet beetles are mottled white, brown, and yellow; black carpet beetles are shiny and dark. They're often seen at windows in spring.
Carpet Beetle Larvae and Their Look-Alikes
Carpet Beetle Larvae
Fuzzy, banded or carrot-shaped, slow-moving, with lots of shed skins nearby. They don't bite, but their hairs can cause an itchy, bumpy rash that's often mistaken for bed bug bites.
Bed Bug
Flat, oval, reddish-brown, and smooth with no hairs; hides in mattress seams and bites at night. Leaves rusty or black spots on sheets. A very different shape from a hairy larva.
Clothes Moth Larva
Creamy-white caterpillar with a brown head, often inside a silky tube or case, with webbing on the fabric. Also damages wool, but carpet beetle larvae are hairy and brown.
Larder Beetle Larva
A larger relative, up to 1/2 inch, dark and hairy, found near pet food, meat products, and dead animals or insects in walls.
Woolly Bear Caterpillar
Much larger (1โ2 inches), black and rusty-orange banded caterpillar found outdoors in fall. Harmless, and not a household pest.
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Frequently Asked Questions
Sources & References
Our identification guides are researched from the authorities below and reviewed by the IdentifyThis team. AI photo identification is a helpful starting point โ for anything involving safety (venomous species, edibility, or medical symptoms), always confirm with a qualified expert before acting.
- CDC โ Pest- and health-related guidance
- EPA โ Integrated pest management
- UC IPM โ University of California Pest Notes
- BugGuide โ Entomology identification community
- Smithsonian โ Insect & animal biology
Reviewed by the IdentifyThis team ยท Last updated August 2026