Household pests
Carpet beetle and its larvae: identify and get rid of them
Carpet beetles are small, rounded, mottled beetles whose hairy larvae, known as woolly bears, eat wool, fur, feathers and other natural fibres. The adults are harmless and often seen near windows, but the larvae damage carpets, clothes and stored items. Thorough cleaning and removing infested material usually clears them.
- Also known as
- varied carpet beetle, Anthrenus, woolly bears (the larvae)
- Easily confused with
- clothes moth larvae (cause similar fabric damage), ladybird larvae, bed bugs (bites are sometimes confused)
- How serious
- Low to moderate: harmless to people, damaging to natural fabrics
- Typical cost
- DIY cleaning is low cost; professional treatment typically from around 90 to 200 pounds depending on rooms
How to identify carpet beetle
Adult carpet beetles are 2 to 4mm long, rounded like a small ladybird, with a mottled pattern of black, white, brown and yellow scales. They fly and are often found on windowsills as they head to the light.
The damaging stage is the larva, a 4 to 5mm hairy, brown and cream banded grub that curls up when disturbed. Look for shed larval skins, plus bare patches and irregular holes in wool carpets (especially under furniture and along skirting), and damage to jumpers, blankets, fur and feathers.
How serious is it?
Low to moderate: harmless to people, damaging to natural fabrics
Carpet beetles do not bite people and do not spread disease. Some people react to the larval hairs with an itchy rash that can be mistaken for bites, but this is irritation, not an infestation of the skin.
The cost is to your belongings. Larvae can quietly ruin wool carpets, natural-fibre clothing, blankets, taxidermy and museum-type items. Damage tends to appear in undisturbed places: under heavy furniture, in wardrobes and in stored boxes.
How to fix it yourself
- Find the source. Lift rugs and furniture and check carpet edges, wardrobes, stored woollens and any old bird or rodent nests in lofts, which feed larvae.
- Vacuum thoroughly and often, including carpet edges, under furniture and inside wardrobes, then empty the vacuum outside.
- Wash or dry clean affected fabrics. A hot wash, or freezing items at minus 18 for several days, kills eggs and larvae in clothing.
- Remove badly infested carpet or items that cannot be cleaned.
- Store clean woollens in sealed bags or boxes, and use insect-proof storage for items you rarely use.
When to call a professional
- A widespread infestation across several rooms that returns after cleaning.
- Recurring damage where you cannot find or reach the source, for example under fitted units or in inaccessible voids.
Who to call
- A BPCA or NPTA member pest controller for a residual insecticide treatment of carpet edges and harbourage.
- A specialist textile or heritage conservator for valuable rugs, taxidermy or museum-type items.
Indicative cost: DIY cleaning is low cost; professional treatment typically from around 90 to 200 pounds depending on rooms. Prices vary by area, severity and access, so always get a written quote.
Frequently asked questions
How do I tell carpet beetle from clothes moth damage?
Carpet beetle larvae leave irregular holes and bare patches plus shed bristly skins, and the adults are small mottled beetles. Clothes moths leave silken webbing or cases and you may see small buff-coloured moths. Both eat wool, so finding the insect itself is the surest way to tell them apart.
Do carpet beetles bite?
No. Carpet beetles and their larvae do not bite. The larval hairs can cause an itchy rash in sensitive people, sometimes mistaken for bites, but this is skin irritation rather than a bite or burrowing.
Where do carpet beetles come from?
Adults often fly in through open windows from gardens and bird nests, drawn to pollen and then to natural fibres indoors. Larvae can also arrive in second-hand wool items, rugs or old nests in lofts and chimneys.
Will carpet beetles go away on their own?
Not usually. The larvae keep feeding on natural fibres for months. You need to find and remove the source, clean thoroughly and protect remaining woollens, or the damage continues even if you stop seeing adults.
Sources
Editor, HomesAndHedge
Oliver leads HomesAndHedge's editorial coverage of home and garden problems. He researches and writes the plain-English explainers on pests, invasive plants, damp and mould, drainage and wildlife, drawing on guidance from bodies such as the Property Care Association, the RHS and the NHS, and is clear about when a job needs a qualified professional.
Last reviewed: 8 June 2026