Carpet Beetles vs Moths: Who Is Damaging Your Clothes?

Carpet beetles and clothes moths both eat wool, silk and other natural fibres, but they leave different evidence. Carpet beetle larvae are hairy “woolly bears” that shed bristly skins and leave clean holes with no silk. Moth larvae are pale caterpillars that leave silk webbing, tubes or small cases on the fabric. Look for the debris, not just the holes.

Reviewed by James Rhoades, Owner, ThermoPest · Last reviewed 16 October 2026

Finding holes in a favourite jumper or a bald patch on a rug is upsetting, and most people assume moths. In UK homes it is just as likely to be carpet beetles. The two pests need slightly different handling, so it’s worth a few minutes with a torch to find out which one you have. This guide compares the larvae, the damage and the adults side by side, using the Natural History Museum’s and BPCA’s identification notes, and explains what to do next.

Are carpet beetles and carpet moths the same thing?

No. They’re not even closely related. Carpet beetles are beetles: small, round adults that fly in from the garden, and hairy larvae that do the eating. “Carpet moths” and “clothes moths” are the same two species of small moth, named after where you happen to find them, and again it’s the larvae that cause the damage.

They get confused because they eat the same things and turn up in the same places. The Natural History Museum (NHM) explains that clothes moth larvae feed on keratin, the protein in wool, fur, feathers and silk, and the British Pest Control Association (BPCA) says carpet beetle larvae feed on feathers, fur, hair and wool. Both prefer dark, undisturbed spots: the back of a wardrobe, under a sofa, the edge of a fitted carpet, the airing cupboard.

One useful difference is scale. The BPCA notes that carpet beetle larvae, known as woolly bears, “have outstripped the clothes moths as the major British textile pest”. So if you’ve never seen a moth but your clothes are still being eaten, a beetle is a strong candidate.

Moth Larvae vs Carpet Beetle Larvae: How to Tell Them Apart

The larvae are the stage you’ll most often find, and they are the easiest way to settle it. Empty the affected drawer or lift the rug edge, shake items over a sheet of white paper and look at what falls out with a torch.

Shed Skins vs Silk Cases

If you remember one thing: shed skins mean beetles, silk means moths. A woolly bear moults many times as it grows, and the BPCA says those cast-off skins may be the first sign of an infestation. They are pale, bristly and keep the shape of the larva, so people often mistake them for live insects. Moth larvae don’t leave skins you’ll notice; they leave silk. The NHM describes common clothes moth larvae spinning tunnels of silk and fibre to hide in by day, and case-bearing clothes moth larvae making a small portable case they drag around and later pupate in.

Carpet Beetle vs Moth Damage: What the Holes Look Like

Damage alone is a weaker clue than debris, because both pests make holes in the same fabrics. But there are patterns worth knowing.

Carpet Beetle Holes in Clothes

• The BPCA describes “fairly well-defined round holes along the seams of fabric where the grubs bite through the thread”.
• The NHM lists small, clean holes without silk webbing as a sign of the varied carpet beetle.
• Holes are often scattered rather than clustered, and you may find more damage in stored blankets, felt and fluff than in clothes you wear.
• In carpets, look at the edges and under furniture; larvae also live in the underlay and the gaps between floorboards.

Clothes Moth Damage

• Irregular holes and grazed, threadbare patches, often several close together under a collar, in a fold or along a hem.
• Silk webbing, tubes or cases on or near the damage, sometimes with droppings the colour of the fabric.
• In rugs and carpets, bare patches where the pile has been eaten down to the backing, with loose fibre and silk at the base. The NHM notes larvae leave trails across woollen garments and strip the hair from fur at the base.

Both pests ignore fully synthetic fabrics. The NHM says varied carpet beetle larvae will not feed on entirely synthetic fabrics, and clothes moths need keratin, so a hole in a polyester fleece usually has another cause. Wool blends are fair game for both.

For a fuller rundown of beetle evidence, see our guide to the signs of carpet beetles and what causes them. For moths, see signs of carpet moths and clothes moths.

What do adult carpet beetles and clothes moths look like?

Adults are the stage you’ll see by chance: a beetle on the windowsill, a moth fluttering out of the wardrobe. Neither adult eats fabric. Beetle adults feed on pollen and nectar outdoors (BPCA), and the NHM says adult clothes moths have atrophied mouthparts and don’t feed at all. Seeing an adult tells you the species is in the house, not where the larvae are.

Adult Carpet Beetles

• Varied carpet beetle: the BPCA describes it as 2–4mm long, “like a small, mottled brown, grey and cream ladybird”. The NHM adds that its wing cases carry patches of white, orange and black.
• Fur beetle (two-spot carpet beetle): black or very dark brown with one white spot on each wing case, 4.5–6mm long (NHM).
• Brown carpet beetle: brown to reddish-yellow wing cases, 2–5mm; first found around London, now becoming more common in England, and depends on central heating (NHM).
• Found on windowsills and around windows, because they fly towards light trying to get back to the garden. The BPCA says adults are often seen in April, May and June looking for places to lay eggs.

Adult Clothes Moths

• Common clothes moth: plain golden wings with a fringe of hairs, wingspan 12–17mm, reddish hairs on the head (NHM). The BPCA puts the adult at 6–7mm long.
• Case-bearing clothes moth: silver grey-brown wings with faint dark spots that often rub off, wingspan 9–16mm (NHM).
• They prefer low light and tend to scuttle or flutter low across fabric rather than fly to the window. A larger moth that comes in at night and heads for the lamp is usually a harmless garden species.

Could it be both?

Yes, and it’s not unusual. Both pests like the same undisturbed, fibre-rich spots, and a home that has one has the conditions for the other. If you find shed skins in the airing cupboard and silk cases in the wardrobe, treat them as two problems. Pheromone traps sold for clothes moths attract male clothes moths only and tell you nothing about beetles, which is one reason a beetle problem can go unnoticed while the traps stay empty.

What to Do Once You Know Which It Is

The first steps are the same for both, because they target the larvae and the places they hide.

1. Empty and inspect. Take everything out of the affected wardrobe, drawer or cupboard and check each natural-fibre item, including things you haven’t worn for months.
2. Vacuum hard. The BPCA advises vacuuming all fluff and debris from airing cupboards, shelves, floorboards, carpets and upholstery, and lifting carpets and underlay to clean underneath. Use the crevice tool along skirting boards and under furniture. Empty the vacuum into a sealed bag and put it straight in the outside bin.
3. Treat the clothes. Wash what can take it on the hottest setting the care label allows, and tumble dry on hot where the label permits. Woollens, cashmere and silk usually can’t take a hot wash, so seal them in a plastic bag and freeze them instead. The advice differs by pest: for clothes moths, the BPCA advises freezing at -18°C for at least two weeks (the NHM says -20°C for a week); for carpet beetles, the NHM says a day or two in a deep freezer at -18°C. If you’re not sure which pest you have, use the longer moth time. Let items come back to room temperature inside the bag before opening it. Only throw away items that can’t be washed, frozen or cleaned.
4. Find the source. For beetles, the BPCA says to check the loft and eaves for old birds’ nests or dead birds and remove them, because that’s where adults often lay eggs. For moths, the source is usually a forgotten rug, blanket or garment where the larvae have had time to build up.
5. Store sealed. Clean clothes before storing them and keep woollens in airtight boxes or sealed garment bags, which the BPCA and NHM both recommend.

Our guide to how to get rid of carpet and clothes moths goes through the moth steps in more detail, including what natural remedies can and can’t do.

When DIY Isn’t Enough

Home measures work well on a small problem you’ve caught early. They struggle once larvae are spread through fitted carpet, underlay, floor voids or several rooms, because you can’t vacuum or freeze what you can’t reach. The BPCA suggests a professional pest controller for carpet beetles because of the damage they can do, and advises getting help from a pest management professional, such as a BPCA member, for major moth infestations.

At ThermoPest, carpet beetle treatment starts with an inspection to confirm the species and find where the larvae are living. Our approach is heat-led, with targeted spray where it’s needed, so heat does most of the work in carpets, furniture and fabrics where sprays don’t reach. If it turns out to be moths, our moth control service works the same way. Some jobs need a follow-up visit, and both treatments are covered by our 12-week guarantee.

FAQs

Do carpet beetles turn into moths?

No. Carpet beetles are beetles at every stage: egg, hairy larva, pupa and small round adult. Clothes moths are moths: egg, smooth caterpillar, cocoon and winged adult. They’re often found together because they eat the same fibres, but one never becomes the other.

Do carpet beetle traps work?

Pheromone traps sold for clothes moths only attract male clothes moths, so they won’t show you beetles. Plain sticky traps near windows can catch adult beetles and show whether they’re around, and the NHM lists sticky traps and lures as monitoring tools. Traps don’t catch larvae, which do the damage, so they’re for monitoring, not control.

Do carpet beetles or carpet moths bite?

Neither bites people. Carpet beetle larvae eat fibres, and adult clothes moths don’t feed at all. If you’re waking up with bites, the cause is something else, such as fleas or bed bugs, and it’s worth checking the bed rather than the wardrobe.

Why are there carpet beetles in my bed?

Larvae eat wool, feathers and hair, so a wool blanket, feather pillow or duvet, or the fluff and shed hair that collects under a bed can attract them. Shed skins on or under the bed are the usual sign. They don’t bite or feed on people, but the bedding should be washed or frozen and the area under the bed vacuumed thoroughly.