Tiny mottled beetles on the window sill and hairy little “woolly bear” grubs in the carpet edges are carpet beetles - one of the UK’s most common and most misdiagnosed textile pests. Their bristly larvae are also a classic cause of “bed bug bites” that are not bed bugs at all. JG Pest Control treats carpet beetle infestations properly. We are open every day except Christmas Day, early until late.

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What do carpet beetles and woolly bears look like?

  • Adult beetles

    2-4mm, rounded like a small ladybird, mottled with black, white and gold scales (the varied carpet beetle) or plain brown-black (the fur beetle). They fly well and appear on window sills in spring and summer, trying to get outside to feed on pollen.

  • Larvae (“woolly bears”)

    up to about 5mm, brown, plump and covered in stiff bristles with characteristic tufts at the tail. These are the ones eating your carpets, and the name woolly bear is what most people know them by.

  • Shed skins

    bristly, hollow casings in carpet edges, drawers and under furniture - often more visible than the larvae themselves.

Signs of a carpet beetle problem

  • Holes and threadbare patches in wool carpets, rugs and natural-fibre clothing - typically scattered holes rather than the larger grazed areas moths cause.
  • Woolly bears or shed skins along skirting boards, in airing cupboards, drawers and under beds.
  • Adult beetles at windows in spring.
  • Itchy, bite-like skin reactions: woolly bear bristles irritate some people’s skin, and the rash is regularly mistaken for bed bug bites.

Carpet beetle or bed bug?

This mix-up matters because the treatments are completely different. Bed bugs leave blood spotting and live in the bed frame and mattress seams; carpet beetles leave bristly skins and damaged fabric, and the “bites” are an irritation reaction rather than feeding marks. If you are waking up itchy, check the mattress seams for bed bug signs and the carpet edges for woolly bear skins - or have us identify it. If it is bed bugs, our bed bug treatment team handles it, including heat treatment.

Professional carpet beetle treatment

Carpet beetles usually arrive from a source: an old bird nest in the eaves or loft, a dead rodent in a void, forgotten woollens, or accumulated pet hair under furniture. Our technicians find and remove the source, then treat affected rooms with professional residual insecticide into the pile, edges and harbourages that shop sprays miss. Severe infestations across multiple rooms can be resolved in a single visit with heat treatment, which kills eggs, larvae and adults together. Every visit is by an RSPH (BPCA) Level 2 certified or trainee technician and the work is guaranteed.

Frequently asked questions

Woolly bears - carpet beetle larvae. They eat wool, silk, feathers and animal hair, and they are the damaging stage of the insect. Bristly shed skins in carpet edges are the giveaway.

Not in the blood-feeding sense, but woolly bear bristles cause an itchy reaction on some people that looks remarkably like insect bites - one of the most common bed bug false alarms we see.

Often a bird nest in the roofline, a dead mouse in a void, or stored natural textiles. Adults also fly in through windows in spring. Finding the source is half the treatment.

Because the source is still there - a nest or hair build-up keeps reseeding the rooms. Professional treatment includes tracking that down rather than just spraying the visible larvae.

Yes. We treat affected rooms and storage, and advise on laundering, freezing or heat for infested garments so nothing reinfests the property afterwards.