The case-bearing clothes moth (Tinea pellionella) is a small indoor pest known for damaging natural fibers. They prefer materials of animal origin but will feed on plant based materials, and can ruin clothes, carpets, and furniture by feeding on materials like wool, silk, and feathers.
These moths don’t bite or cause health issues, but can cause costly damage if not addressed quickly.
Adult — 1/4" long. Dark buff forewings with three faint spots (may appear as two).
Larva — up to 3/8" long. Lives in a silken tube, which is usually the color of the fabric it has been eating.
Pupa — formed in the sealed larval case.
Similar to the common clothes moth.
Regular holes made in fabrics.
More rare than the Common clothes moth. Check imported goods such as hides or objects of animal origin.
These moths tend to avoid light and are rarely seen flying, making infestations harder to notice early on. Unlike some other moths, adult case-bearing moths aren’t often seen flying around lights, making it harder to tell they’re in your home.
Spotting a case-bearing clothes moth infestation can be tricky because these moths prefer darkness and stay out of sight. You might notice small, irregular holes in clothing, rugs, or upholstered furniture. Another sign is the larval case, a small, fuzzy tube that may be attached to fabric or found on shelves or floors.
Adult case-bearing clothes moths are small and hard to spot. They’re usually one-fourth of an inch long with dark buff forewings and with three faint spots (these may appear as two). Their coloring helps them blend in with fabrics and other materials in the home.
The larvae are up to three-eighths of an inch long and live in a silken tube, which is usually the color of the fabric they have been eating. As the larvae feed, they carry this tube with them.
It is the larvae that cause the damage to your clothes and fabric.
Rarer than the common clothes moth, case-bearing clothes moths are often found in closets, drawers, storage boxes, or under heavy furniture — anywhere natural materials are left alone for long periods.
The larvae feed on wool, feathers, fur, hair, and imported goods such as hides or objects of animal origin. They may also feed on lint or fabric scraps that collect in corners or under furniture.
Synthetic fibers aren’t usually a target unless blended with natural materials or soiled with food or sweat.
Similar to the common clothes moth, the case-bearing clothes moth’s lifecycle begins when the adult lays eggs on or near a food source like wool or fur. Once the eggs hatch, the larvae begin feeding and building their protective cases. This larval stage can last several months, depending on temperature and food availability.
When the larva is fully grown, it seals off its case and pupates by forming in the sealed larval case. After pupating for about one to two weeks, an adult moth emerges and begins the cycle again. Adults live only a short time, just long enough to mate and lay eggs.
Over time, a case-bearing clothes moth infestation can lead to widespread damage in closets, storage areas, or under furniture. While these moths don’t pose a health risk, the damage they cause can be costly and frustrating.
Since they often hide in hard-to-reach or overlooked spaces, they can go unnoticed for long periods.
Case-bearing clothes moths can be tricky to eliminate once they’ve settled in. The larvae hide deep in fabric folds, corners, and quiet places, while the adults avoid light and stay out of sight.
Even if you vacuum thoroughly, it’s easy to miss eggs and larvae. That’s why professional pest control is often the most reliable way to find and treat a case-bearing clothes moth infestation.
If you’ve spotted signs of case-bearing clothes moths or are dealing with other moth pest issues in your home or business, our technicians are ready to help. We’ll inspect your space, target the problem areas, and work with you to help reduce the chance of them returning.
Case-bearing clothes moths are small and tan, with dark specks on their wings. The larvae carry a portable silk case that looks like a tiny tube, often covered in fabric fibers.
The main difference is in the larvae. Case-bearing larvae live inside and carry a silk case, while webbing clothes moth larvae, also known as common clothes moth larvae, do not. Adults also look slightly different, with case-bearing moths having darker markings.
No, they don’t bite or carry diseases. The harm comes from the damage their larvae cause to fabrics and stored materials.
Look for small, tube-like cases attached to fabric surfaces, irregular holes in natural materials, and adult moths in dark areas of the home.
Wool, feathers, fur, and silk are most at risk. Items stored in undisturbed, dark places are especially vulnerable.