The Case-bearing Clothes Moth (Tinea pellionella) is widespread throughout the UK and Europe. The adults are typically encountered during summer and early autumn, but Case-bearing Clothes Moths that live in human dwellings may be seen all year-round.
The adults of this small moth have a wingspan of 9–16 mm and their forewings are mottled brown with one large and a few smaller indistinct black spots. The hindwings are plain pale brown-grey. Both the forewings and the hindwings are edged by a hairy fringe. The case-bearing moth larvae eat keratin, primarily in the form of hair and feathers. They can become a pest in the home due to their feeding on carpets, upholstery and woollen fabrics. But they also eat other suitable detritus, including cobwebs, bird nests (particularly of Domestic Pigeons, stored vegetables and wallpaper. The Case-bearing Clothes Moth builds itself a portable case out of food debris such as fibres and hairs, in which they can hide.