Local in barns, warehouses and granaries, also sometimes in and around houses, throughout the British Isles, rarely recorded in the wider countryside. Thoroughly naturalised, through accidental introduction in dried goods, and now a frequent, often abundant, pest of warehouses, first recorded in Britain in 1847. Distributed erratically across Hampshire and on the Isle of Wight, where often found in bird seed and similar products, from pet shops. Wingspan 14-20 mm. Larva feeds on dried goods, cereals, grain, dried fruit, nuts and dead insects, causing sufficient damage to be a serious pest in some areas.