These are omnivorous insects which occasionally gnaw textiles. They will, for example, attack artificial, cellulose-based silk, such as the red ribbon used in Christmas decorations and in gift wrappings.
Other insects which occasionally attack textiles include cockroaches and meal- worms, which sometimes feed on soiled linen.
On account of their size, mice and rats often cause serious damage to textiles when they are collecting nest material. In empty holiday houses which mice may enter during the winter it is a good idea to move mattresses and bedding to a place where the mice cannot get at them. For precautions against mice, see also p. 87.