Silverfish can be found almost anywhere in the house, but usually are found near their food source. They feed on carbohydrate and protein based products such as rolled oats, flour, starch, paper, cotton, some synthetic fabrics, glue, and paste. They are normally found in areas that are warm and moist, such as a bathroom, kitchen, or in the basement near the furnace. Silverfish, which are about 1/2" long, can live for long periods of time without food. They are more a nuisance pest than a real problem, but they can contaminate human food with their droppings and scales. They can also damage books if they should start feeding on the glue in the bindings.