They do not damage household structures or furniture and are harmless to people and pets. They are actually beneficial because they feed on insect larvae. However, large numbers are occasionally present and they become more annoying than beneficial. There are hundreds of species of ground beetles commonly found in Iowa.
Ground beetles live on the ground under leaves, logs, stones and other debris.
They feed mostly at night, and may be attracted to lights. They usually gain entrance to the house by crawling in through small cracks or openings, or through open doorways and windows. Controlling ground beetles is usually not necessary. However, if invasion is persistent or especially troublesome you can eliminate or treat their outdoor hiding places as practical. Spot treatment of likely sources with the insecticide sprays mentioned below is possible.