Relatives of the grasshopper, crickets are best known for the high-pitched chirping sound they often make at night. Although they’re usually found outside, crickets are common basement bugs that find their way indoors in wet weather, burrowing into dark spots, cracks and crevices. These large (3/4 inch), brown or black insects rarely breed indoors or cause major damage, but their jumping can be a nuisance and they can chew on almost anything (including paper, rubber and fabric). To prevent crickets from finding their way inside, caulk any gaps around doors or windows and reduce outdoor lighting (or use yellow lighting) at night to avoid attracting them.