The common ladybug is a small, semi-dome shaped insect. They are usually either red or orange with dark spots. Though they are a generally harmless pest, the ladybug can become a problem when it infests warm buildings in the winter months. This causes a nuisance, which can be prevented by sealing cracks, holes, and other points of entry. The best time to take preventative measures is near the end of summer or beginning of fall, particularly on the exterior walls that face south and west. For the best prevention, trust your pest control professional.