Ladybugs are a type of beetle that are often associated with good luck and fortune. While they are generally harmless and even beneficial, they can sometimes become a nuisance if they infest homes or buildings. Ladybugs may enter homes in search of shelter during the fall and winter months, and can be difficult to remove once they have established a presence. Ladybug infestations can be unsightly and unpleasant, and may also produce a foul odor.