Bugs like a nice home for the same basic reasons you do. They want food, water, and shelter. If they can find these in your house, they’ll move in. Bugs commonly found inside homes include ants, cockroaches, earwigs, firebrats, flies, house centipedes, silverfish, and spiders. Pet owners sometimes have to deal with fleas and ticks in the house. Each of these pests can show up at different times of the year, and some are more problematic in certain parts of the countries than others.