By far the most common problem with occasional invaders is that they become an annoying nuisance. Some can bite, pinch, secrete foul odors, damage plants, stain indoor furnishings, and damage fabrics. Even after they are dead, the problem may continue.

Whether they’re insects, mites or arthropods, occasional invaders typically live and reproduce outdoors. They invade structures when conditions indoors are better for them than outdoor conditions.

Such common pest include but not limited to Pillbugs, sowbugs, millipedes, centipedes, springtail, earwigs, boxelder bugs, stinkbugs, ground beetles and etc.