The swallow bug is a small, hairy, black beetle that is approximately 1/8th of an inch long. It has a shiny, black body and its antennae are not segmented. They can often be confused with bed bugs, the difference being that swallow bugs have hair longer than the width of their eyes above their faces.
The best way to prevent swallow bugs from infesting your home is to keep your home and property well-maintained. Seal all cracks and openings in your foundation and exterior walls, and make sure there is no wood debris or other potential food sources near your home. If you see an infestation, use a commercial insecticide to eliminate them.