Bed bugs are small, oval, reddish-brown insects that live on the blood of animals or humans. Since bed bugs live solely on blood, having them in your home is not a sign of dirtiness. You are as likely to find these pests in immaculate homes as much as in filthy ones. Bed bugs are highly mobile insects and their sticky coatings allow them to be transported to new locations by attaching themselves to clothing or luggage. They also travel on their own moving through wall voids, ducts, and false ceilings. Their small, flat shape allows them to hide and remain undetected in very small spaces.