Bed bug, approximately 6mm in size, pausing along mattress seam in search of a human host. Bed bugs are drawn to humans by the carbon dioxide they exhale and their body heat. This bug磗 abdomen is flat and filled with air bubbles, signs that it hasn磘 fed in several weeks. Bed bugs are able to survive several months without food. These insects have been notorious pests throughout history and are making a comeback in many cities throughout the world. They can survive for several months without food.