Bed bugs feed on human blood and other warm-blooded hosts. They are oval in shape and grow up to 4-5mm long when fully grown. Their skin color is rust brown to a deeper red brown. Tell tale signs of a bed bug infestation are: bite symptoms, small brown (fecal) spots on bedding and small blood smears on sheets. Females can deposit one to five eggs a day, and may lay 200 to 500 eggs in a lifetime. Under normal room temperatures and with an adequate food supply, they can live over 300 days.