All ages are found in a reproducing population. Immature bed bugs may live for several months without feeding while adults may survive as long as one year without a meal. Under normal circumstances, adult bed bugs will live for about ten to eleven months.ed bug before and after a blood meal. Adult bed bugs are oval, flattened, brown, and wingless insects approximately 1/4 to 3/8 long (5-9 mm). They are similar in appearance to a wood tick. After the bug has taken a blood meal, its color will change from brown to purplish-red.