German Cockroaches are small, nocturnal, and light or dark brown in color (or black during the nymphal stage), with two distinct dark parallel bands on the pronotum, 6 legs and two antennae. Nymphs go through approximately 6 stages before full adulthood, over a period of roughly 45-120 days. Nymphs are wingless and do forage for food and water themselves. Fully grown German Cockroaches are about 10-15mm long, or dime to penny sized, sometimes winged but rarely flying. Their total life span can extend up to 200 days in an ideal environment.
Females carry their eggs within an egg case, known as an ootheca, until shortly before birth. Typically females will lay 6-8 egg cases throughout their lifespan, with each egg case containing approximately 30-50 eggs. Reproduction rates are very high with this pest- the average infestation is made up of 80% nymphs and 20% adults.