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American Cockroach

American Cockroach Adults, Nymphs, and Egg Case (Ootheca)

American Cockroach – Periplaneta americana (Linnaeus).  One of the largest roaches, American roaches can be as much as one and one-quarter inches long.  They are reddish brown with a light colored edge around the pronotum just behind the head.  Typically occurring outdoors around structures in mulch, they will readily enter the structure and can even establish populations inside consisting of very large numbers.  American cockroaches feed on a wide variety of foods but decaying organic matter seems to be preferred.  They will also feed on some items that are not considered food items such as book bindings, manuscripts, clothing, and other items that contain starch.  Both nymphs and adults feed on the same type items which is why they can build up great numbers in the same areas.