The German cockroach is the most common species of the cockroach. German cockroaches can breed at a rate of up to six generations per year.
American cockroach adults grow to an average length of around 4 cm and about 7 mm tall. They are reddish brown and have a yellowish margin on the body region behind the head. Immature cockroaches resemble adults except they are wingless.
Brown-banded cockroaches get their name from the two lighter bands they have across their dark brownish bodies. The brown-banded cockroach can live for about 206 days.