They will feed on all foods, grease, paint, wallpaper paste, and even bookbinding. The female will have up to forty babies at one time. Some species will mate only once and they will remain pregnant for the rest of their lives. Adults will live for an average of eight to fifteen months. Cockroaches reproduce on an average of four times per year.
Females have a broader abdomen and are more rounded than the male.
This constant reproduction adds to their ability to become immune to environment changes or pesticides. The basic structure of the cockroach has, however, remained the same since the middle of the Silurian period almost 365 million years ago. This cycle is called simple metamorphosis. It means that the younger nymphs look very similar to the adult and will only differ in size. They see poorly in red light and well in green light.