CSU Extension Three cockroach life forms can be found in an infested area. The female may carry the eggs around until just before they hatch or, in some species, she may hide them in some protected area. As the eggs hatch, young cockroaches, or nymphs, emerge. Similar in shape and color to the adults, they are smaller and wingless. Their habitats and food preferences are the same as those of adults.
Cockroaches are active at night, so daytime observation is a good sign of a heavy infestation.
They prefer protected areas, such as cracks and crevices, to rest and hide. Although cockroaches prefer starchy foods and meats, they will eat anything of plant or animal origin.