Where Does Cockroaches Breed?

Cockroaches breed by laying eggs. Females lay up to sixteen eggs per egg case in a sheltered spot. The incubation period is about two months. The nymphs of American cockroaches are similar to adult cockroaches but are smaller and do not have wings. They will change between six and fourteen times before reaching adulthood.

Cockroaches breed in warm, moist environments. Their breeding season is in the summer months. Since their eggs need warm, moist environments to survive, they do not reproduce much during the winter months. Female cockroaches reproduce without males but lay more eggs if they live with other females.

Adult cockroaches are about an inch long and have two pairs of wings. The female cockroach lays her eggs in her uterus. After the eggs hatch, they start to search for food. In ideal conditions, a mother roach will tend to care for her offspring. Some mothers will bury their eggs while others will hide them. When the eggs hatch, they are known as nymphs and will begin to turn brown. As they mature, they will molt, each time giving them their adult form.

In California, Blattella germanica is the most common indoor species. They prefer warm, humid, and dark areas. They often find shelter in cardboard boxes, furniture, and cupboards. They may also live in light fixtures and in the ceiling.