German Cockroach Nymph

Scientific Name: Blattella germanica (nymph)

Order & Family: Blattodea, Ectobiidae

Size: 3-12 mm (nymphs vary in size depending on instar, adults are typically 11-15 mm)

German Cockroach Nymph

Natural Habitat

Known for inhabiting human dwellings, especially kitchens and bathrooms, preferring warm, moist, and dark environments. They are often found in cracks, crevices, behind appliances, and inside cabinets.

Diet & Feeding

Omnivorous scavengers. They eat almost anything, including food scraps, grease, pet food, paper products, soap, and even glue.

Behavior Patterns

Nocturnal; they hide during the day and forage for food and water at night. Nymphs undergo several instars (molts) before reaching adulthood. They are fast runners and reproduce quickly, leading to rapid infestations. They produce an aggregation pheromone to attract other cockroaches to harborage areas.

Risks & Benefits

Risks: German cockroaches are significant pests. They can spread pathogens (bacteria, viruses, fungi, parasitic worms) through contact with food and surfaces, contaminating food as they crawl over it. Their droppings and shed skins can trigger allergies and asthma attacks, especially in children. They are not known to provide any benefits to humans or the ecosystem in an indoor pest context.

Identified on: 9/13/2025