C03 · Cockroach
American Cockroach
Periplaneta americana
The largest common cockroach in Australia. Lives in sewers and drains, spreading bacteria when it enters homes.
- Size
- 35–40 mm
- Habitat
- Sewers, drains, basements, wall voids
- Activity
- Year-round, nocturnal
Safety Warning
American cockroaches spread bacteria from sewers to food surfaces. Clean all food-contact surfaces before use if cockroaches are present.
Overview
Despite its name, the American Cockroach is found worldwide and is the largest pest cockroach in Australian homes. It thrives in warm, moist environments — sewers, drains, grease traps and commercial kitchens are prime habitat. They can fly short distances and are excellent climbers. Because they move between waste and food surfaces, they are a significant vector for Salmonella and other bacteria.
How to identify
- Very large, 35–40 mm, reddish-brown
- Pale yellow figure-8 pattern on the dark pronotum
- Fully developed wings; males fly better than females
- Found in drains, sewers, basements and commercial kitchens
General guidance only. Information on Home Pest Defence is provided for educational purposes and is not a substitute for professional advice. For termites, venomous spider bites, wasp nests in walls, or protected wildlife, contact a licensed pest controller, your GP, or the relevant state wildlife authority. In emergencies call 000; for poisoning call 13 11 26.