C02 · Cockroach
Australian Cockroach
Periplaneta australasiae
Large outdoor cockroach that flies well and moves indoors during humid weather. Common in Queensland and northern NSW.
- Size
- 23–35 mm
- Habitat
- Gardens, greenhouses, sub-floors
- Activity
- Year-round, peak in summer
Overview
The Australian Cockroach looks similar to the American but is slightly smaller and has a bright yellow margin on the pronotum. Despite its name, it originated in Africa and is now widespread across tropical and subtropical Australia. It prefers greenhouses, gardens and mulch, but enters homes through gaps and drains during wet or hot weather. It's a strong flier and an active climber.
How to identify
- Large, 23–35 mm, dark reddish-brown
- Distinct yellow margin on the pronotum (shield behind head)
- Fully developed wings, both sexes fly well
- Often found in gardens, mulch, under bark and in compost
Pro Tip
Australian cockroaches are strong fliers. If you see one on the ceiling at night, check your outdoor lighting — they follow light through open windows.
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.