Australia seizes over 100,000 illegal cockroaches in largest-ever exotic invertebrate bust

The discovery

More than 100,000 live cockroaches were seized in May from a commercial breeder in Bathurst, New South Wales, about 200 kilometers west of Sydney. The insects included Madagascar hissing cockroaches, one of the world's largest species at 5 to 7.5 centimeters, and dubia cockroaches, often raised as reptile feed. The Department of Climate Change, Energy, Environment and Water confirmed it was the biggest confiscation of illegal exotic invertebrates in Australian history.

Biosecurity and legal risks

Both species are prohibited from import, breeding, or sale under strict biosecurity controls. Australia, as an isolated continent, enforces rigorous border rules to protect its native wildlife and agricultural sectors from invasive pests and diseases. The department noted that the exotic cockroaches have never undergone an environmental risk assessment and could spread diseases or threaten local ecosystems if released.

We take our job protecting Australia's unique biodiversity and breaches of national environment law very seriously.

Market and motives

The seized insects had an estimated black-market value of AUD 200,000 (USD 142,000, EUR 120,000–122,000). Snake catcher Stefanie Lesser told the ABC that large exotic cockroaches were likely being sold online as a cost-effective food for pet lizards, because fewer insects are needed due to their size.

Because they are big, people keep them; they are almost the size of your palm.

Official response and consequences

Authorities warned that those caught possessing or trading illegal cockroaches could face fines or prosecution under federal law. Pet owners were urged to switch to legal alternatives such as crickets or native wood roaches. The confiscated insects will be euthanized, the department said, while investigations into the illegal breeding and trade continue.