Pest Cockroaches

Australia has ten introduced pest species of cockroaches. In Queensland the three common household pest cockroaches are the American Cockroach, Australian Cockroach and German Cockroach.

All three are found in houses in towns and cities, although American Cockroaches are more common in compost heaps, sewers and industrial areas.

All are active at night; feeding on food scraps, book bindings etc.

They lay seedlike, brown egg capsules in concealed situations, such as crevices and among folds of fabric.

American Cockroach
Periplaneta americana

Large, length about 40 mm, reddish-brown with an indistinct brown pattern on the thorax and no yellow edges on the fore wings. 

American Cockroach (Periplaneta americana)
American Cockroach (Periplaneta americana)


Australian Cockroach
Periplaneta australasiae

Large, length about 40 mm, reddish-brown. The thorax is yellowish with dark brown edges and a central patch, and the forewings have yellowish edges at their bases. Despite its name, this species is introduced, possibly from Asia.

Australian Cockroach (Periplaneta australasiae)
Australian Cockroach (Periplaneta australasiae)


German Cockroach
Blattella germanica

Length 10 mm. Pale with two dark bars running lengthwise along the thorax. This is the common small household pest cockroach in south-east Queensland. 

German Cockroach (Blattella germanica)
German Cockroach (Blattella germanica)


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