Native to South Africa; now widespread in Australia and the North Island of New Zealand.
In residential settings, two other species are often encountered: Black Ground Beetle ( Carabidae ) blackbeetle
Fast-moving and nocturnal. They are attracted to lights and occasionally wander indoors for shelter during extreme weather. Risk: Non-toxic and do not cause property damage. African black beetle - Cesar Australia Native to South Africa; now widespread in Australia
Shiny black, cylindrical body, roughly 12–15 mm long. Risk: Non-toxic and do not cause property damage
Controlled via insecticide-treated seeds, endophyte-resistant grasses like AR37 , and strategic soil pH management (aiming for pH 6.0). 🏠 Common Household "Black Beetles"
Both adults and larvae (C-shaped white grubs) are destructive. Adults chew stems at ground level, while larvae prune plant roots.
Generally beneficial predators. They eat aphids, slugs, and worms.