
Common in Australian gardens
Ladybugs (Ladybirds)
Very common throughout Australia. We have dozens of native species plus some introduced species.
* Excellent aphid predators.
* Both adults and larvae are beneficial.
* The larvae often get mistaken for pests because they look like tiny alligators.
Hoverflies
Also widespread in Australia.
* Adults are important pollinators.
* Larvae of many species eat aphids.
* Often mistaken for bees or wasps because of their yellow-and-black colouring.
Green Lacewings
Very common and one of the best garden allies.
* Larvae (“aphid lions”) devour aphids, mealybugs, scale and small caterpillars.
* Adults are delicate green insects with transparent wings, exactly as shown.
Ground Beetles
Many native species occur in Australia.
* Usually nocturnal.
* Hunt slugs, caterpillars, cutworms and other garden pests.
* Often found under mulch, logs and rocks.
Also found in Australia, but less familiar
Earwigs
This is where Australians often get surprised.
Many earwigs are actually beneficial predators and scavengers. They will eat aphids, insect eggs and decaying matter.
However, some species can also nibble seedlings, flowers and fruit, so they’re not quite the “good guys” that ladybirds and lacewings are.
Rove Beetles
Present throughout Australia.
* Fast-moving black beetles.
* Excellent predators.
* Many gardeners mistake them for pests because they raise their abdomen like a scorpion when disturbed.
Fiery Searcher Beetle
This one is the exception.
The insect shown is a North American species called the “Fiery Searcher” (a large caterpillar-hunting ground beetle). We don’t have that exact species in Australia, but we do have numerous native ground beetles that fill essentially the same ecological role.
The most commonly killed beneficial insects in Australian gardens are:
1. Ladybird larvae
2. Lacewing larvae
3. Hoverfly larvae
4. Rove beetles
People see something “creepy-crawly” on a plant and squash it without realising it’s eating hundreds of aphids for free.
As a rule of thumb I use:
If an insect is actively wandering through an aphid colony, there’s a good chance it’s a predator rather than a pest.
One small caveat: some versions of these internet charts oversimplify things. Earwigs can be both helpful and harmful depending on species and circumstances, and not every hoverfly larva is an aphid predator. But overall the poster’s message—”identify before you squash”—is excellent advice for Australian gardens.