how you can help Australia’s 1,000 threatened invertebrates

When we think about animals, we tend to think of furry four-legged mammals. But 95% of all animal species are invertebrates – bees, butterflies, beetles, snails, worms, octopuses, starfish, corals, spiders and many many more. These creatures make us happy, pollinate flowers, keep soils healthy, clean water, build reefs, maintain oceans and bring colour and wonder to our homes, cities, farms and wild places.

Sadly, almost 1,000 Australian invertebrates are threatened with extinction and need protecting. These species are on one or more official lists, including the International Union for the Conservation of Nature’s Red List of Species IUCN Red List, Australia’s national list of threatened fauna, and state and territory lists. Many more unnamed and unassessed species are likely in trouble.

When a mammal or bird goes extinct in Australia, it’s big news. But invertebrates have gone extinct much more frequently – and with much less attention. Since colonisation, an estimated 9,000 invertebrates have gone extinct – and one or two more go extinct every week.

Invertebrates face five big challenges: climate change, habitat destruction, natural resource extraction, pollution and invasive species. For the most part, efforts to conserve them are in their infancy in Australia, likely due to the historic undervaluing of smaller animals and little critters. There are shining exceptions such as the incredible conservation success of the Lord Howe Island stick insect, but such examples are vanishingly rare.

The good news? Because invertebrates live everywhere, the opportunity to help is often literally on our doorsteps. Simple actions can help, such as planting native species, leaving logs in the garden and avoiding insecticides.

Meet some of the threatened one thousand

Threatened invertebrates live in every Australian state and territory and in our major cities. Of the almost 1,000 threatened species, 27% are snails and slugs, 25% are insects, 19% are corals, 17% are crayfish and 5% are spiders. Here are some you may come across.

Bogong moth (Agrotis infusa). These moths once filled the night skies in their billions. Now they’re listed as endangered because the cool alpine caves they rely on to escape summer heat are warming with climate change. These migratory moths fly across southern Australia, navigating to their mountain refuges each summer using the stars and earth’s magnetic field. Help map their migration to protect them.

Atlas moth (Attacus wardi). This giant tropical moth with a 22 cm wingspan is now considered vulnerable due to habitat destruction and introduced weeds. If you live near Darwin, planting the native Atlas Croton tree will help feed its very hungry caterpillars.

Mangrove ant-blue butterfly (Acrodipsas illidgei). These endangered butterflies lay eggs on grey mangrove trees home to acrobat ants (Crematogaster species), which carry the eggs into its nests. When the caterpillars hatch, they eat ant larvae while in turn nourishing the ant colony with sugary secretions. Mangrove destruction, pesticide runoff and threats to their ant partners pose real threats. Protecting mangroves in southeast Queensland and reporting sightings of butterflies and ants on iNaturalist will help.