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Protecting what we love

Department of Agriculture, Fisheries and Forestry
12 December 2024

How environmental biosecurity is everyone’s business.

A forest and water

Australia’s natural environment is unlike any other

Ancient mountain ranges. Sweeping outback plains. Mighty rivers. Pristine coastlines. Australia is known the world over for our wide-open spaces, national parks, beautiful beaches, incredible wildlife and fresh air. These things make us unique.

Our rich and delicate biodiversity is made up of more than 600,000 organisms, and many are not found anywhere else on earth. These irreplaceable environmental assets underpin our $90 billion agriculture, fisheries and forestry industries, and the international trade that comes from them. 

They also provide our food, enhance our health, and allow our economy to prosper.

In fact, you could say that our way of life depends on our incredible land, sea and aquatic environments.

But these spectacular spaces and even our own backyards are at risk from invasive species.

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Imagine an Australia without gum trees…

The Myrtaceae is the largest plant family in Australia. They are a defining feature of Australia’s forests, bushlands, parks and backyards.

All our most-recognisable eucalypts are in the Myrtaceae family. As well as tea trees, lilly pillies, bottle brushes, and many more iconic species.

By attacking these trees, one exotic disease could change the Australian landscape forever.

Deck patio amongst native Australian landscaping and gum trees
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Myrtle rust on a lilly pilly

Myrtle rust

Myrtle rust is an exotic disease that threatens trees and shrubs in the Myrtaceae family of plants. It’s a disease caused by the exotic fungus Austropuccinia psidii that causes lost and deformed leaves, stunted growth and death.

At least 15 rainforest tree species are at risk of extinction in the wild due to myrtle rust infection.

Damaged gum tree

One strain of myrtle rust was detected in Australia in 2010. It has since spread across the eastern states, Tasmania, parts of Western Australia and the Tiwi Islands. Biosecurity measures are in place to stop the spread.

Tree species are dying. Once the tree canopy dies, whole ecosystems can become vulnerable.

Other strains are present overseas. These ‘exotic strains’ of myrtle rust could further devastate our native forests if they were to enter Australia.

Environmental biosecurity strives to keep them out.

Our native flora and fauna are iconic

We are home to so many incredible creatures found nowhere else on earth. Our unique flora and fauna evolved in isolation, surviving and flourishing because of the delicate, intricate relationships in our natural ecosystems.

Image & caption
Kookaburra in a tree
A quokka looking very cute

These plants and animals are synonymous with Australia. We use many of them on emblems and name sporting teams after them because they represent our culture and heritage. People come from all over the planet to marvel at them. In the year ending June 2024, our $60 billion tourism sector showcased these amazing plants and animals to over 7.4 million international visitors.

But many of these species are under threat. Since European settlement around 100 native species have become extinct, largely due to the impact of invasive species. Invasive species out-compete and prey on native ones. They also destroy habitats, changing the balance of biodiversity and the landscapes we love.

Protecting the great Aussie outdoors

By protecting our iconic plants and animals, environmental biosecurity also protects the outdoorsy way of life we love.

Some exotic pests, if they became widespread, could stop us from enjoying the simple pleasures we take for granted, like going barefoot in the backyard, or having a BBQ picnic in the park, or kicking the footy around on the local oval.

Family picnicking

Fire ants

Red imported fire ants (Solenopsis Invicta) are some of the world’s most serious invasive species.

They are a menace to agriculture and make public spaces unusable. They can attack and kill small birds and reptiles.

Bites from these ants are extremely painful, especially because ants tend to swarm and all sting at once. People have died from anaphylaxis after being stung.

Invasive ant
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Our climate is perfect for red imported fire ants. In fact, more than 95% of Australia offers perfect conditions for these pests, as well as no natural predators.

So, if we did nothing to stop them, they would easily find a home in all but our coldest regions.

Map of Australia

In the last 25 years, there have been 8 incursions of this pest at several locations in Queensland, as well as New South Wales and Western Australia.

Working together, Australian governments at all levels have prevented these ants from establishing in most places.

Map of Queensland

In one corner of Southeast Queensland, we are still working to eradicate this invasive ant.

Invasive species are non-native animals, plants and diseases that, if they were to establish here, would cause significant damage to our native animals, plants and eco-systems.

Dr Bertie Hennecke, Australian Chief Environmental Biosecurity Officer

How invasive species enter Australia

Australia is an island continent, surrounded by a vast ocean, so it’s difficult for invasive species to reach our shores of their own accord.

Some of the invasive species that do the most damage are animals that were brought here deliberately many years ago, before the term environmental biosecurity even existed. For instance, feral deer, foxes, rabbits and European carp were introduced by humans. Now, these have become established environmental pests.

These days, there are so many ways these pests can enter.

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Invasive pest pathway into Australia

Some pests spread naturally through events like cyclones.

Invasive pest pathway into Australia

Some diseases are carried in by migrating wild birds. Insects can be blown in.

Invasive pest pathway into Australia

Passengers sometimes accidentally carry exotic pests into Australia in souvenirs, in the dirt on their shoes, or outdoor equipment. Unfortunately, some people engage in the illegal wildlife trade.

Invasive pest pathway into Australia

Others ‘hitchhike’ here in sea containers on cargo ships or in packing materials for other goods.

When a pest enters Australia it poses a risk to our environment, economy and way of life.

Pressure on the border is increasing

On average, each year Australia receives:

2.5

million shipping containers

90,000

international aircraft

22

million passengers

19,000

commercial vessels

144

million incoming mail items

These numbers are predicted to steadily rise.

In addition, global pressures such as climate change, pollution and land degradation are increasing the movement of invasive species around the world, altering their predicted pathways. Australia can expect to face a new array of invasive species as these impacts continue.

Image & caption
Biosecurity officer
Biosecurity dog

Keeping exotic pests out

We work hard to keep exotic invasive species out of Australia. This protects our unique eco-systems, amazing plants and animals and our way of life. It also allows agricultural industries to be thriving and productive.

Our biosecurity system is a continuum. This means we work to keep pests out before they get to our shores, at the border and within Australia.

How we keep pests out

  • We work with neighbouring countries to enhance their biosecurity practices.
  • We prepare for the potential incursions of invasive species not yet in Australia, so we are ready to respond as needed.
  • We have strong biosecurity measures at the border, including inspections and stiff penalties for doing the wrong thing.
  • We engage in surveillance so we can detect pests as soon as they arrive.
  • We partner with First Nations people, whose connection to Country and stewardship of natural resources has helped to protect Australia for thousands of years.
  • We collaborate with biosecurity leaders in government, industry and the community.
  • We make sure that our policy decisions are underpinned by the best available science.
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But environmental biosecurity is everyone’s business

Everyone, at every level, plays a role. 

For example, states and territories take the lead during a biosecurity outbreak within their borders. They are also responsible for enforcing domestic regulations. 

Industry groups and environmental organisations help with coordination, capacity building and foster biosecurity awareness.

Research organisations equip us with the best available science. Citizen scientists collect data, helping us detect pests within our borders.

You can help too

When you are hiking, diving, camping, gardening or doing anything outdoors, look out for invasive species. If you spot something unusual report it.

Always follow biosecurity guidelines when travelling or shopping online.

Together, let’s make sure Australia’s unique environment--the plants, animals and eco-systems that we love--is available for future generations, too.

See how to protect Australia from invasive pests

See more on environmental biosecurity

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Young boy in gum tree

Credits

  • April Noble, Antweb.org, Bugwood.org
  • Arthur Mostead
  • Department of Agriculture, Fisheries and Forestry
  • Geoff Pegg, Department of Agriculture and Fisheries, Queensland
  • Lauren Hemara
  • Michael Masters
  • National Fire Ant Eradication Program
  • Digital story
  • Biosecurity
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Page last updated: 11 March 2025

We acknowledge the continuous connection of First Nations Traditional Owners and Custodians to the lands, seas and waters of Australia. We recognise their care for and cultivation of Country. We pay respect to Elders past and present, and recognise their knowledge and contribution to the productivity, innovation and sustainability of Australia’s agriculture, fisheries and forestry industries.

Artwork: Protecting our Country, Growing our Future
© Amy Allerton, contemporary Aboriginal Artist of the Gumbaynggirr, Bundjalung and Gamilaroi nations.

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