Animals Introduced

Introduced Animals and the Ruin of Ecology in Victoria: Colonisation, Country, and the Displacement of Balance

When Europeans arrived in Victoria in the early nineteenth century, they brought with them not only new technologies, laws, and crops, but also a living cargo of animals — livestock, pets, and hunting species. Sheep, cattle, horses, pigs, foxes, cats, rabbits, goats, deer, and carp soon multiplied beyond control, transforming the continent’s ecosystems.

For Wadawurrung, Wurundjeri, Gunditjmara, Dja Dja Wurrung, Gunaikurnai, and Yorta Yorta peoples, these animals represented more than physical invaders; they were signs of disruption to the law of balance that had governed Country for tens of thousands of years.

The result was ecological collapse: erosion of soils, loss of native grasslands, extinction of species, and destruction of the intricate relationships between plants, animals, and people.
This article explores how introduced animals reshaped Victoria’s environments — and how Indigenous knowledge offers pathways for ecological and cultural restoration.

Before Colonisation: Balance Through Law

Before the 1830s, Victoria’s Country teemed with diverse and stable animal populations.
Kangaroos, wallabies, emus, bandicoots, bettongs, quolls, and eagles coexisted through a finely balanced web maintained by fire, seasonal hunting, and ecological knowledge.

Traditional law ensured no species dominated:

• Fire was used to renew grass and attract game.

• Animals were hunted selectively, with totemic restrictions protecting breeding populations.

• Predators like dingoes played vital roles, keeping herbivores in check.

This system maintained equilibrium between animal and plant life — an ecological harmony that colonisation quickly dismantled.

The Livestock Invasion: Hooves on Fragile Country

Sheep and Cattle

Between 1835 and 1860, millions of sheep and cattle were released across Victoria.
To European settlers, the open grasslands of Wadawurrung and Wurundjeri Country seemed ideal for grazing.
To Indigenous communities, these animals were agents of destruction.

Their hard hooves compacted the delicate volcanic soils, crushed tubers like murnong, and destroyed native grasses.
Creeks and wetlands were trampled, eroding banks and muddying water once clear enough to drink directly.

By the 1850s, explorers noted that vast areas of Kangaroo Grass and Wallaby Grass had vanished, replaced by dust and weeds (Pascoe 2014; Clarke 2009).
As the grasslands disappeared, so too did the animals and people who depended on them.

Horses, Donkeys, and Camels

Used for transport and exploration, horses, donkeys, and later camels escaped or were abandoned, forming wild populations.
In fragile alpine and desert ecosystems, their hooves and grazing habits caused extensive erosion and destroyed delicate moss beds and wetlands.
Today, feral horses (brumbies) in the Victorian High Country remain a contentious issue — emblematic of the ongoing tension between colonial heritage and environmental protection (DEECA 2022).

Predators of the Colonies: Foxes and Cats

Foxes (Vulpes vulpes)

Introduced for sport hunting in the 1850s, the European fox rapidly spread across Victoria by the 1870s.
Clever, adaptable, and nocturnal, foxes decimated ground-nesting birds, reptiles, and small mammals.
Species such as bettongs, bandicoots, and plains mice, once common across Wadawurrung Country, vanished within decades.

Foxes also preyed on lambs, creating cycles of conflict between farmers and wildlife that persist today.
Ecologically, they replaced the dingo — but without the same balance or cultural law governing their behaviour.
As one Elder described: “The dingo hunted with the land. The fox hunts against it.” (Museums Victoria 2023).

Cats (Felis catus)

Cats arrived with the First Fleet and quickly went feral.
In Victoria, they spread from early settlements to forests and deserts, preying on birds, frogs, and small mammals.
Unlike dingoes, cats hunt even when not hungry, killing for play or instinct.

Research shows that feral cats have contributed to the extinction of over 20 native mammal species across Australia (CSIRO 2020).
They are now present in nearly every ecosystem, including remote islands and alpine areas, often undetected.

For Indigenous peoples, cats symbolised an unbalanced predator — one without ceremony or belonging to Country.

The Rabbit Plague: A Legacy of Collapse

Perhaps no animal transformed Victoria as dramatically as the European rabbit (Oryctolagus cuniculus).
Released for sport hunting in the 1850s near Geelong and Ballarat, rabbits multiplied exponentially, reaching plague numbers within decades.

They consumed vegetation faster than it could regrow, stripped hillsides bare, and undermined soil with burrows.
As grass vanished, dust storms swept the plains and rivers filled with sediment.

Traditional food species like murnong, yam daisy, and native peas disappeared, and animals dependent on them — bandicoots, bilbies, and bettongs — followed.
For the Wadawurrung, whose women once cultivated yam fields across the Moorabool and Barwon plains, the rabbit was a direct agent of cultural starvation (Gott 2019).

By the early 1900s, rabbits had become a symbol of environmental crisis across Australia.

Other Invaders: Goats, Pigs, Deer, and Carp

Goats (Capra hircus)

Introduced for meat and milk, goats escaped and established wild herds on rocky hills and coastal cliffs.
Their climbing and grazing destroyed fragile vegetation, including pigface and coastal heath, and caused severe erosion on cliffs and islands.

Feral Pigs (Sus scrofa)

Feral pigs uproot soil while foraging, spreading weeds and diseases.
In wet forests and river systems, they damage plant roots and create breeding sites for mosquitoes and parasites.
Their wallowing destroys wetland ecosystems crucial for eels and freshwater mussels — species vital to Gunditjmara and Yorta Yorta food systems.

Deer (Cervus spp.)

Sambar, fallow, and red deer were introduced in the 1800s for hunting.
They now roam across forests and grasslands, trampling undergrowth, stripping bark, and competing with native herbivores.
Their spread in the Otways, Grampians, and Central Highlands threatens fragile fern gullies and alpine bogs (DEECA 2022).

Carp (Cyprinus carpio)

Introduced into Victorian waterways in the 1850s, carp quickly became the most destructive freshwater pest.
Their feeding behaviour stirs up mud, increasing turbidity and destroying aquatic plants that filter and oxygenate water.
This suffocates native fish such as Murray cod, bream, and eel, and devastates wetlands like Lake Connewarre and the Murray-Darling Basin (MDBA 2021).
For river communities like the Yorta Yorta, carp have desecrated once-sacred water sites and disrupted eel migration — a profound cultural loss.

Cultural and Ecological Impacts

The introduction of foreign animals caused a cascading loss of biodiversity, food sovereignty, and cultural continuity.

• Loss of native food sources: Grazing destroyed edible plants and forced native animals from their habitats.

• Erosion of soil and water quality: Hooved animals compacted soils, while carp and cattle muddied rivers once crystal-clear.

• Extinction of native species: Over 50 Victorian mammals and birds have become locally extinct since European settlement.

• Cultural trauma: With the loss of animals and plants came the loss of stories, ceremonies, and ecological identity tied to those species.

In Wadawurrung and Gunditjmara stories, the absence of kangaroo grass or the silence of once-singing plains is still described as “the Country grieving.”

Resistance and Adaptation

Despite enormous damage, Indigenous communities have continually adapted to shifting ecologies.

• Cultural burning is being reintroduced to restore native habitats and suppress invasive grass fuels.

• Feral animal management programs are now incorporating Traditional Owner leadership, ensuring balance and respect guide culling.

• Native animal reintroductions — such as bettongs, bandicoots, and potoroos — are succeeding in reserves where foxes and cats are controlled.

• Wadawurrung restoration projects around Lake Connewarre and Anglesea Heath integrate traditional food species and wildlife corridors for kangaroos and wallabies.

These efforts represent healing in motion — not just ecological, but cultural.

Scientific Understanding of Impact

Modern ecological science confirms what Traditional Owners have long observed:

• Introduced herbivores compact soil, increase erosion, and deplete native vegetation.

• Predators such as foxes and cats have driven over 30% of small-mammal extinctions.

• Aquatic pests alter river hydrology and nutrient cycles.

• Interactions between weeds and feral animals amplify decline: rabbits spread thistles, carp encourage algal blooms, and deer transport weed seeds through their fur.

In Indigenous frameworks, these processes are described not just as imbalance, but as illness of Country — a sickness requiring treatment through time, care, and ceremony.

Healing Country: Indigenous Leadership in Restoration

Restoring Victoria’s ecosystems now depends on returning control to Traditional Owners.
Healing strategies led by Indigenous communities include:

• Feral species removal combined with replanting of native flora.

• Cultural fire and water management to reset ecosystems.

• Rewilding programs using native predators such as the Eastern Quoll and Dingo in controlled environments to restore trophic balance.

• Community education linking historical truth-telling with environmental restoration.

As Wadawurrung Elder Melinda Kennedy explains:

“Healing Country is not just about removing weeds or foxes. It’s about returning our relationship — the respect that kept this place alive.”

Conclusion

Introduced animals reshaped Victoria’s landscapes, tearing at the roots of ecological and cultural balance. Their spread represents a living legacy of colonisation — one written in hoofprints, burrows, and eroded riverbanks.

Yet the story is not only one of loss. Across Victoria, Traditional Owners and scientists are restoring Country through truth-telling, ecological knowledge, and renewal of cultural practice.

Each rabbit controlled, each river cleared of carp, each kangaroo grass seed sown — these acts are part of a wider healing. They remind us that the path to restoration begins with listening to the land, learning its wounds, and restoring the law of balance that once governed every breath of Country.

References

Atkinson, J 2002, Trauma Trails: Recreating Song Lines, Spinifex Press, Melbourne.
Clarke, PA 2009, Australian Aboriginal Ethnobotany: An Overview, CSIRO Publishing, Melbourne.
CSIRO 2020, Invasive Animals in Australia: Ecological Impacts and Management Strategies, CSIRO Publishing, Canberra.
DEECA Victoria 2022, Feral Animal Management and Cultural Landscape Restoration in Victoria, Department of Energy, Environment & Climate Action, Melbourne.
Gott, B 2019, The Yam Daisy: A History of Aboriginal Plant Use in Victoria, Aboriginal Studies Press, Canberra.
Museums Victoria 2023, Environmental Change and Aboriginal Knowledge Collections, Museums Victoria, Melbourne.
MDBA (Murray–Darling Basin Authority) 2021, Carp Impacts on the Murray–Darling Basin Ecosystem, MDBA, Canberra.
Pascoe, B 2014, Dark Emu: Aboriginal Australia and the Birth of Agriculture, Magabala Books, Broome.
Royal Botanic Gardens Victoria (RBGV) 2023, Fauna and Ecosystem Recovery Programs in Victoria, RBGV, Melbourne.

Written, Researched, and Directed by James Vegter (26 October 2025)
MLA — Magic Lands Alliance
Sharing the truth of Indigenous and colonial history through film, education, land, and community.
www.magiclandsalliance.org

Copyright MLA – 2025

Magic Lands Alliance acknowledges the Traditional Owners, Custodians, and First Nations communities across Australia and internationally. We honour their enduring connection to the sky, land, waters, language, and culture. We pay respect to Elders past, present, and emerging, and to all First Peoples’ communities and language groups. This article draws only on publicly available information; many cultural practices remain the intellectual property of their respective communities.