When Australians think about threatened species, iconic animals such as koalas, parrots and frogs often come to mind. Public discussions about biodiversity loss often focus on a small number of well-known species, creating the impression that Australia’s conservation challenges are mainly an animal issue. However, government biodiversity data reveal a much broader and more complex picture.
Australia has thousands of unique plant and animal species found nowhere else in the world. Despite this richness, habitat loss, land clearing, invasive species, disease and climate-related pressures have contributed to increasing numbers of species being listed as threatened. Understanding where these species are found, which groups are most affected and how conservation monitoring is distributed is important for protecting Australia’s ecological future.
Using data from the Australian Government’s threatened species register and the Threatened Species Index, this article explores five key patterns within Australia’s threatened species crisis. Together, these visualisations show that threatened species are concentrated in particular regions, plants make up the majority of listed species, and conservation monitoring is not evenly distributed across all biological groups.
Australia currently has more than 2,000 species listed under national threatened species legislation. The largest categories are vulnerable and endangered species, while hundreds of species have already reached critically endangered status. These categories represent increasing levels of extinction risk and provide an indication of the scale of biodiversity pressures facing Australian ecosystems.
One of the most important findings from this chart is that endangered and vulnerable species make up a large share of the threatened species list. This shows that many species are not only at early stages of concern, but are already facing serious risks to their long-term survival. The number of critically endangered species is especially concerning because these species are often at high risk of extinction without major conservation intervention.
While extinct species receive considerable public attention, the greatest conservation challenge is preventing vulnerable and endangered species from moving closer to extinction. Conservation action is usually more effective when it happens before a species becomes critically endangered. This chart therefore highlights the importance of early action, long-term protection and regular monitoring.
Public discussion about threatened species often focuses on animals. Images of koalas, parrots and frogs frequently appear in media coverage and conservation campaigns. However, the data tell a different story. More than 1,500 threatened species belong to the plant kingdom, compared with fewer than 700 animal species.”, while animals account for a smaller share.
This finding challenges the common idea that biodiversity loss is mainly about wildlife. Plants form the foundation of ecosystems by providing habitat, food and ecological stability for many animal species. When plant diversity declines, the impacts can spread across entire ecosystems because many other species depend on those plants for survival.
The dominance of plants among threatened species also highlights a gap in public awareness. Animal conservation often receives more attention, but plant conservation is just as important for ecosystem health. Protecting Australia’s biodiversity therefore requires a broader view that recognises the importance of native plants, not only iconic animals.
Australia’s threatened species are not distributed evenly across the country. New South Wales contains more than 750 threatened species, making it Australia’s most concentrated hotspot of threatened biodiversity., followed by Western Australia and Queensland. Together, these three states account for a substantial proportion of Australia’s listed threatened biodiversity.
The chart also shows that threatened plant species outnumber threatened animal species in every major state. This pattern is especially clear in New South Wales and Western Australia, where plants make up a large share of the threatened species count. This reinforces the earlier finding that Australia’s biodiversity crisis is strongly linked to the decline of native plant communities.
Several factors may contribute to the concentration of threatened species in these states. New South Wales and Queensland have experienced extensive land clearing and urban expansion, while Western Australia contains many unique ecosystems with high levels of endemism. These regions support diverse habitats, but they are also exposed to major environmental pressures. The concentration of threatened species in a small number of states suggests that targeted regional conservation programs could create important national biodiversity benefits.
Understanding where conservation monitoring occurs is just as important as understanding where threatened species are found. Monitoring programs provide the information needed to assess population trends, evaluate conservation actions and identify emerging threats before they become harder to manage.
The interactive map shows that monitoring activity is concentrated in particular regions rather than evenly distributed across Australia. Some areas contain large clusters of monitoring records, while other parts of the country show much less recorded monitoring activity. This uneven pattern may reflect differences in accessibility, research funding, population density, data availability and long-running monitoring programs.
The map also highlights the value of spatial data in conservation decision-making. By identifying regions with strong monitoring coverage, researchers can understand where evidence is strongest. At the same time, areas with limited monitoring may represent knowledge gaps. Effective conservation depends not only on protecting species, but also on having enough information to know whether populations are improving or declining over time.
Monitoring is one of the most important tools available to conservation scientists. Without long-term monitoring data, it is difficult to determine whether threatened species are recovering, declining or remaining stable. Monitoring programs provide the evidence needed to guide conservation policy and evaluate whether management strategies are working.
The Threatened Species Index data show that birds receive substantially more monitoring attention than any other major taxonomic group. Bird monitoring records consistently exceed those of mammals, reptiles, amphibians and plants across the period shown. This pattern likely reflects the long history of bird surveys in Australia, as well as the success of citizen science programs that allow volunteers to contribute large numbers of observations.
However, the chart also reveals an important imbalance. Earlier results showed that plants account for the majority of Australia’s threatened species, yet plants receive considerably less monitoring attention than birds. This mismatch suggests that some of the groups facing the greatest conservation challenges may not receive proportional monitoring effort. If monitoring remains concentrated on a small number of well-studied groups, population declines among less-monitored species may be detected too late for effective intervention.
Australia’s threatened species crisis extends far beyond a few iconic animals. The data reveal that plants account for most listed threatened species, threatened species are concentrated in particular states, and conservation monitoring is distributed unevenly across biological groups and regions.
Several important patterns emerge from the analysis. First, plant species represent the largest component of Australia’s threatened biodiversity, highlighting an often-overlooked aspect of conservation. Second, biodiversity pressures are concentrated in particular regions, especially New South Wales, Western Australia and Queensland. Finally, while birds receive extensive monitoring attention, other groups that face major conservation risks may be comparatively understudied.
Together, these findings suggest that Australia’s conservation challenges are both geographically concentrated and unevenly understood. Protecting biodiversity will require not only continued monitoring and research, but also greater attention to plant conservation and targeted regional strategies. As environmental pressures continue to grow, evidence-based conservation decisions will play an increasingly important role in safeguarding Australia’s unique ecosystems for future generations.
Australian Government Department of Climate Change, Energy, the Environment and Water. (2025). Threatened species and ecological communities of national environmental significance. https://www.dcceew.gov.au
Threatened Species Index Australia. (2025). Threatened Species Index Australia data. https://tsx.org.au
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