Environment & Ecology
The species we’re losing before we even know them
Every year, Australians hear the same reassuring headline: the environment is recovering. Rainfall is up. Green cover is improving. Scores are above average. But beneath this good news story, a quieter emergency is unfolding — one that receives almost no public attention. Australia is losing species at a rate that has no parallel in recorded history, and the numbers tell a story far darker than the annual scorecard suggests.
Australia’s annual environment score (0-10) has recovered strongly since the Black Summer of 2019-20. But this headline number measures weather-driven conditions — rainfall, vegetation cover, river flows. It says nothing about whether our species are surviving.
Source: Australia’s Environment Report 2025 (ANU / TERN). ausenv.tern.org.au. Hover over bars for details.
While weather conditions have recovered, wildlife has not. The Threatened Species Index tracks the abundance of hundreds of monitored species since 1985. Every group is in decline. Frogs have lost 97% of their abundance. Reptiles, 94%. Even birds and plants have fallen by nearly half.
Source: Threatened Species Index 2025 (TERN / University of Queensland). tsx.org.au. Baseline year 1985 = 100%. Hover over lines; click legend to isolate groups.
The threatened species list has grown by 54% since 2000 — from 1,412 to 2,175 species. The most alarming trend is in the Critically Endangered category, which nearly doubled between 2019 and 2022 as the Black Summer fires pushed hundreds of species to the brink. Vulnerable species have barely grown — meaning species are not being added at the bottom of the list, they are jumping straight to the top.
Source: Australia’s Environment Report 2025 (ANU / TERN); DCCEEW EPBC Act threatened species lists. Derived from ausenv.tern.org.au. Hover over areas for counts by category and year.
No single threat is responsible. For mammals, invasive species and disease dominate. For reptiles, climate change is the primary driver. Habitat loss cuts across every group. Bubble size reflects the total number of listed species in each group.
Source: Kearney et al. (2021). A national-scale dataset for threats impacting Australia’s imperiled flora and fauna. Ecology and Evolution, 11(17), 11749-11761. https://doi.org/10.1002/ece3.7920. Click legend to isolate groups; hover for counts.
The extinction crisis is not evenly distributed. New South Wales leads with 721 threatened species, followed by Western Australia (579) and Queensland (575). NSW also has the highest number of critically endangered species (152). Toggle between views to explore the data.
Source: DCCEEW Threatened Species State Lists, 06 February 2026 (data.gov.au). Toggle stacked/side-by-side; hover for counts.
The bottom line: Australia’s environment scorecard looks encouraging. But the scorecard doesn’t measure whether species are surviving. The Threatened Species Index tells a different story: all five major groups are in decline, some catastrophically so. The list of threatened species has grown by 54% in 25 years, and listings continue to outpace recoveries. At the current rate, Australia is set to be remembered not for the great reef or the vast outback, but for the wave of extinctions that happened quietly, while the headlines said everything was fine.
Claude (Anthropic, 2025) was used to assist with initial R code structure and narrative drafting. All data collection, data verification, final code decisions, design choices, and editorial judgements are the student’s own.
Australia’s Environment Report 2025. (2026). ANU / TERN. https://ausenv.tern.org.au
Department of Climate Change, Energy, the Environment and Water (DCCEEW). (2026). Threatened species and ecological communities of national environmental significance [Dataset]. data.gov.au. https://data.gov.au/data/dataset/threatened-species-state-lists
Kearney, S. G., Wintle, B. A., Fuller, R. A., Possingham, H. P., & Watson, J. E. M. (2021). A national-scale dataset for threats impacting Australia’s imperiled flora and fauna. Ecology and Evolution, 11(17), 11749-11761. https://doi.org/10.1002/ece3.7920
Threatened Species Index (TSX). (2025). Australia’s Threatened Species Index 2025. TERN / University of Queensland. https://tsx.org.au
Ward, M., Tulloch, A. I. T., Radford, J. Q., Williams, B. A., Reside, A. E., & Watson, J. E. M. (2021). Impact of 2019-2020 mega-fires on Australian fauna habitat. Nature Ecology and Evolution, 5, 1321-1333. https://doi.org/10.1038/s41559-021-01476-y