Every year, the International Union for Conservation of Nature updates its Red List — the world's most authoritative assessment of which species are threatened with extinction, and which are recovering.
The 2025 update, released in late 2025, contained one of the most encouraging sets of news the list has delivered in years: **20 species were downlisted**, meaning they are no longer classified as threatened with extinction. Twenty species that were once on a path toward disappearing from the Earth have, through decades of human effort, been brought back.
The most celebrated of these is the green sea turtle.
**The Green Sea Turtle: From Endangered to Least Concern**
In the latter half of the 20th century, green sea turtles were in serious trouble. Commercial hunting of nesting females had decimated populations across the Atlantic, Pacific, and Indian Oceans. Pollution, illegal wildlife trade, entanglement in fishing nets, and the loss of nesting beaches to coastal development compounded the pressure. By the 1970s and 80s, population declines of 48 to 67% had been recorded at monitored nesting sites worldwide.
The response was a coordinated international effort that unfolded over the following 40 years. Global bans on harvesting nesting females. Turtle excluder devices fitted to fishing trawlers. Legal protections in dozens of jurisdictions. Beach monitoring and nest protection programmes. Education campaigns in coastal communities across the species' range.
And then, slowly, the numbers began to move in the other direction.
By 2025, green sea turtle populations had increased by approximately **28% compared to recorded levels in the 1970s and 80s**. The IUCN assessed the trend as sufficiently positive to reclassify the species from Endangered to **Least Concern** — the first time the green sea turtle has held that classification.
"The ongoing global recovery of the green turtle is a powerful example of what coordinated global conservation over decades can achieve to stabilise and even restore populations of long-lived marine species," said Roderic Mast, Co-Chair of IUCN's Species Survival Commission Marine Turtle Specialist Group.
**Twelve Bird Species Also Downlisted**
The green sea turtle is the headline, but the 2025 Red List update spread good news across multiple animal groups. Twelve bird species were downlisted in the same assessment, including the Rodrigues fody and the Rodrigues warbler — the last two bird species endemic to the small island of Rodrigues in the Indian Ocean. Both had teetered on the edge of extinction for decades; both are now classified as recovering.
The Alexandrine parakeet, a species native to South and Southeast Asia, was also downlisted. The Spix's macaw, which was declared extinct in the wild in 2000, continues to be the subject of a reintroduction programme in Brazil with cautious optimism from IUCN assessors.
Other species downlisted in the 2025 update include marine fish, freshwater invertebrates, and several mammal species whose habitats have been protected or restored in recent years.
**Rhino Poaching Hits Lowest Rate Since 2011**
Separately, IUCN's 2025 assessment confirmed that rhino poaching has been declining since 2021 — and reached its lowest level in 2025 since 2011.
Both African white rhino and Indian one-horned rhino populations have benefited from intensified anti-poaching measures, the establishment of better-monitored protected areas, and the political commitment of several national governments to treat poaching as a serious organised crime issue. In the Indian state of Assam, home to the world's largest one-horned rhino population, not a single poaching incident was recorded in 2025 — the best year in modern conservation records for that population.
**20 Species. Decades of Work.**
The IUCN's downlisting process is deliberately conservative. Species don't leave the threatened categories easily — the data must show sustained, verified population recovery across the species' range over multiple assessment periods. When 20 species are downlisted in a single year, it represents the vindication of enormous, sustained human effort.
It also represents something harder to quantify: the confirmation that it's possible. That species which were genuinely on trajectories toward extinction can be turned around. That the work of conservationists, governments, local communities, and scientists over decades produces measurable, real results.
"Biodiversity loss is not inevitable," said one IUCN assessor commenting on the 2025 results. "These species prove that."
*Sources: IUCN Red List 2025 Update · earth.org (February 2026) · IUCN Species Survival Commission · Mongabay · Guardian Environment*
