It is one of the smallest islands in the Indian Ocean. At just 18 kilometres long and 8 kilometres wide, Rodrigues Island sits 560 kilometres east of Mauritius, in a stretch of ocean far from the nearest continent. Its human population is 44,000. Its land area is 108 square kilometres.
And on this tiny island, two species of bird — found nowhere else on Earth — came within a handful of living individuals of vanishing forever. Instead, they are now thriving, reclassified by the global conservation authority as **Least Concern** — the highest recovery status a species can achieve on the IUCN Red List.
This is the story of how it happened.
**The Rodrigues Fody**
The **Rodrigues fody** (*Foudia flavicans*) is a small, bright-orange songbird found only on Rodrigues. By 1968, the species had been pushed to the absolute edge of extinction: biologists counted just **5 to 6 surviving pairs** — perhaps 12 birds in total — surviving in a tiny fragment of native forest.
The causes were familiar from island extinction stories worldwide: **deforestation** (Rodrigues lost most of its native vegetation to agriculture and fuel-gathering over two centuries of settlement), and **invasive predators** — particularly rats and cats introduced by human settlers, which devastated ground and low-nesting birds.
At 12 individuals, the fody was one of the most endangered birds on the planet.
**The Rodrigues Warbler**
Faring only marginally better was the **Rodrigues warbler** (*Acrocephalus rodericanus*) — a small, unremarkable-looking brown bird that is, in fact, the last surviving member of its lineage on the island. By 1979, ornithologists estimated just **8 to 9 pairs** remained. The warbler was considered functionally extinct in the 1960s — observers had stopped reporting it altogether.
**The Rescue**
The turnaround began with the **Mauritian Wildlife Foundation (MWF)**, the same organisation that achieved the miraculous recovery of the Mauritius kestrel (from 4 wild birds in 1974 to a self-sustaining population today). Working with local authorities and international partners, MWF launched a multi-decade programme for Rodrigues built on two core strategies:
🌳 **Native forest restoration** — Rodrigues was progressively reforested with endemic plant species, restoring the complex habitat that the fody and warbler depend on for nesting and feeding. By 2025, thousands of hectares have been planted or restored.
🐀 **Invasive species management** — Rat and cat populations were systematically reduced across key areas of the island, removing the predators that had been suppressing bird reproduction for generations.
The results, accumulated over five decades of patient work, are remarkable:
| Species | Year | Population | |---------|------|-----------| | Rodrigues fody | 1968 | 5–6 pairs (~12 birds) | | Rodrigues fody | 2025 | **20,000 individuals** | | Rodrigues warbler | 1979 | 8–9 pairs (~18 birds) | | Rodrigues warbler | 2025 | **25,000 individuals** |
**The IUCN Verdict**
In 2025, the International Union for Conservation of Nature updated the Red List assessments for both species:
✅ **Rodrigues fody:** reclassified from Endangered → **Least Concern** ✅ **Rodrigues warbler:** reclassified from Endangered → **Least Concern**
"Least Concern" doesn't mean the work is done — it means the population is large enough, stable enough, and well-enough distributed that the species is no longer at meaningful risk of extinction in the near term.
For a species that existed as 12 individuals in 1968, that is an almost incomprehensible transformation.
**Why This Matters**
Island species face among the highest extinction risks of any wildlife on Earth. Islands contain roughly 20% of global biodiversity but account for over 60% of recorded bird extinctions. When island species are lost, they are lost forever — there is no other population, no wild refuge, no genetic backup. The Rodrigues fody and warbler existed *only* on Rodrigues. There was no Plan B.
The fact that both came back from the equivalent of a handful of individuals to stable populations of tens of thousands — while existing only on a single small island — is not just good news for Rodrigues. It's a proof point that island conservation works. That it's worth the effort, worth the decades, worth the investment in rats and cats and native seedlings.
From 12 birds. To 20,000.
Sometimes the maths of extinction runs the other way. 🐦
*Sources: Mauritian Wildlife Foundation · IUCN Red List (2025) · ZME Science (October 2025) · Mongabay · La Gazette de Rodrigues · BirdLife International*
