Durrell Wildlife Conservation Trust is dedicated to saving species from extinction through long-term conservation programs and science-based strategies. Their work spans decades and includes restoring ecosystems, building local capacity, and engaging communities to reduce threats and recover endangered species. One way in which they measure the impact of their work is using the Durrell Red List Index.  This is based on the Red List Index, a global tool used to track how the survival probability of species has changed over time.  Over 30 years, Durrell’s target species have shown a 38% improvement in survival probability, compared to a predicted 41% decline without intervention. This reflects a 135% higher survival chance due to programs led by Durrell or in which they played a significant role. Durrell’s contributions to saving species extend beyond this. A 2020 study identified all the birds and mammals whose extinction has likely been prevented by conservation actions over a 30-year period.  Of the 60 species identified from around the world, Durrell led or provided significant support to 18% of these prevented extinctions.  Durrell's structured, evidence-based approach combines species and ecosystem recovery with professional training and community partnerships, ensuring long-term impact for both biodiversity and people. This model has made Durrell a leader in conservation.  It shows that, given time, conservation works and that Durrell, working alongside partners, can and does reverse the fortunes of species on the very brink of extinction.

Durrell’s approach to saving species from extinction is rooted in long-term, science-based conservation programs, designed to address the unique threats faced by each target species. They use a wide range of indicators to measure their impact and were the first organisation to trial the use of the global Red List Index to track changes in extinction risk of a set of species targeted by the interventions of one organisation and its partners. The Durrell Red List Index measures changes in the extinction risk of their target species over time. By comparing real-world outcomes with a counterfactual scenario - what would have occurred without conservation - Durrell track the long-term impact of their work.  The Durrell Red List Index demonstrates that the survival probability of their target species improved by 38% over 30 years, versus a predicted 41% decline with no intervention. The survival chances of their target species are on average 135% higher than they would be without conservation. A 2020 scientific study identified all the birds and mammals whose extinction has likely been prevented by conservation actions over a 30-year period.  Of the 60 species identified from around the world, Durrell led or provided significant support to 18% of these prevented extinctions.

Documentation to demonstrate all this is shown in the studies: - 'Preventing extinctions post-2020 requires recovery actions and transformative change' (2020, Bolam et al) - 'Accounting for conservation: using the IUCN Red List Index to evaluate the impact of a conservation organisation' (2014 Young et al). - 'Claim Breakdown Diagram*: Durrell is saving species from extinction'. *The Claim Breakdown Diagram is a structured, visual guide designed to clearly outline a specific claim. It breaks the claim into key components, including the initial vision, the precise claim itself, supporting metrics using the SMART framework, conclusions drawn arguing what kind of documentation would most effectively support the claim being made, and the required documentation that gets uploaded to the platform. This approach ensures that claims are transparent, credible, and backed by robust evidence, making them visibly accessible for public and stakeholder review.