A major conservation milestone has been reached in the heart of the East Midlands as more than forty rare hazel dormice were released into the ancient woodlands of the Bradgate Park Estate. This significant reintroduction effort, led by the People’s Trust for Endangered Species, marks the second consecutive year of releases at the site, effectively doubling the local population and providing a vital lifeline for a species that has seen its numbers plummet across the United Kingdom. The initiative is part of a wider, thirty-year national recovery programme aimed at reversing the fortunes of one of Britain’s most elusive and best-loved native mammals.
The hazel dormouse, easily identified by its golden-brown fur, large black eyes, and distinctive furry tail, has become a symbol of the challenges facing British wildlife. Since the turn of the millennium, the species has suffered a devastating decline of over seventy per cent. Habitat loss, fragmented woodlands, and changes in traditional forest management have left many populations isolated or completely extinct in various counties. In Leicestershire, the species had become a rarity until the first phase of this reintroduction project began in 2025. The arrival of this latest cohort of forty dormice is a bold statement of intent to ensure the species remains a permanent fixture of the local landscape.
The release process is a delicate operation that begins months before the animals ever set foot in the Leicestershire soil. The dormice involved in the project are captive-bred through a network of specialist breeders. Before they are deemed ready for life in the wild, they must undergo a rigorous period of quarantine and health screening. For the 2026 release, a significant number of the dormice were cared for at Twycross Zoo, where experts monitored their health to ensure they were free from disease and physically robust enough to thrive in a natural environment. This careful preparation is essential for the long-term success of the reintroduction, as it ensures that the new population starts with the best possible chance of survival.
Strengthening the local ecosystem
The choice of Bradgate Park for this reintroduction was far from accidental. The estate, which is both a Site of Special Scientific Interest and a National Nature Reserve, offers some of the highest quality ancient woodland remaining in the county. Conservationists spent years evaluating the site to ensure it provided the complex habitat structure that hazel dormice require. These tiny mammals are arboreal, meaning they spend the vast majority of their lives in the canopy, rarely descending to the forest floor. They need a diverse range of trees and shrubs: such as hazel, honeysuckle, and bramble: to provide a continuous supply of food from spring through to autumn.
Evidence from the initial release in 2025 has already shown that the habitat is performing exactly as hoped. Monitoring of nest boxes during the autumn of that year revealed that the original twenty-one dormice had not only survived but had successfully bred, with multiple litters of young recorded. The population had effectively doubled within just a few months of their arrival. This early success provided the scientific justification for the 2026 release, with the new group of forty dormice intended to boost genetic diversity and create a more resilient, self-sustaining population. By introducing individuals from different breeding lines, experts hope to avoid the risks of inbreeding that often plague small, isolated wildlife groups.
The impact of the dormice extends beyond their own species. As a "bio-indicator," the presence of a healthy dormouse population suggests that the woodland itself is in excellent condition. The management techniques required to support them: such as hazel coppicing and the maintenance of thick, interconnected hedgerows: benefit a wide array of other species, including woodland birds, rare butterflies, and various other small mammals. The reintroduction is therefore a central pillar of a broader effort to restore the ecological health of the Leicestershire countryside, turning the Bradgate Park Estate into a beacon for biodiversity in the region.
A national recovery effort
While the local success in Leicestershire is a cause for celebration, the project is part of a much larger national strategy. The People’s Trust for Endangered Species has been coordinating dormouse reintroductions since 1993, with this latest release marking the thirty-eighth such event in the programme’s history. Over the last three decades, more than a thousand dormice have been returned to woodlands across thirteen different English counties. Each release is a piece of a larger puzzle, designed to create "stepping stones" of habitat that allow dormice to move across the landscape and recolonise areas where they were once common.
The national decline of the hazel dormouse is a complex issue rooted in the way the British landscape has changed over centuries. Historically, the practice of coppicing: cutting trees back to ground level to encourage new growth: created the dense, scrubby habitat that dormice love. As this traditional form of woodland management fell out of fashion, many woods became dark and overgrown, losing the understorey of shrubs and berries that the dormice rely on. Furthermore, the removal of hedgerows to create larger agricultural fields has cut off many woods from one another, leaving dormice stranded in small patches of habitat where they are vulnerable to local extinction.
By focusing on large-scale reintroductions and working with landowners to restore hedgerow connections, the national programme aims to create a landscape where wildlife can move and adapt. The success at Bradgate Park is particularly significant because the site sits within the National Forest, a visionary project that has seen millions of trees planted across the Midlands over the last thirty years. The integration of dormice into this maturing forest landscape represents the next stage of the region's environmental transformation, moving from the creation of woodland to the restoration of the complex animal communities that should inhabit them.
Conservation and community monitoring
The release of the dormice is not the end of the story, but rather the beginning of a long-term commitment to their welfare. Once the animals arrive at Bradgate Park, they are placed into "soft-release" enclosures. These are large mesh cages positioned within the woodland, filled with natural foliage, nest boxes, and supplementary food. This allows the dormice to acclimatise to the local weather conditions and the sounds of the forest while remaining protected from predators. After a period of about ten days, a small opening is made in the mesh, allowing the dormice to begin exploring the wider woodland at their own pace.
Monitoring is the cornerstone of the project’s second phase. A dedicated team of rangers and volunteers from the Leicestershire & Rutland Wildlife Trust and the Leicestershire & Rutland Mammal Group will spend the coming months and years checking hundreds of nest boxes scattered throughout the wood. These checks provide vital data on survival rates, breeding success, and how far the dormice are spreading from the initial release site. For the volunteers involved, it is a rare opportunity to get close to a species that is notoriously difficult to see in the wild, given their nocturnal habits and preference for the high canopy.
The long-term vision for the Leicestershire dormice is one of expansion. As the population grows, it is hoped that they will begin to move out of the initial release wood and into adjacent areas of the Bradgate Park Estate and beyond. The collaboration between conservation charities, local wildlife groups, and land managers is essential to this goal. By ensuring that the woodland remains well-managed and that the dormice are carefully monitored, this project offers a blueprint for how threatened species can be successfully returned to the British countryside. The return of the hazel dormouse to Leicestershire is more than just a local victory; it is a testament to the power of dedicated, long-term conservation and a reminder of what can be achieved when the right habitat is met with the right expertise.
