Teenage Naturalists Lead Successful Harvest Mouse Reintroduction

A Tiny Success in Devon

In the rolling green landscapes of Devon, two thirteen-year-old best friends have achieved something truly remarkable. Eva Wishart and Emily Smith, both dedicated young naturalists, have successfully spearheaded a significant conservation initiative aimed at bolstering the population of Britain’s smallest rodent: the harvest mouse. While many teenagers might spend their summer afternoons focused on hobbies or sports, Eva and Emily have spent the last two years turning their family homes into dedicated breeding centres. Their ambition was clear from the start: to tackle the decline of a species currently classified as near-threatened in Great Britain. This grassroots project highlights how local action, driven by passion and determination, can make a measurable difference for our native wildlife. By dedicating their time and energy to the breeding and care of these delicate creatures, the pair has demonstrated that age is no barrier to environmental stewardship.

Transforming Homes into Refuges

The scale of the girls' operation is as impressive as their commitment

Throughout their two-year journey, Eva and Emily managed an astonishing twenty-seven breeding tanks within their homes. To ensure their project was as sustainable as possible, they sourced the necessary materials through local recycling efforts, showing a keen awareness of environmental impact. The logistical challenges of keeping such a large number of rodents healthy and safe were immense, yet the duo approached each hurdle with maturity and foresight. They were not working entirely alone, however; the project received expert guidance from rewilding specialist Derek Gow. His professional insight proved invaluable, providing the framework for the girls to carry out their breeding program in a way that prioritized the welfare of the mice and ensured the success of the eventual reintroduction. This collaborative effort between experienced conservationists and young enthusiasts serves as a template for how intergenerational knowledge transfer can benefit the natural world.

A Community Effort for Nature

The success of this project was not limited to the girls' bedrooms; it rippled out to encompass the wider community in Devon. Recognizing that a successful reintroduction requires more than just breeding the mice, the local community rallied behind Eva and Emily. Residents joined in to prepare the environment for the newcomers, planting cocksfoot grass to provide the specific cover and food sources these tiny rodents need to thrive in the wild. Additionally, the community came together to dig a pond, further enhancing the habitat and ensuring the local nature reserve was a welcoming home for the mice. This collective spirit underlines the importance of local ecosystems and the impact of individual actions on the wider landscape of Great Britain. The sight of these young naturalists leading the charge, supported by their neighbors, showcases the power of community-led rewilding.

Releasing a New Generation

The culmination of two years of intense preparation arrived on August 27, 2025

On this landmark day, Eva and Emily conducted a soft release of two hundred and fifty harvest mice into a local nature reserve. A soft release is a careful process that allows the animals to acclimate to their new surroundings gradually, giving them the best possible chance of survival. Watching two hundred and fifty mice return to the wild was a moment of triumph for the teenage naturalists and a testament to the thousands of hours they invested in their project. As Britain’s smallest rodents, these mice play a specific role in the ecosystem, and seeing their numbers increased so significantly by the effort of two local teenagers is a massive victory for conservation.

Looking Toward the Future

The work of Eva Wishart and Emily Smith serves as an optimistic beacon for the future of British wildlife. It proves that the challenges facing near-threatened species are not insurmountable when young people are empowered to act and communities provide the necessary support. The success of this Devon-based project is a powerful reminder that we all play a part in protecting our natural heritage. As we look at the progress made since that day in late August, it is clear that Eva and Emily have set a high bar for environmental action. Their dedication has not only helped restore a population of harvest mice but has also inspired a broader conversation about how local efforts can help reverse the decline of vulnerable species across the UK. With passionate young naturalists leading the way and expert guidance to light the path, the future of our smaller, often overlooked species looks just a little brighter.