For years, the gentle rustle of grasses and the tell-tale “plop” of a water vole diving into a stream were absent from the Lake District’s riverbanks. These much-loved mammals, made famous as ‘Ratty’ in The Wind in the Willows, were once widespread across the Lake District. Habitat loss, pollution and the spread of the invasive American mink pushed water voles to the brink, and they disappeared from much of this rugged landscape.
Today, that story is changing.
Over the past three years, 750 water voles have been reintroduced across Cumbria, marking one of the most significant species recovery efforts in the region. Crucially, monitoring now shows signs of successful breeding and populations beginning to spread naturally, a strong sign that water voles are once again finding a foothold in Cumbria’s rivers and wetlands.
This work has been led by Cumbria Connect partner Eden Rivers Trust, working alongside the Environment Agency and other partners across the wider Cumbria Connect programme area. Cumbria Connect is a large-scale nature recovery partnership working across 42,000 hectares between the Lake District and Yorkshire Dales, restoring rivers, floodplains, peatlands and woodlands to reconnect habitats, support wildlife recovery and strengthen climate resilience. By restoring rivers and floodplains at a landscape scale, the partnership is helping create the space and conditions water voles need to survive and thrive.
Why water voles disappeared
Water voles are one of the fastest declining mammals in the UK. Once boasting a population of around eight million, fewer than 132,000 remain today. They have been lost from around 94% of their former range, including much of the Lake District.
The arrival of the non-native American mink has been a major driver of this decline. Water voles did not co-evolve with mink, a voracious predator, and have few defences against them. Without targeted action, entire colonies can be wiped out in a very short time.
Reversing this decline has been a race against time. What we are seeing now shows what is possible when river restoration, species recovery and partnership working come together.
Preparing rivers and wetlands for water voles
Reintroducing water voles is about far more than releasing animals into the wild. Long-term success depends on healthy habitats, connected river corridors and effective mink control.
River conservation charity Eden Rivers Trust, supported by funding from Cumbria Connect, the Environment Agency’s Water Environment Improvement Fund (WEIF), the Moorhouse Fund (Cumbria Community Foundation) and The Ernest Cook Trust, has worked closely with landowners, volunteers and local communities. Over several years, this work has included restoring rivers and wetlands and putting effective American mink control in place.
Water voles have been released at key sites in the Cumbria Connect programme area, including Cumbria Connect’s core sites: the Lowther Estate and Wild Haweswater, which is managed by the RSPB and owned by United Utilities. The first phase of these reintroductions marked the first within the Lake District National Park. These carefully phased releases followed extensive habitat restoration, creating connected river and floodplain environments that support natural movement and population growth.
To strengthen resilience, the project worked with water vole specialists Derek Gow Consultancy to source captive-bred animals with genetics closely matched to those that once lived in Cumbria.
A keystone species returns to Cumbria
The results are now starting to show. Monitoring has confirmed breeding at release sites, and water voles are beginning to disperse naturally along connected restored river corridors. This marks a crucial milestone in species recovery and shows that restored habitats are functioning as they should.
Water voles might be small, but they play an important role in river ecosystems as a keystone species. Their burrowing and grazing help shape riverbanks, creating space for a wider range of plants, insects and other wildlife. Their return brings complexity and resilience back to Cumbria’s rivers.
This work forms part of Cumbria Connect’s wider landscape-scale approach to nature recovery. By restoring rivers, reconnecting floodplains and improving habitat condition, we are creating the foundations for wildlife to recover naturally.
Bill Kenmir, Conservation Manager for Cumbria Connect, said:
“This reintroduction shows what is possible when we restore whole landscapes rather than isolated sites. By creating connected habitats, we’re giving water voles the space they need to thrive and spread.”
At Lowther, water voles are now living alongside beavers for the first time in over 400 years. A family of beavers has been introduced in a carefully managed enclosure, and the water voles now live alongside them. Beaver activity raises water levels and creates wetland habitats that complement water voles’ needs.
Jim Bliss from Lowther said:
“Beavers and water voles co-exist happily. Their activities complement each other, creating a richer, more diverse landscape.”
Nature is working with nature again, and the early signs suggest the impact could be transformational for Cumbria’s rivers and wildlife.
This article was originally posted on the Cumbria Connect website. To find out more, visit the Cumbria Connect project page.
