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Beavers once roamed the U.K. before being hunted to extinction. Now, they are gradually returning through carefully managed reintroduction projects.
“None of this was here last year,” Pia Trevelyan-Ashby, an urban rewilding officer at Citizen Zoo, tells me proudly. We’re looking at a wetland with lakes, trees, and several species of birds. Hidden in their lodges, an estimated nine beavers are resting.
Once extinct in the U.K., hunted for their fur and for castor oil, beavers have returned and transformed this site next to a retail center in West London into an attractive green space that not only invites recreation, but also improves biodiversity.
“Our beavers are thriving. They came in October 2023, and have completely transformed the landscape by cutting trees, building dams, and raising water levels. Our bio-acoustic monitors tell us that we now have more bird species, bats, freshwater invertebrates, toads, frogs, and insects — the whole ecosystem has come alive,” Pia explains.
Citizen Zoo is a social enterprise committed to rewilding and conservation. With the support of the U.K.’s Beaver Trust, they got a license for beavers to be reintroduced into a fenced enclosure in Paradise Fields, Ealing. The Trust identified “problem beavers” that were unwelcome in farmlands, making it possible to release a family of five at the site using humane methods, such as spacious cages, as part of the Ealing Beaver Project.
Taking Ownership
Part of Citizen Zoo’s work now is to clear up prejudices against these charismatic mammals. Before releasing the beavers, the team had to tackle challenges like local skepticism toward the animals and doubts about fencing off the area.
Though the animals do not destroy forests or catch fish, their dam-building can disrupt farmlands. But here, in a large enclosure, their engineering work is an asset.
Now, Şeniz Mustafa, London’s first urban beaver officer, is running beaver safari tours for the community, inspiring a change in perception and building a sense of ownership among the beavers and their neighbors — local schoolchildren have even named the beavers.
The Best Habitat Managers
Originally, city officials had planned a concrete-based wetland alleviation system on this site, for a cost exceeding six figures. But the Ealing Beaver Project was a far more affordable alternative with a cost of £150,000 GBP (roughly $200,000 in U.S. dollars) so far.
Elliot Newton, director of rewilding at Citizen Zoo, advises other cities to be open-minded to nature-based solutions. And as cities everywhere face rising flood risks and biodiversity loss, London’s experiment offers a low-cost blueprint for future-proofing that could inspire urban planners far beyond the U.K.
Despite London’s hottest summer on record, the beavers reshaped the wetland, which now protects the area from both flooding and droughts. Citizen Zoo hopes to attract more mammals and birds.
“We have a dynamic space here, an incredible ecosystem with adaptable species,” Pia says. “The beavers are keeping the vegetation young. They are the best habitat managers you can get.”
Key Takeaways
Nature-Based Solutions: The Ealing Beaver Project was a far more affordable and effective alternative to a proposed concrete-based system for wetland alleviation. Citizen Zoo hopes this can inspire other communities to be open-minded and advocate for natural, environmentally friendly solutions — like rewilding or using local wildlife — to solve civic challenges such as flood risks and biodiversity loss.
Engage the Community: Citizen Zoo successfully countered local skepticism through public outreach, including their beaver safari tours, which helped build a sense of ownership toward the beavers. Often, community education and hands-on engagement are vital for the long-term success of local conservation projects.
The Value of Local Wildlife: The beavers transformed the site that they were reintroduced to and were hailed as “the best habitat managers” for making the ecosystem come alive. Native species play a critical role in supporting conservation efforts and healthy ecosystems.
