Until quite recently, Londoners living and working near the Greenford tube station in West London were forced to literally wade through floodwaters to get to work. Following heavy downpours, the station’s ticket hall was routinely flooded, while local residents were forced to constantly rely on sandbags. The local council was facing massive expenditures to solve the issue until help arrived from a species that manages such tasks better than any engineer—the beaver.
The return of nature's engineers.
Four centuries after beavers were hunted to extinction in England, 2023 marked their triumphant reintroduction. The site chosen was Paradise Fields, a 10-hectare plot in Ealing that previously served as a golf course. This initiative led to the birth of the Ealing Beaver Project.
Seeking to demonstrate how these natural engineers can bolster London's climate resilience, conservationists secured a license to release five animals into a stream flowing through the area. The project is a collaboration between the Ealing Wildlife Group, the nature restoration organization Citizen Zoo, the Friends of Horsenden charity, and Ealing Council, with support from the Beaver Trust and the Mayor of London's office.
Correcting mistakes and shaping new landscapes.
The animals set to work immediately, reshaping the environment around Greenford. They built a series of dams, resulting in the creation of a new lake almost overnight. Furthermore, the beavers even dismantled an old dam previously erected by volunteers, replacing it with their own significantly more efficient design. Notably, the animals also found time to expand their family, producing offspring within a year of their arrival.
The beavers' handiwork has not only mitigated flooding by retaining excess water and slowing its flow, but it has also dramatically increased the region's biodiversity while saving the local council substantial sums that would have otherwise been spent on traditional engineering projects.
An ecological boom.
"Over the last 11 months, we have seen four new species arrive. One of these is the stickleback, which now lives alongside dragonflies and damselflies. We have also spotted the redpoll, a bird that typically only stops here during migration," explains Mustafa, a member of the project team.
"The variety of species is simply staggering. This month alone, we recorded at least 14 different species of butterflies. We are also seeing tadpoles, freshwater shrimp, and toads. None of this would have happened without the beavers," he adds.
A lesson for the cities of the future.
The success at Paradise Fields has become a prime example of how rewilding and nature-based solutions can be both environmentally and economically effective. These beavers, once extirpated, are now providing free and efficient protection for West London against the elements, creating thriving wildlife oases right in the heart of the metropolis.
