Beaver families thriving in the West Country after unofficial reintroductions

By James Ashworth, National History Museum

 

Beavers have returned to the waters of Somerset and Wiltshire, hundreds of years after being wiped out.

Escapes from enclosures and unlicensed introductions are suspected to be behind the rodent’s return.

As many as 50 beavers could be living in the West Country, Natural England has revealed.

The government’s nature advisor had been investigating the possibility of beavers in the region following reports of the rodents in and around the Rivers Frome and Avon. The resulting report, published earlier this month, found a wealth of evidence that beavers were thriving in the areas, including dams, gnawn trees and burrows.

In total, it is estimated there could be anywhere from 36 to 62 adult beavers in sections of the rivers near Bath, Chippenham and Trowbridge, living in 13 families. If baby beavers, known as kits, and family units living in areas of the river which couldn’t be surveyed are included, then this figure could be even higher.

A spokesperson for the Avon Wildlife Trust previously described the presence of beavers in the area as ‘extremely significant’, adding that ‘the presence of this beaver population will support other wildlife and help us to tackle the ecological emergency.’

Where have the West Country’s beavers come from? 

Eurasian beavers are rapidly being reintroduced across the UK, having been driven to extinction in the country over 400 years ago through hunting for the fur, meat and perfume trade. The mammals are now present across the country, from Scotland all the way south to Devon and London.

Officially, beavers can only be reintroduced into enclosures with a license from the government. However, many beavers are living wild following escapes from these sites, as well as unofficial introductions.

For instance, one of the UK’s largest populations of beavers can be found in Tayside, Scotland, is thought to be the result of a mixture of accidental and illegal releases.

While beavers are now considered a native species in England, Wales and Scotland, it is still a crime to release them without a license, which can result in up to two years in prison as well as an unlimited fine.

Many of the beavers in the West Country are thought to have been released unofficially, with the report estimating that these have probably taken place since 2016. Others, meanwhile, may be the descendants of animals which escaped from a private collection in the 2000s.

The beavers have now spread widely, with the majority of the families found in the River Frome, a tributary of the River Avon. Four families are found in the Avon itself, while another is found on the By Brook.

Though there had been reports of beavers in the River Brue and Kennet and Avon Canal, the latest report didn’t find enough evidence to verify their presence.

In total, the beavers may occupy as much as 11% of the available riverbanks in the areas of Wiltshire and Somerset where they live. Each family is estimated to have a bankside territory as long as eight kilometres, which is above average for England’s beavers.

While they may cover a relatively large area, the beavers are not thought to be having a major impact on their ecosystem at the moment. Though some families have started building dams and felling trees, the majority are still getting established in their new home.

With beavers having been made a protected species in England in October 2022, it’s thought that their populations will only grow if left undisturbed. While the report notes their activities could eventually pose a risk to transport, this is not likely in the near future.

Instead, it recommends further research to promote co-existence with these beavers. Assessing their genetic health, and coming up with management plans, can help to ensure these rodents can keep beavering away in the West Country.

There’s more info on the website.  But don’t miss this flattering article below! They really did a great job of describing just how valuable we are!

Beavers are “ecosystem engineers” and fight climate change, too.

By Conall Rubin-Thomas & Steve Blackledge, Environment America

The signs are instantly recognizable: partially chewed trees, pointy stumps and sprawling collections of sticks and logs in the middle of waterways. These all signal the presence of beavers, the plump, semi-aquatic critters that were once nearly hunted to extinction.

Established wildlife laws and reintroduction brought their numbers to stable levels, but they still remain a fraction of what they once were. Further recovery of beaver populations is crucial.

Because they significantly alter, manage and even improve the areas around them, beavers have earned the title of “ecosystem engineers.” Their work enhances the surrounding landscape and ecosystems, making these critters some of the most important, not to mention adorable, stewards of nature. Here are five ways beavers help the environment.

Beavers help control water flow. 

You might assume that since beaver dams block water, they must cause floods, but that’s far from the case. Dams are penetrable structures that slow water flow, resulting in less erosion and flooding than undammed, fast flowing water. Dams physically store water on land where it soaks into the soil and initiates plant growth, able to turn bone-dry areas into bountiful wetlands. If you repeatedly visit beaver habitat in different seasons, you can see the transformations that take place thanks to their dams. A landscape often looks completely different from even just a few months prior.

Beavers improve water quality.

Rainwater runoff from artificial surfaces washes toxins into waterways, threatening aquatic ecosystems. Wetlands surrounding beaver dams act like kidneys by removing pollutants from water, effectively cleaning it. As dams decrease water flow, nutrient-rich sediment usually swept away by the current instead sinks and collects on the bottom. This abundance of minerals filters and breaks down harmful materials like pesticides and leaves areas downstream of dams healthier and less polluted than upstream.

Beaver activity creates more habitat for other wildlife. 

Since beaver dams slow water flow, the original path is altered as the water meanders over additional ground, creating more wetlands where other species thrive. Important plants that feed animals and provide for people see their numbers increase over 33% in beaver wetlands, while birds nest on riverbanks, fish swim about and mammals forage for food in these natural havens. In fact, 25% of species living in these wetlands fully depend on beaver activity for survival.

 

 

Beavers stop wildfires. 

Increasing wildfires destroy nature and emit greenhouse gasses, but beaver activity can hold the devastating flames at bay. Wetlands made by beaver dams concentrate water and moisturize the landscape, making it harder for fires to spread as potential fuel becomes harder to burn. Wildlife can shelter in these wet sanctuaries, safe from an encroaching blaze. Beavers might not drive red trucks or slide down poles, but they make an excellent fire department nonetheless.

Beavers help us fight climate change. 

The primary driver behind climate change is the massive amount of carbon human activity pumps into the atmosphere. The more we emit, the more it builds up, but beavers help reduce its accumulation as their wetlands absorb and store the greenhouse gas. Globally, beaver wetlands hold 470,000 tons of carbon each year and perform carbon-capture work worth tens of millions of dollars. Restoring beavers to their natural habitats and widespread numbers can lead to further carbon absorption as the animals proliferate, construct dams and establish more wetlands. More beavers mean more wetlands, which mean less atmospheric carbon, a win-win-win scenario.

The incredible feats beavers perform should not be understated, whether it’s their beneficial environmental work or ability to transform landscapes. As the world’s foremost natural ecosystem engineers, they play crucial roles in managing nature unlike any other animal. You can celebrate these incredible critters on International Beaver Day every April 7. The next time you’re hiking and come across those telltale bites on trees or piles of sticks, be sure to thank a beaver for all they do in supporting the natural world by just being their busy little selves.

Bob