Beavers Returning to Sweden’s Capital Can Be a Dam Nuisance

Walking along the Swedish capital’s famous shores and canals, you can see its presence in the gnawed trunks of large willows, surrounded by fresh wood chips, and the stumps of damaged trees cut down with chainsaws.

The Eurasian beaver is back.

Though the furry urbanites had an ideal base to explore the city, it took decades for them to get established in Stockholm.

“From the late ’90s to 2011, we didn’t see very [many] beavers … about three or four a year in the whole Stockholm area,” says Tommy Tuvunger, who, as Stockholm’s viltvårdare, or game warden, is tasked with keeping tabs on the city’s wild residents.

In the last four years, “the population has exploded.”

But the beaver boom has a negative side: The rodents have done extensive damage to the city’s trees.These teeth-carved trees are a safety risk, especially in a city with so much green space.

“People are going there with small children, walking dogs, jogging,” Tuvunger says, adding that a gust of wind could bring a weakened tree down on someone.

In addition, there have been two reports of beavers biting people in Stockholm—one of which occurred after a man took a picture of the animal with his phone.

In their efforts to keep the public safe, Tuvunger and his colleagues have shot about 10 beavers over three years. (See “Killing Wildlife: The Pros and Cons of Culling Animals.”)

“Keeping a very low profile, we use silencers, so the public don’t know what were are doing,” he says.

That’s right. Arguably the smartest country on the entire planet, that takes it upon themselves to hand out awards for the most brilliant scientific minds across the globe, kills beavers for chewing trees with a SILENCER because they can’t possibly discourage chewing by wrapping them and they don’t want to upset the public.

It’s not surprising that Stockholm’s beavers have bounced back, the experts say.

“Beavers are like all rodents—they are really good at reproducing. If they have a good environment and good opportunities, they do well,” Jennersten says.

If the sight of Castor fiber swimming around in central Stockholm is the ultimate proof of success, Hartman is heartened by this latest chapter in its comeback story.

I’m tempted to hate the author of this story very much, but when I read those sentences back to myself it occurs to me that he might be deliberately not getting in the way of the Swedes making themselves look bad. Not because he agrees with them – but because Mr. Owen assumes the public won’t. You know, kind of like that famous Sarah Palin interview.

Anyway, this was an annoying way to start the day, which is already annoying because of the unecessary mural delays and the first reviews coming back on the urban beaver chapter – one of which edited MY section with a red pen and said it was “Poorly worded“.

Hrmph. Poorly worded!

Lets cheer ourselves with some good news, shall we?

Poplars popular with Seine River beavers

The beaver is one of the few species on Earth that modifies the environment to suit its needs. Unfortunately, the beaver’s needs sometimes bring them into conflict with people — especially in cities.

Beavers cut down trees for one reason — survival. They use large branches to build dams across streams. This creates a beaver pond, where the water becomes deep enough for the beaver to survive the winter. They use some branches and mud to build a lodge. The lodge has a central chamber where they are safe from predators.

Beavers also eat the trees’ inner bark. They stockpile branches in a food cache at the bottom of the pond. While beaver eat many aquatic plants during summer, their main winter food is the inner bark of trees. Their favourites are aspen, poplar, cottonwood, willow, birch and alder. Beaver do not hibernate, so the pond must be deep enough for them to swim from the lodge to their food cache beneath the ice.

My advice to anyone living near the river is to wrap the bases of the trees that you treasure. A few dollars of mesh can protect your $140 tree. Hardware cloth (with a square mesh) is tough enough to deter beavers.

Don’t wrap every tree. Wrap some of the larger trees and newly planted trees of all sizes. Leave the rest for the beavers. After all, the beaver is a Canadian icon.

This year, let’s celebrate the beavers that share our urban rivers. Take pictures of the amazing river engineer that we commemorate on the “tail” of our nickel. Post them on the Save Our Seine Facebook page. Volunteer to wrap some trees or join the SOS team as a 2016 River Keeper (job posting on the SOS Web site).

Did you know that Winnipeg was smarter than Stockholm? Fantastic article and fantastic idea for encouraging folks to appreciate urban beavers. Now a final piece of better news to cheer those of us waiting impatiently for better days. Jon took these photos yesterday down stream. Sure starting to look familiar isn’t it?