Because the beaver isn't just an animal; it's an ecosystem!


The city of Fairfield has the dubious distinction of being the birthplace of 3 generations of Perrymans. My maternal great grandmother was born there to a father that migrated from the Azores to be a sheepherder in Suisun. He had 11 children and died of the Spanish flu in 1918. His third son, my grandfather went to school and is buried there. When he married their eldest daughter was born there. Fairfield is big in our family history.

So you can imagine how happy I was to meet Virginia and hear her story,

Double Dam in Fairfield; Virginia Holsworth

It seems about the time that Covid made everyone stay home, she started to notice some interesting wood obstacles in her local creek. And when she walked in the mornings on the path along side the creek she noticed the dark rodents who tended them. Movie filmed by Virginia Hosworth.

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She kept looking and watching and noticed there were a number of dams running up the creek from the elementary school up to the canal. She came to enjoy watching the family antics in the morning and walked there frequently to see them. She talked to her friends and took movies of them with her phone. We met in the hallways on facebook and she asked me poignantly, “How do I keep them safe?”

Ohh if I only knew the magic formula! Solano is the county that kills the most beavers around these parts and fairield in particular and shown up in our depredation searches three times before. Usually right around when she was seeing them. But just because it hasn’t worked before doesn’t mean it can never work, right? Filmed by Virginia Holsworth.

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So Cheryl went to walk the area with her on Tuesday and learn what she could and I sent our new buddy Patrick Page out last night with the promise of beavers that wanted their picture taken. he sent this from one of the little dams in the middle.

Fairfield beaver: Patrick Page

The way I’m thinking is that first you get some photos, then you build some community, then you get some media attention, then you have a chat with the city. Fingers crossed we are inching along our way. The good news is that nobody will pay much attention to the creek until October so we have a little time. Expect more on this story soon.

Small fairfield dam: Patrick Page

Yesterday I listened to a very interesting webinar by WGBH in Boston which was basically author Ben Goldfarb interviewing author Judith D. Schwartz about her concept of nature using nature to heal itself. “Reindeer, Beaver, and Healing Nature With Nature”. 

He of course became a Judith fan reading “Water in plain sight” which included a section on beavers and a conversation with Brock Dolman. It was interesting to think about the role nature plays in fixing itself, even nature we’ve interfered with like Reindeer. It was even more fun seeing Ben treated like the ‘help’ instead of the famous author we all know he is. At the end the host asked them what books they were currently working and before Ben got to answer the host directed him to ask HER what she was working on.

Ben of course was a good sport and did a lot of beaver praising when he was allowed. It’s wild to think that Nature might be using wildlife to combat climate change.  From the beavers that show up in cities to the herded reindeer that stomp down the permafrost with their hooves.

Anyway it was a pretty fun listen. I don’t see a link to it but I’ll let you know if its online, Meanwhile there’s plenty of ordinary beaver headlines to keep us busy.

This headline in particular from a resource company made me snort my orange juice.

How Dangerous Is the Beaver?

With their oversized front teeth, beady little eyes and funny flat tails, beavers look less like crazed killers and more like the goofballs of the woods. Yet with their distinctive orange-colored incisors, these furry wonders can slash through a finger-sized tree branch with just a single chomp. So that begs the question: Are beavers dangerous to humans?

It turns out that yes, in certain circumstances, beavers might harm people and pets. But the truth is that beaver attacks make great headlines for one reason — they are incredibly rare.

“Beavers in the wild are not considered dangerous,” emails Michael Callahan, president of the Beaver Institute, which works to reduce beaver-human conflicts using non-lethal methods. “Unless they are threatened, the most aggressive behavior beavers will exhibit is slapping their paddle tail on the water to create a loud noise.”

I’ve been talking to reporters about beavers a while now, Mike. But I have to ask, how does one land such a prodigious beaver interview?


So the birthday bash was fun yesterday, and this is what I couldn’t show. A  few months ago I was alerted to the art of Joan White in Wisconsin by a reader from Pennsylvania who had commissioned a piece. I talked with Joan and sent her some of Cheryl’s awesome photos. And this is what she produced. It is painted on a slab of cedar that was taken down by a beaver near her home. The photo does not do it justice. In person it;s so luminous that it looks like the beaver is going to come right out of the water into our living room. Up in the corner on the left are two tiny and beautifully detailed frogs and a snail, with some lovely sparrows and fish at the bottom. At the bottom it is signed with the title we chose, “Amik”.

In addition to being an amazing artist, she is also a visionary. She looks at the wood and literally sees the animal images that are reaching to climb out of it. There’s a graphic on her webpage that previews the wood and then the amazing paintings she creates from each individual peice, You have to go look. Honestly, when I was a teen I saw a display of unfinished marbled carvings of DaVinci and it was very similar, beautiful images stuggling to come to life and leap from their humble beginnings.

Of course I had in the back of my mind that I might one day ask ev entually for a donation to the silent auction if everything worked out. But in explaining the beaver I told her about our work and she offered before we could ask. She is very fond of beavers and thrilled to meet someone who protects them. So she has that going for her too.

We think all the walls in the house are jealous now because they didn’t get one too. We might need to see what we can do about that.

Meanwhile, here’s a fun reminder from the New York Times that of the famous bronx beaver and the the nature that we displaced all around us that is ready to come back.

When the Bronx Was a Forest: Stroll Through the Centuries

With more residents than Dallas, more than Atlanta and San Francisco combined, the Bronx is a vast, vibrant megalopolis, which also happens to be New York City’s greenest borough. It’s home to the largest urban zoological garden in America, a park system nearly 10 times the size of Manhattan’s Central Park — and the city’s last remaining patch of old growth forest.

Colleagues of mine have found American Eels also returning to the river. The Bronx River is proof that given half a chance, nature finds a way back. You know the story of José.

No. Who is José?

Oh, well.

Back in 2007 I was in my office at the zoo one afternoon when some colleagues came by and said that on their lunch break, walking along the Bronx River, they saw a beaver. I said, “No, guys, you didn’t see a beaver, you saw a muskrat. There haven’t been beavers on the Bronx River for 200 years.”

They were, like, “We know what a beaver is, Eric.”

So the next day, I go with them to look, and sure enough, there were markings on a tree that were not made by a muskrat. They resembled the carvings of beaver teeth. A few days later a photographer got pictures of the beaver. Nobody knew what sex it was — probably a male because males disperse a lot farther. It was named after José E. Serrano, the United States Congressman from the Bronx who directed federal money to help clean up the river.

Everybody had thought the closest beaver population was up in northern Westchester or Putnam County, which meant that José must have traveled all the way downriver, through Scarsdale, through Bronxville, through these really lovely, ritzy neighborhoods in Westchester — and decided to live in the Bronx!

In the Bronx Zoo!

The beaver built a couple of lodges and knocked down a couple of big trees.

José knocked trees down?

Well, the wind did, with an assist from the beaver. At the zoo everybody was like, OK, all right, that’s what beavers do.

But the Botanical Garden was less happy about the whole situation. They put some metal guards around some of the trees. Then a few years ago another beaver showed up. So, now there were two of them. The Bronx River Alliance had the idea to ask schoolchildren in the neighborhood what they should call the new beaver. And the kids decided on Justin. Justin Beaver.

So now José and Justin live in the Bronx? I haven’t seen either one of them in a while.

Hmm. Eric, do you think maybe they’ve moved back to the suburbs? Yes. Maybe.

If you were reading this website back in 2008 (And why wouldn’t you be) you’d know all about Jose, and the Manhatta project, and the grounds keeper at the park that was keeping an eye on him. And you’d be able to explain to the fricken New York Times that beavers don’t KNOCK down trees for god’s sake.

They chop them.


August 12th is a prodigious day. It’s the day that in 1957 in the little naval hospital of Portsmouth England, Jon Ridler was born. In case the name sounds familiar he is the treasurer of Worth A Dam, the man of 100 tasks at the beaver festival including beaver tours, and my husband of lo, these many years. Happy Birthday Jon!

Jon was educated in England and enjoyed the life of a navy dental surgeon’s son living for a while in Malaysia, Gibraltar and some other places the sun never sets. His home base was always boarding school in Truro England though, down the peninsula of Cornwall near by where his grandfather retired, and oh by the way where some beavers were introduced after 400 years.

I mention this because Jon became an American citizen recently (because of all the winning obviously) and clearly England is so proud of their native son that they celebrated by making recently granting the Devon beavers legal status. Devon is at the top of Cornwall and about 100 miles away from where jon spent the vast majority of his early life. When the pilgrims sailed for America they boldly left from Plymouth which is the very tippy toes of Cornwall. Now beavers have been given a toe-hold.

Beaver families win legal ‘right to remain’

Fifteen families of beavers have been given the permanent “right to remain” on the River Otter in East Devon. The decision was made by the government following a five-year study by the Devon Wildlife Trust into beavers’ impact on the local environment.

The Trust called it “the most ground-breaking government decision for England’s wildlife for a generation”. It’s the first time an extinct native mammal has been given government backing to be reintroduced in England.

Environment minister Rebecca Pow said that in the future they could be considered a “public good” and farmers and landowners would be paid to have them on their land.

Beavers have the power to change entire landscapes. They feel safer in deep water, so have become master makers of dams and pools.

The River Otter beaver trial showed that the animals’ skill replenished and enhanced the ecology of the river catchment in East Devon.

They increased the “fish biomass”, and improved the water quality. This meant more food for otters – beavers are herbivores – and clearer and cleaner water in which kingfishers could flourish.

Their dams worked as natural flood-defences, helping to reduce the risk of homes flooding downstream.

Yes they do! Whoo whoo. There have been a few MILLION headlines about this story but I thought it could wait until Jon’s birthday, for obvious reasons.

The evidence gathered by researchers during the trial helped the Department for Environment, Food and Rural Affairs to make what it called its “pioneering” decision to give the beavers the right to live, roam, and reproduce on the river.

Beavers were hunted to extinction 400 years ago for their meat, furry water-resistant pelts, and a substance they secrete called castoreum, used in food, medicine and perfume.

In 2013 video evidence emerged of a beaver with young on the River Otter, near Ottery St Mary. It was the conclusive proof of the first wild breeding beaver population in England.

It was a mystery how they came to be there. Some suspect that the creatures were illegally released by wildlife activists who, on social media, are called “beaver bombers”.

The beavers faced being removed. However, the Devon Wildlife Trust, working with the University of Exeter, Clinton Devon Estates, and the Derek Gow Consultancy, won a five-year licence to study it.

Now there are at least 50 adults and kits on the river – and they are there to stay.

Peter Burgess, director of conservation at DWT, said: “This is the most ground-breaking government decision for England’s wildlife for a generation. Beavers are nature’s engineers and have the unrivalled ability to breathe new life into our rivers.

Congratulations Devon! And beavers all over England that definitely got one webbed paw in the door! And congratulations to Jon who I have loved for 39 years and who made all this crazy beaver madness possible. Wait until I show you his awesome present tomorrow.


I had a strange beaver day yesterday. In the morning the ‘fact-checker’ from Bay Nature called to verify some quotes about the Oakley beaver dam. Apparently a big article is coming in the magazine about the improvements to Marsh Creek. The beaver dam is a little side note of the restoration work they are doing. But it’s important to me that Oakley doesn’t get credit for those beavers, because they killed them, you know. So I verified and apparently will be quoted. Good.

Heidi in the Douglas Iris at Goat Rock 2001

Anyway while I was chatting with the fact checker I mentioned that the habitat wing of CDFW advised that the beavers NOT be removed, but the depredation permit was granted anyway because those two sides never NEVER communicate. The fact-checker laughed and said she knew all about that from a native plant perspective. She talked about the beautiful Douglas Iris of Pt Reyes and how they are actually classified as ‘invasive’ because cows don’t eat them.  Ranchers can object to them because they keep grasses from growing that cows would prefer.

Imagine!!! Who goes to Pt Reyes to take a photo of themselves with cows? I ask you?

Anyway when I exclaimed at this she said, “I’ve been so impressed with your work over the years and just wanted to let you know. I was actually at the festival tabling with Barbara at the Gardening for butterflies booth.”

Which was a little…small worldy…nice…disconcerting…weird…Bay Nature of course is the naturalist bible for the Bay Area and I treasure the little snippet they did on our beavers so much its in the scrapbook. And if you’re thinking, hey, I remember the otter issue, and the salmon issue, and the poppy issue but I don’t remember any issue of bay nature with beavers on the cover – (not just the Martinez beavers, mind you) – but ANY BEAVERS. You’d be right about the little thorn in my side all these years. I guess they think all that great habitat for the bays nature comes from the Army Corps of Engineers. But still, it was nice to think my beaver efforts have still been noticed by anyone. Even nicer to think Bay Nature will some day call me if they ever side to rectify that historic mistake.

The rest of the day was kind of like that. The reporter from the New Mexico forest article wrote to thank me for my nice review and confer about beavers and forests and fires. She’s planning another article on beavers through her work at Wild Earth Guardians. The I chatted more with the woman in Solano county who wants to save her beavers. Cheryl’s coming out after work to check it out and photograph.  Next I got a request from author Frances Backhouse to sign a release to allow my image of dad carrying the kit to be included in her new children’s book. Then I noticed that Mike Callahan dropped this video of his presentation in Connecticut and we conferred about the thumbnail.

That’s a pretty wide net of beaver contact for a day. Just saying. Oh the places you’ll go!

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BEAVER FESTIVAL XVI

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TREE PROTECTION

BAY AREA PODCAST

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