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

Category: Recent Sightings


I promised I would offer Cheryl’s adorable otter picture from Friday night, when he snorted at her and demanded she leave the area in his “I’m an otter” manner. Look at the teeth on that charmer and tell me he isn’t eating well! With our kits long past danger-size its easier to just enjoy this unexpected visitor. Lots of water movement. Lots of noisy eating and satisfied crunching. Otters are fully prepared to enjoy everything they do — and you just ruin it. They make sure you know.

Let’s see what else. Well, the city of Oshawa promised their beaver-saving residents they’d find a non-lethal solution. They pointedly ignored the names and suggestions of every single professional we sent them and went back to the same environmental firm that said killing them was the best option in the first place. Then they awarded them a contract of 60,000 dollars to do a few tweaks and monitor the situation. 60,000 dollars! You could bring Skip, Mike and Sherri in dancing costumes for that kind of money! (Hmmm…that sounds kinda fun. Next years festival?) The paper is calling it a ‘temporary solution’ which it may well be. (I of course wrote and asked if they used the same headline when they recommended trapping, which is also a ‘temporary solution’.)

Oh and the council did keep their promise and try to find out the gender of the beaver that was ‘accidentally’ trapped after the trapping had been halted. Guess what they learned? The trapper, a seasoned and pragmatic animal culler with years of experience, told them that “you couldn’t know the sex because beaver sex parts are all on the inside.” No, I’m not kidding. (Mind you, I’m fairly certain that delicate condition describes half of any species ever discovered). He means of course that even male beavers have no external sex characteristics. They do have a different anatomical structure but it takes a moment (and an ounce of training) to identify and by then the body was already tossed in the incinerator and he was off for his next job. For the record, I am wholly certain that sexual organs would be of no use to any species whatsoever if they all remained inside…just saying.

Which brings us to Riga, Latvia where the city kept its promise to hold a ‘contest’ to solve the pesky beaver problem which gave them an excuse to let maintenance slag while tires and crates clog up their culverts. It rained a massive amount a while back and now their streets and parks are flooded and of course its the beavers fault. Go watch the video and tell me whether you think a few beaver dams created that problem.  Apparently 90% percent of the population thinks they did, which was obviously the point of this machiavellian delay. One article says that the items seen here, ripped from a culvert were “used by beavers in their dam making”.  (Ahh many’s the morning I’ve watched mom and dad beaver painstakingly laying tires on the dam. I just start to worry when they take them directly off the cars.)

Now before we in Martinez get full of righteous indignation at those Northern European Neanderthals, I must keep my other promise, which was to talk about sheetpile and what I learned from Alex’s Riga photos. The city park has a series of canals that are lined with sheetpile for stability. Alex sent some lovely pictures for us to ponder including this one:

Click on the picture to see it larger. Look at those lovely manicured banks. Gosh, I would like to go there. Look at that even line along the waters edge. It almost makes the sheetpile invisible.  I wish our sheetpile ended at the waterline like that. Wait a minute. Wait just a worthadam minute! Why doesn’t it? Why on earth does the sheetpile wall in Martinez continue 8 feet up the bank? Um, because of the beavers? Nope. Beavers only dig holes they started under the waterline, not into the bank like badgers. Are you sure about that? I mean they are pretty darn destructive. Yes I am sure. When beavers dig their massive caverns under the ground they enter from below the water line. Look it up.

So what’s all that sheetpile there for? Why is their concrete poured behind it? Why doesn’t ours end at the water or a foot above it (to account for tides) like Riga’s? Why isn’t it like the historic sheetpile wall at the waterline Worth A Dam discovered in historical photos? Because, dear readers, the sheetpile wall was never put there to stop beaver damage. It was put there to stop water damage. So that in the high flow months, when water pours down the gutters and streets and floods the creek like it did last winter (when the beaver lodge was completely under water), it won’t erode the bank and cause damage to the property. This is what the city of Martinez promised to do way back when they made creek businesses pay a special assessment into the flood abatement project 10 years ago. This is what Martinez ran out of money for by the time they got to Escobar Street. This is what that particular property owner always resented and why he wanted meeting after meeting about the beavers. And this is how the beavers gave them all an excuse to solve the problem once and for all.

(Beavers change things. It’s what they do.)

So we get 8 feet of sheetpile, lose half a million dollars, turn one of our most visible and visited stretches of creek into a scene from “cannery row” and the floods are averted.

I guess cities do keep promises – just not in the way you’d expect.


Did you watch that video of the green heron below? There are several remarkable things about it. Green Herons are shy, secretive birds that are often hard to get a good view of. First look at him rapidly approaching and stretching that huge neck. You almost never see green herons looking ‘long necked’, they usually look like hunched craggy bird-grandmas. Then see how he’s stalking towards the beaver kit, and trying to get as big as possible to scare him away.

Last nights visit from the weirdly territorial green heron got me reading about these remarkable birds. I sadly couldn’t find any articles about crazy green heron chasing beaver but that didn’t stop me from looking. The coolest thing I found out about them is that they are considered one of the few “tool using birds”. Green Herons use bait to catch their fish. Check it out.

Apparently they’ll drop bread, earthworms, or insect parts into the water and wait until a fish comes to nibble it. They crouch in a low ball so the fish doesn’t see them, and so their neck looks short and curved and not at all threatening. When the fish comes they flash their beak and snap it up it. Unlike human fishermen, they are smart enough to use the same bait over and over again.

Not every green heron uses this technique every time it fishes apparently but its widespread enough to make the books.  After watching last nights display I am no longer surprised by anything these feathered carnivores do. Or the sight of these strangers stopping by city hall this morning. Far be it from me to comment on the fact that the Martinez City Council doesn’t usually meet in August. Another Special Meeting?

Don’t worry, Jon made sure they all got home safe. Oh and thanks, Gary, for this. If you haven’t sent in your vote for the park name, make sure you do so today!


Vermette pointed out where beavers had built a dam across one of the waterways, thus raising the water level behind it significantly. In many areas beavers can be problem animals, but here their dam slows the water flow still more, thus enhancing the marsh’s role in improving water quality.

Considering the bitter smack much of New York has been happy to talk about beavers, this article is a breath of fresh air. It describes two graduate students charged with monitoring, testing and studying the area, and who have been particularly enthusiastic about the effect of the resident beaver dam. The article goes on to describe how beavers often cause problems and dams are routinely destroyed by the transportation department, but how these students petitioned to let these particular beaver stay and help the polluted waters. Guess how well its working? The bemused article makes it sound like this healing dam is something unique or special, and sadly doesn’t mention that beavers could be bestowing the same gifts everywhere if they were just allowed to live. I wrote them the following:

Gerry Riser’s charming piece about the beaver dam improving water quality in Woodlawn wetlands seems to suggest that the good work done by this helpful dam is the exception rather than the rule. The truth is that once the transportation department stops wasting taxpayer dollars on futile dam removal and invests instead in real solutions like flow devices and culvert fences, every waterway, stream and creekside can be significantly improved by the addition of beavers. The secret wetlands of Woodlawn are only rare in their appreciative scholars: beavers benefit any waterway that is lucky enough to have them.

I heard from Sharon of Beavers: Wetlands & Wildlife that they did a consult for a flow device in the area as well, so Buffalo should know better than to think ripping out dams is the solution.

Photo: Berryessa US DEPT of Interior

On a entirely different note I saw amazing footage taken by Moses yesterday morning of a MASSIVE otter in the area between the dams. His long whiskers and huge size let us know this is an otter that has seen many, many summers. Moses wasn’t willing to share the footage with the website, but keep your eyes peeled. We didn’t see sign of him last night, or the beavers either for a good long time and I was starting to get nervous. The kits eventually emerged as cheerful as you please, GQ crossed delightfully over the dam, a muskrat swam by and three green herons flew in for a squabble on the filter. All in all, it’s a pretty healthy habitat. Hear that Buffalo?


Our own Cheryl Reynolds snapped this lovely photograph a few nights ago. It is beautiful look at a beaver on his own terms. I am certain we are in agreement about this being an excellent picture but we differ in our thoughts of whether this is Dad or a yearling  (Clearly with those wide eyes it’s not mom!) Cheryl was impressed with the overall size of the beaver and his somewhat cautious approach. I look at the smooth, ungrizzled lines of that narrow face and think this is a young dapper yearling ready to take life by storm. Dad must have seen six years now, and I think his face shows it more.  Perhaps you’d like some beaver mysteries of your very own, so head down to the dam and find a few! If you see anything, write and let us know. Worth A Dam stalwart LB has recently taken on the sightings page, and has been updating cheerfully with the excellent detail.

Last night this fun read caught my attention. Beaver friend Brock Dolman sent Ashlee my way for an interview and I was hoping it would be a positive voice for beaver benefits. Whadaya think?

Leave It to Beavers?

Nature’s water engineers can restore river channels.

By: Ashlee Green

It can cost millions of dollars to restore a river channel with artificial ponds and bulldozers. Some ecologists recommend turning to beavers, nature’s water engineers, who will do that work for free.

Ahhh isn’t that a lovely beginning? Sigh. Get the popcorn and the throw blanket. This is going to be a cozy read.

Ecologists working in the Feather River watershed have unearthed evidence of beaver activity dating back more than 1,000 years. They say the animals were a natural part of the watershed, and restoration techniques like “pond and plug” resemble beaver dams, which clean up river water by trapping silt and organic material.

I actually gave her a very nice quote which she didn’t use, about having engineers “on site 24/7 to make repairs” but, still, I didn’t come out half bad anyway.

Dr. Heidi Perryman, president of the beaver advocacy group Worth A Dam, in Martinez, Calif., says beaver dams create habitat for fish and the insects they feed on. And when beavers chomp on trees, that stimulates dense regrowth, creating vegetation that’s appealing to birds.

She offers a nice collection of links to follow up with, which I helpfully directed her to. Sadly it doesn’t link to the single most useful beaver website on the entire planet, (ahem) but hopefully that was an oversight and people will use their google to come find us anyway.

Careful observers of this website will notice that there are two new flyers in the left hand column. (Click on the thumbnail to go to the pdf) The first is for the talk I’m giving Monday for the organization “Close to Home” in Oakland. I would love to see some familiar faces there, so if you’re not doing anything that night you might stop by! The second is the flyer for the beaver festival, which I just finished putting together yesterday. Looks like its going to be a dam good time!

No ‘seven maids’ update today. I am too depressed. Not just by the oil washing up in Alabama or the stupidity of Tony Hayward thinking he could apologize for his enormous narcissistic uncompassion by saying he was sorry for whining that he “wanted his life back”. No, I was depressed that the head of the NOAA is backing up BP’s denial and pretending not to see the mile long plumes of oil under the sea, even as she pays teams of researchers to study what isn’t there. Favorite part of the article?

“I’m not in denial” she insisted.

Do people actually say that?

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