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

Month: April 2009


To ride on mom’s back in the beaver world, apparently. Last night a kit saw  her approach and swam to hitch a lift. It was very sweet to see Mom and Junior together, sharing treats. All three kits made an appearance and only Dad was too sneaky to show his face. Some appreciative diners came down for the beaver show and were rewarded with a full stand in the water and a nice glimpse of orange teeth.

Photo: Cheryl Reynolds

Haven’t seen mom go for any fennel yet, but its about ten days before observed it last year. Mom is looking very round indeed, and we are fairly certain she’s pregant.  Check out the video in the sidebar and pause a moment to remember that we are heading for the anniversary of the presentation of the beaver subcommittee report. You remember, the meeting where the council refused to vote and Mary Tappel said the beavers were leaving?


April is the cruelest month

TS.Eliot

In case you’ve been too busy to notice, it’s spring out there and birds are pairing off. Nests, long since crafted or discovered or reclaimed, are now natural Easter baskets full of eggs, and parents are trapped by their biological inheritance into sitting on them, waiting for precious cracking noises. ‘Tis the season for Nest cam watching, and from New York to Singapore devoted fans check in on feathered families from eagles to owlets.

A famous local webcam follows the peregrine falcons who nest in the PGE building in downtown San Francisco. The word “peregrine” means “wanderer” and peregrines have one of the largest migrations of any bird. Tundra-nesting birds winter in South America, with a yearly range of 15,000 miles.  Now peregrines are medium sized falcons that eat smaller birds and catch their prey in flight. Falcons can dive at about 200 miles an hour. They are a species of bird we almost completely eliminated in the 60’s by our use of the pesticide DDT.

In case you haven’t heard this story, DDT was a cheap efficient pesticide used for years to control mosquitoes and other disease-spreading insects around the world. In the 60’s, naturalist-author Rachel Carlson drew attention to its harmful effect on wildlife with her famous book Silent Spring. She described how birds in particular were harmed because DDT affected the thickness of the eggshell, so loving parents trying to hatch their young were crushing their offspring to death. Her book was a best seller, compelled the issue to the forefront and by the 1970’s we had stopped using DDT in the united states.

Fast forward to 2009 and there are still only 45 breeding pairs of Peregrines in the state of California, so interested parties like the Santa Cruz Predatory Bird Research Group tend to keep a close eye on them. In fact, a couple years back the PGE peregrines thought maybe they’d find new real estate and took up shop in another very expensive building in down town San Francisco. The birds pull so much weight that the new million dollar renter couldn’t even move in until nature had taken its course.

I got interested in the SF Peregrines after reading about them in the paper. Local businessman Glenn Nevill began photographing their escapades on his lunch hours or before and after work. George and Gracie were the lovely pair in residence at the time, and in 2005 they launched four beautiful offspring. It may seem odd to think of Peregrines in big cities, but remember they are used to steep cliffs, narrow canyons and vast buffet tables of pigeon. One of the most amazing parts of Peregrine courtship was when George would bring food to Gracie on the nest: he’d drop it for her from the sky, and she would catch it on the wing.

Some have asked why my youtube name was “Bigonegeorgegrace” and its actually for them. (Its supposed to be Bygone not Big One)…and my first movie was an attempt to record their interaction using the webcam. At that time I saw a huge community grow around interest in these birds, people who would show up every week to watch in person or just keep track on line. As they got closer to first flight, volunteers were all over the city to spot if their were problems. One bird jumped before his time and fell into traffic in front of a Fed Ex truck. The quick-thinking driver wisely stopped, put the squawking fellow in a box, and brought him up the corporate elevator back to his nest.

He was nicknamed  “Otis”.

Through Glenn’s amazing photographs, or in person with binoculars and scopes, we watched those birds learn to fly, joining their parents, practicing diving, catching a pigeon of their very own. One of those four fledges hit a clear windowed building and was instantly killed.  People were heartbroken, and I was much sadder than I expected to be. I realized that care for these birds had made a community which stretched from Marin to Santa Cruz and the wide world beyond. Now the big faceless city of San Francisco was this intimate little peregrine feeding ground and the home of thousands who cared about them.

Perhaps you can see some similarities.

Why would Eliot call April, bursting with life, the cruelest month? Well anyone who watches it closely knows it’s also bursting with death: eggs that don’t survive or nests that are raided and failed launches that end in instant loss or slow suffering. I can’t say whether that’s what he meant, but its what I think when I read it. The more species you care about in the world, the more risky April becomes.

This year’s peregrines are Dapper Dan and Diamond Lil. She has laid four eggs in the scrape (peregrines nest on gravel) and you can watch their progress here.


During the week I usually get a few beaver-related blurbs that aren’t juicy enough for a full post but are still are worth sharing. This week was no exception, and I’m thinking that Friday is the perfect day to run some little stories to get us ready for the weekend.

First up is the exciting back story to LK’s butterfly observation. She wrote that she was seeing clouds migrating over highway 4. Apparently she wasn’t the only one. Gary Bogue wrote a column for this week’s Contra Costa Times on the enchanting migration of “painted ladies”, from the desert of their birth in Southern California. In case you missed them, here’s one to identify for next time.

How about another reason to reintroduce beavers in Scotland? This news from the BBC talks about an alarming decline in the Cranefly population, leading to a staggering loss in the bird population. The problem is climate-change related, cause by the loss of pools where flies can reproduce. The article suggests creating a series of (wait for it) little dams. “For example, by blocking drainage ditches on our Forsinard reserve in the North of Scotland we hope to raise water levels and reduce the likelihood of the cranefly larvae drying out in hot summers.” Now we know what can make and maintain those little “ditches” for you.

Remember the beaver problem that appeared every morning for conflict resolution to a South Carolina Farmer? Kristin was wondering how to adapt a beaver deceiver to a spillway, so I wrote Skip Lisle and he got in touch with her. Soon those beavers will be roundly deceived.

If you have an even longer memory you might recall the beavers at the Mendenhall Glacier in Juneau Alaska. They had the good fortune to attract some hardworking volunteers (and an award winning photographer) who gathered together to regularly help undo the beavers most troublesome handiwork.The beavers were slated for extermination but temporarily saved from the executioner. We admired their effort and got in touch with them. The primary concern was allowing passage for large Coho Salmon and making sure that beavers, (or beaver-devices), didn’t interfere with this lucrative fishy business. Word is that they are working hard to secure a comprehensive beaver management plan for the area; one that doesn’t include trapping. More on this later.

There will be another class at Mt. View Sanitation next weekend, specifically on planting for pollinators. It will be taught by Jeff Alvarez, founder of The Wildlife Project who it turns out is a big fan of our beavers and has agreed to help his friend Kelly help us with our interpretive sign design. Let’s get some beaver friends to increase the turnout.

Go Native – Planting for Pollinators
Saturday, April 11, 9:30 am – 12:30 pm

Attract birds, butterflies and beneficial insects. Learn to diversify
your garden by including California native plants that provide food, shelter and nesting places for wildlife.

Nothing to do the weekend after that? Wrong. The John Muir Birthday-Earthday Celebration will be an rollicking good eco time. Plan to be there on Saturday April 18th between 10 and 4. In addition to the bagpipes, remarkable displays, performances, and the ever popular recycled trash fashion show, Worth A Dam will be in prominent display, our first since fall. We will be raffling two hard to get tickets to the Creek Seekers Express eco tour ride from Jack London to Martinez. It will feature a guided lecture from the marine curator of the Oakland Museum and never before seen footage of the Martinez Beavers.  Don’t miss your chance at getting to participate in this historic opportunity.


“Looking Up” By Sylvia Forrest

Our tree planting project is coming together nicely. Yesterday our intrepid potential eagle scout MM addressed the council about the planting and got himself and our trees on the agenda for the April 15th city council meeting. He even had the mayor and councilman Menesini praising him for his very civic interest in our habitat. He wisely emphasized cooperation with Friends of Alhambra Creek, and saved “Worth A Dam” for his soto voice.  All in all, a deft entry into local politics. Congratulations, and we’ll be there next week to support you!

For my part, I met yesterday with Felix Ratcliff the biologist from Condor Country Consulting, and we walked the habitat and talked beavers. He was an enthusiastic nature fan, with a keen attention to detail. He loved seeing the beaver lodge and the many chewed stumps in the area. When we visited the washed out fourth dam we awakened  three pond turtles sleeping on its back. He had a nice understanding of the variety of the beaver diet, and was interested in when we had observed them eat tulle, fennel, blackberries.  MM will be presenting Felix’ report to the council so that we can get approval to plant trees.

Thanks everyone for your help yesterday, and thanks beavers for reminding me how generous people can be with their time and support.


Woke up to another email alert about beaver killing in Warwick, Rhode Island. The director of public works, David Picozzi, is beleaguered by having his crews pull down some pesky beaver dams, and complains that they shockingly just rebuild after the men leave. Biologist Charles Brown (charles.brown@dem.ri.gov) who works for the Department of Environmental Management, which does not list beavers on its wildlife page, thinks, “its a weird spot for them”, and says “they couldn’t have come through salt water or overland”.

Sigh. All of Martinez could write this letter. We know beavers swim through saltwater to get the home of their dreams, and we know how many times they’ll rebuild a dam. We even know the range of problem-solving skills demonstrated by a director of public works. When you write the paper, make sure you add that Mike Callahan of beaver solutions is a 90 minute drive away, and Skip Lisle, the inventor of the beaver deceiver, is a couple hours north.

Any city smarter than a beaver can keep a beaver: the sad thing is, so few cities are.

The Warwick City Webpage has disabled Public Works email, but here is the phone number (401) 738-2000 x6500.

Figure: Mike Callahan

BEAVER FESTIVAL XVI

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