Don’t Cut Trees in the Nesting Season!

This year, the issue of tree-trimming or cutting during the nesting season was highlighted by the sad destruction of black-crowned night herons’ nests when the Oakland Post Office decided to get its trees trimmed. Five young herons were injured, others may have died. The tree trimmer potentially faced criminal charges, but was so remorseful – and so willing to pay for the care of the baby herons – that everyone was relieved when he didn’t.

Most people just don’t know that it’s a bad idea to trim trees (or worse, remove them) during the nesting season. Even aggressively trimming undergrowth could damage or destroy birds’ nests.  In San Francisco, the season extends approximately from February to September, depending on many factors including the weather.

Each year, Wildcare, a wonderful organization that rehabilitates hurt or orphaned wildlife,  gets a deluge of baby birds during the summer. Most of  them are displaced by tree-trimming or removal.

2012-04-11 bewick's wren nesting

Birds nests are difficult to spot, even for experts. Herons’ nests are large and noisy, and the Oakland Post Office staff surely knew the birds were there. But most birds hide their nests. Unless they are huge ones like nests of hawks or owls, the parent birds need to conceal their young from predators. Humans, who typically aren’t really looking out for them, would usually miss seeing them altogether. It may take even experienced birders hours of observation to be sure. Nests of hummingbirds, for instance, are around the size of a quarter. They’re common in San Francisco but very difficult to spot.

BROCHURES AND INFORMATION

Here’s Wildcare’s page  “Stop! Don’t Prune Those Trees!”  It explains the problem in a user-friendly way, and also gives references of two bird-friendly arborists who can do emergency work if needed.

 “Spring (and summer!) are busy baby season— procrastinate now!

When is wildlife nesting? There is some variation, but most wild animals have their babies in the spring, between March and June. However, many species will also have a second brood in July or August if food supplies are sufficient. If you can plan to trim your trees in the winter months, you can completely avoid the possibility of damaging a nest. It’s also a healthier time for the trees, when the sap has gone down and trees will be in their dormant phase. Call WildCare at 415-456-7283 if you’re unsure when it is a safe time to trim or remove a tree. “

The Golden Gate Audubon Society has published an excellent brochure:  Healthy Trees, Healthy Birds that is available as a PDF on their website. Here are pictures of the brochure (the download will be clearer and can be printed).

GGAS Healthy Trees Healthy Birds brochure 1

GGAS Healthy Trees Healthy Birds brochure 2

IT’S ILLEGAL TO DISTURB BIRDS’ NESTS

Disturbing – or worse, destroying – a birds nest is illegal. It’s a strict liability offense punishable by up to six months in jail and/or a $1,000 fine per offense.  There are laws at the Federal, State and City level. Here’s what they say:

  • Federal Migratory Bird Treaty Act. This applies to over 1,000 bird species, including many that are found in San Francisco. It makes it ” …illegal for anyone to take, possess, import, export, transport, sell, purchase, barter, or offer for sale, purchase, or barter, any migratory bird, or the parts, nests, or eggs of such a bird…” (“Taking” means to harass, harm, or pursue a bird.)
  •  California State Code 3503, 3503.5: ” It is unlawful to take, possess, or needlessly destroy the nest or eggs of any bird, except as otherwise provided by this code or any regulation made pursuant thereto.”  California State Code 3503.5 relates to birds of prey: ” It is unlawful to take, possess, or destroy any birds in the orders Falconiformes or Strigiformes (birds-of-prey) or to take, possess, or destroy the nest or eggs of any such bird except as otherwise provided by this code or any regulation adopted pursuant thereto.”
  • San Francisco County Municipal Code 5.08: It’s unlawful “to hunt, chase, shoot, trap, discharge or throw missiles at, harass, disturb, taunt, endanger, capture, injure, or destroy any animal in any park...” (with exceptions for small rodents like gophers).

The general rule is to stay 50 feet away from song-bird nests, and 500 feet from raptor nests.

TREES IN “POOR CONDITION” ARE GREAT FOR BIRDS

Sometimes, trees are removed because they’re in poor condition – dead or dying. Those are often the very trees that birds love, especially those that nest in cavities. Like this flicker (a kind of woodpecker) nesting in a half-dead eucalyptus tree. If you weren’t watching very patiently, you would have no idea that a family of young birds (three in this case) were being raised here.

The eucalyptus-tree nest hole of the red-shafted flicker - San Francisco. Janet KesslerPLAYING SAFE

The only safe way is to NEVER cut trees or thin dense bushes during the nesting season – and even when working in the off-season, typically September to February, to be very observant and watchful before starting work.

Young Great Horned Owls being raised in Eucalyptus tree

Relentless War on Eucalyptus – The Example of Glen Canyon

This article is reproduced from MillionTrees.me – the website of Death of a Million Trees with permission and minor formatting changes.

A new front has opened in the relentless war on eucalyptus in California. The drought has given native plant advocates an opportunity to develop a new narrative to justify their demands for eradication of eucalyptus. The opening gambit in this new strategy is an item in Jake Sigg’s “Nature News” of May 16, 2014:

“The prolonged drought of the last 2-3 years seems to be taking its toll. The Tasmanian blue gums in Glen Canyon along O’Shaughnessy Boulevard strongly show drought stress. The stress is more evident from the high cliffs above O’Shaughnessy than it is at ground level. Thinning crowns and discolored foliage was striking. And that was before the recent heat wave. Barring substantial rains–unlikely, but not impossible–the trees are in serious trouble. The City could have an emergency situation and no money to address it.”

RECAP OF THE WAR ON EUCALYPTUS

When public land managers began the war on eucalyptus in the 1980s it did not occur to them that the public would object. So deep was their prejudice against eucalyptus, that they assumed the public shared their opinion. The first two massive projects in the 1980s on National Park Service and State Park properties were greeted with angry public protests. Land managers quickly learned that it was not going to be as easy to eradicate eucalyptus as they had thought. They developed a series of story-lines to justify their projects, which were designed to convince the public that the eradication of eucalyptus is both necessary and beneficial. This is a summary of some of their cover stories with links to articles that debunk them:

Based on our experience, we were immediately suspicious of the new claim that San Francisco’s eucalyptus forest is dying of drought. We know that our predominant species of eucalyptus—Tasmanian blue gum—grows successfully throughout California, all the way to the Mexican border in climates that are much hotter and drier than the Bay Area. We also know that the central and north coast of California is foggy during the dry summer months, which doubles the amount of annual precipitation in the eucalyptus forest. All reliable sources of horticultural information describe blue gum eucalyptus as drought tolerant. Frankly, we couldn’t see how our eucalyptus could be dying of drought.

WHAT IS WRONG WITH OUR EUCALYPTUS FOREST IN GLEN CANYON?

The picture became clearer when Jake Sigg posted the following on his “Nature News” on June 12, 2014:

“The June 10 newsletter [see below*] included an editorial on an evolving catastrophe, mostly involving our numerous plantations of Tasmanian blue gums. The editorial focused primarily on the plantations on O’Shaughnessy Blvd in Glen Canyon and on Mt Sutro, and included a photo of a grove of Mt Sutro dying trees. Here is a photo of the Glen Canyon plantation, taken from above the high cliffs on O’Shaughnessy. The damage is most visible from high, looking down. The discoloration of leaves was very dramatic, but the foliage color and condition is not fully conveyed in the photograph. Some trees defoliated entirely in the prolonged winter dry spell. Look very closely at the juvenile blue leaves of the coppice shoots; anything that appears faintly bluish are new coppice shoots which grew in response to the late rains we had in February and March. Once you see coppice shoots on old trees you know the trees are in trouble. These trees are in double jeopardy, as they invested energy in new shoots, but were betrayed by another dry spell which, under normal circumstances, will last until autumn. Note that you can now see the grassland through the trees; that slope was not previously visible. Even a casual inspection of these groves reveals dead, dying, and stressed trees, and under normal circumstances we will have four or five months of dry. The fire situation is serious right now and is likely to become worse.”

 

View of west side of Glen Canyon Park from Marietta Drive, June 2014

View of west side of Glen Canyon Park from Marietta Drive, June 2014

With more specific information in hand about what Jake Sigg is looking at, we went to see for ourselves. We could see what he was describing from a vantage point on Marietta Drive, west of Glen Canyon Park. We could see lighter colored leaves, but they were more localized than Jake Sigg’s description implied. We didn’t feel qualified to speculate about why the leaves were lighter colored so we recruited an arborist to help us figure out what is happening there. We were fortunate to enlist the help of a certified arborist who has been responsible for urban forests on public lands in the Bay Area for several decades. This is what we learned.

EPICORMIC SPROUTS

Looking through binoculars from our vantage point on Marietta Drive, the arborist said immediately, “Those are epicormic sprouts.” The leaves of epicormic sprouts are distinctively lighter colored than the darker green of mature eucalyptus leaves. They are also a more rounded shape than the long, pointed mature leaves of eucalyptus. This is how Wikipedia describes epicormic sprouts: “Epicormic buds lie dormant beneath the bark, their growth suppressed by hormones from active shoots higher up the plant. Under certain conditions, they develop into active shoots, such as when damage occurs to higher parts of the plant. Or light levels are increased following removal of nearby plants.”

Epicormic sprouts on trees in Glen Canyon Park, June 2014

Epicormic sprouts on trees in Glen Canyon Park, June 2014

The remaining question was why some of the eucalypts, were producing these epicormic sprouts, when most were not. We went down to O’Shaughnessy Blvd to get a closer look, hoping to answer that question. This is what we learned:

  • The understory of non-native shrubs between O’Shaughnessy Boulevard and the trees with epicormic sprouts has been cleared in the past year. We could see the dead brush piled up next to the trees. We had to wonder how people who claim to be concerned about fire hazard could think such huge piles of dead brush were nothing to be concerned about.

 

Remains of dead non-native brush destroyed along O'Shaughnessy Boulevard, June 2014

Remains of dead non-native brush destroyed along O’Shaughnessy Boulevard, June 2014

  • We could see the stumps of some of the dead brush and we wondered if the stumps had been sprayed with herbicides after they were cut. Pesticide use reports for Glen Canyon indicate that O’Shaughnessy was sprayed several times in the past year, twice with products containing imazapyr. Imazapyr is known to be harmful to trees if sprayed in proximity to their roots. The trees with epicormic sprouts were downhill from the understory shrubs that were destroyed, in the probable direction of water and herbicide flow.
  • We found several trees that had been girdled in the past and are now dead.
Girdled tree in Glen Canyon Park, now dead, June 2014

Girdled tree in Glen Canyon Park, now dead, June 2014

THE TREES IN GLEN CANYON PARK

Then we walked into Glen Canyon Park from its southern end. It’s not a pretty sight. Many huge, old eucalypts have been destroyed. When they were destroyed, their stumps were immediately sprayed with herbicide to prevent them from resprouting. The stumps are simultaneously painted with dye so that workers can tell which trees have been sprayed. The dye is no longer visible, but regular visitors took photos of the painted stumps before the dye faded. The spraying of the stumps do not appear on the pesticide use reports of the Recreation and Park Department. We assume that’s because the spraying was done by the sub-contractors who destroyed the trees.

Poisoned and dyed eucalyptus stump, Glen Canyon Park, 2013.  Courtesy San Francisco Forest Alliance

Poisoned and dyed eucalyptus stump, Glen Canyon Park, 2013. Courtesy San Francisco Forest Alliance

The arborist who walked in the forest with us said, “The painting of stumps with RoundUp or Garlon in proximity to trees that are being preserved can kill the neighboring preserved tree. Stumps near living, residual (preserved) trees should not be painted with RoundUp or Garlon if the stumps are within 40’ of mature, blue gums that are slated for preservation.” If the remaining trees are damaged by herbicides, their mature leaves fall and epicormic sprouts will then emerge as the tree recovers.

Some of the stumps of the trees that were destroyed in Glen Canyon Park in 2013.  Taken June 2014

Some of the stumps of the trees that were destroyed in Glen Canyon Park in 2013. Taken June 2014

While the trees were being destroyed in 2013, the Natural Areas Program was eradicating non-native vegetation in the Canyon. They sprayed ivy, blackberry, and valerian with Milestone, which is another herbicide that is known to damage trees if sprayed near their roots. In addition to these official applications of herbicide in this park, there is a long history of unauthorized, illegal herbicide applications by “volunteers,” more appropriately called vandals. We saw a lot of epicormic growth in the Canyon, sprouting from stumps that must be cut back and resprayed with herbicides. It usually takes several retreatments to successfully kill the roots of eucalypts that are destroyed. We also saw epicormic growth from eucalypts that had been severely pruned and were also exposed to a great deal more light because they had lost the shelter of their neighboring trees.

Epicormic growht, Glen Canyon Park, June 2014

Epicormic growth, Glen Canyon Park, June 2014

WRAPPING UP

The trees in Glen Canyon are reacting to the traumas to which they have been subjected: the loss of their neighbors that were either girdled or cut down thereby exposing them to more light and wind, the loss of the shelter of their understory, the application of herbicides known to be harmful to trees. The good news is that there are still plenty of trees in Glen Canyon that have not yet been destroyed and they are in great shape. Here is the view of the tree canopy in Glen Canyon taken from the east side of the park near Turquoise Way. The first picture was taken in December 2012 (before the current round of tree destruction in Glen Canyon Park) and the second picture was taken in May 2014.

Eucalyptus canopy on east side of Glen Canyon Park, taken from Turquoise Way December 2012, before tree destruction began.  Courtesy San Francisco Forest Alliance

Eucalyptus canopy on east side of Glen Canyon Park, taken from Turquoise Way December 2012, before tree destruction began. Courtesy San Francisco Forest Alliance

Same perspective of Glen Canyon tree canopy, taken May 2014.  Courtesy San Francisco Forest Alliance.

Same perspective of Glen Canyon tree canopy, taken May 2014. Courtesy San Francisco Forest Alliance.

These trees are doing just fine because the Natural Areas Program has not yet gone that deeply into the park. But NAP intends to destroy many more trees in Glen Canyon (and elsewhere) when the Environmental Impact Report (EIR) for their management plan (SNRAMP) is finally approved. Then we will see more consequences of the destructive practices of the Natural Areas Program and we will probably hear more bogus explanations for that damage. We expect the EIR to finally be considered for approval at the end of 2014. We will do whatever we can to convince San Francisco’s policy makers that they should approve the “Maintenance Alternative” which would enable NAP to continue to care for the native plant gardens they have created in the past 15 years, but prevent them from expanding further. We hope that our readers will help to accomplish this important task.


*Jake Sigg’s Nature News of June 10, 2014, introduced the theories of Craig Dawson about the health of the Sutro Forest. Mr. Dawson’s speculations are different from Mr. Sigg’s and we will not address them in those post.

Wisconsin, Trees and Our Health

This is another of our first-person accounts. A reader visited Madison, Wisconsin and returned this report.

We were riding to the airport when traffic slowed on a tree-lined street owing to roadwork. I was reminded of a  friend’s comment about Minnesota: “We have two seasons – winter, and road repair.” Madison isn’t as extreme, but the warm days of spring are when this kind of  project gets done.

street lined with trees with yellow ribbons - madison WI

Necessary work, of course, but as I looked out the window I was saddened to see the trees on either side had yellow tape around their trunks. In San Francisco, colored tape  or paint spots usually mean the tree’s going to be cut down.

another tree with yellow ribbon in madison WINearly every tree along the road had a yellow ribbon. Madison’s a very green city with a lot of tree canopy, so perhaps they figured they could spare the trees that impinged on the road work or grew through power lines.

yellow ribbon tree in madison WI

But then, as we stopped completely, I could read what was actually written on the yellow ribbons. It said “TREE PRESERVATION ZONE.”

tree preservation zone madison WI

THE MENTAL HEALTH BENEFITS OF MORE TREES

Perhaps they had paid attention to the research from University of Wisconsin (whose campus is only a few miles from where we’d paused). It showed less stress and depression in people who live in areas with more tree canopy. Here’s an excerpt from the UW-Madison press release on the research, which was published in April 2014.

“Across neighborhoods of Wisconsin, from the North Woods to the cities, the results are striking,” says Dr. Kristen Malecki, assistant professor of population health sciences at the UW School of Medicine and Public Health. “Higher levels of green space were associated with lower symptoms of anxiety, depression and stress.”

The study, published recently in the International Journal of Environmental Research and Public Health, combines mental-health data from the Survey of the Health of Wisconsin (SHOW) and Landsat 5 satellite data from July 2009 that analyzed how much vegetation was present in each of the SHOW census blocks.

About 2,500 Wisconsin residents from 229 neighborhoods answered an assessment that asked them to rate their symptoms of depression, anxiety and stress. The research team, which was also led by Dr. Kirsten Beyer of the Medical College of Wisconsin in Milwaukee, adjusted the results to make sure they weren’t confounded by race, age, income level, education, marital status, employment and other factors.

They found that across all strata of society, people who lived in a neighborhood with less than 10 percent tree canopy were much more likely to report symptoms of depression, stress and anxiety. So, for example, a poor person living on a logging road in the Chequamegon-Nicolet National Forest was more likely to be happy than a wealthier person living on a treeless block in Milwaukee.

San Francisco has among the smallest tree canopies of any major city, and the number of trees is shrinking each year. The “Natural Areas Program” plans to cut down 18,500 trees. Every project, whether it’s a playground renovation by SF Recreation and Parks, or road improvements by SFMTA, or water system work by the SF PUC, becomes an excuse to cut down more trees. If they replace the trees at all, it’s with saplings that will take decades to become mature and provide those health benefits.

Wisconsin has to contend with the Emerald Ash Borer, a beetle that is killing off ash trees as voraciously as California’s Sudden Oak Death is killing our oaks. San Francisco, with its windy climate, doesn’t have many oaks or Sudden Oak Death, nor does it have ash trees and the Ash Borer. The main pest killing off San Francisco’s trees is the chainsaw.

Fighting The NAP Nativist Agenda

Once in a while, we want to affirm the values that San Francisco Forest Alliance stands for. We’re a grass-roots organization of people who love nature and the environment, pay taxes responsibly, and want access to our parks and wild places – with our families.

Citizens care about their city Parks, and want to keep healthy trees and to open access to natural areas. Citizens expect city management to act responsibly and in the public trust, for FAIR allocation of 2008 Clean & Safe Neighborhood Parks Bond funds.

SF Recreation and Parks Department (SFRPD) and particularly the Natural Areas Program (NAP), obsessed with Native Plants, is cutting down trees, restricting access, using more toxic herbicides than any other section of SFRPD (excluding Harding Park Golf Course), and using financial resources that could better be used for things our city’s residents really want.

OUR VIDEO

Watch our video on Youtube, (where you can also sign up for the SF Forest Alliance Youtube channel):

OUR MESSAGE TO SAN FRANCISCO AND SFRPD

What we stand for can be summarized in four key areas: Trees, Access, Toxins, Taxes.

 

Improvements to the Glen Canyon Park Playground?

Last month we reported on the status of the Glen Canyon Park Playground Improvements.
We mentioned the new playground and that it will not be the same as it was:-  a steep staircase to the slide and bushes that were at the top – now gone. The kids loved that slide … they played games of imagination and adventure there. Instead of a quirky playground that used the advantages of the site, there’s a standard-issue place that could have been built anywhere. And the wonderful climbing tree the children loved, which was behind the Rec Center – it is now gone.

In honor of the Glen Canyon Park Playground re-opening on March 15th, we are re-issuing a relevant YouTube video

Help us save the urban forests in our San Francisco Parks

Glen Canyon Park: One Year after Start of Tree Destruction

The Glen Canyon Playground and Tennis Court Project – as the city is calling this – is nearly completed. In February or March 2014 there will be great fanfare at the completion of this project.

Video update to the Glen Canyon Park tree demolition project

Is it an improvement? Well, there is a new playground at least, but it will not be the same as it was: a steep staircase to the slide and bushes that were at the top – gone. The kids loved those; they played games of imagination and adventure there. Instead of a quirky playground that used the advantages of the site, there’s a standard-issue place that could have been built anywhere.  And the wonderful climbing tree the children loved, behind the Rec Center – also gone. The new kids will not know what they missed.

The City Arborist report stated that only 1 tree was truly hazardous, yet 42 trees were destroyed. Equally troubling is the deliberate relocation of tennis courts that destroyed 11 healthy and majestic Eucalyptus guarding the Park’s entrance.

Question: Why was there no attempt to incorporate these trees into the overall design goal that could have been achieved without sacrificing space for the playground and ball field?

Answer: San Francisco taxpayers “purchased” a native plant garden as part of the project and ensured all those “poor suitability / non-native” trees were eliminated.

Functional, Beautiful Ecosystems Should Be Left Alone; the Parks need maintenance, not destruction.

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YouTubeChannel-HomePage

YouTubeChannel-HomePage

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