Page updated: June 26, 2016



A California Chapter of the National Audubon Society Serving the communities of Stockton, Lodi, Tracy, Manteca, Escalon, Ripon, and Lathrop--All of San Joaquin County.



Places to Visit on our Website

Chapter Officers & Board Members 

Program and Field Trip Information 

Field Checklist of the Birds of San Joaquin County

Bird Sightings in San Joaquin County

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Other Web Pages to Visit


All About Birds-Cornell Online Guide to Identifying Birds

· Help with Identifying Birds

What to do with an injured or orphaned bird

Wildlife Rehab Information

Central Valley Birds Listserve

San Joaquin Birds Listserve

National Audubon Society 

Central Valley Bird Club 

California County Geographic Birding Guide 

Kern River Preserve

Artist Keith Hansen

Artist Rene C. Reyes

Go Green

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Hoot Owl July-August 2016

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Hoot Owl November-December 2015

Hoot Owl September-October 2015

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Hoot Owl May-June 2015

Hoot Owl March-April 2015

Hoot Owl January-February 2015

Hoot Owl November-December 2014

Hoot Owl September-October 2014

Hoot Owl July-August 2014

Hoot Owl May-June 2014

Hoot Owl March-April 2014

Hoot Owl January-February 2014

Fighting for Central Valley birds
Central Valley wetlands have never received the water they need to support migratory birds.

     Audubon California continues to advocate for water deliveries to support bird habitat in the Central Valley. Although the wetland refuges have never received their full allotment of water, drought has made it even more difficult to get these habitats the water they need to support migratory birds.
John Muir walked through the San Joaquin Valley in 1868 and described it as "the floweriest piece of world I ever walked, one vast level, even flower bed ... a smooth sea, ruffled a little in the middle by the tree fringing of the river and of smaller cross-streams here and there."
     At that time, the meandering Sacramento and San Joaquin rivers and their tributaries created extensive river habitats and wetlands that supported large numbers of migratory birds, wild salmon and large mammals. Then we divided the forests, drained the wetlands and dammed the rivers to build farms and cities. In the 1930s, California built the Central Valley Project and the State Water Project to pump water into these expanding agricultural and urban areas. Soon more than 90% of the valley's wetland habitat was gone, leaving just a patchwork of refuges. Waterfowl populations dropped from historic levels as high as 40 million to as low as 5 million today.
     Recognizing this environmental deterioration, Congress in 1992 set minimum water allocations so the refuges could meet basic wildlife needs. A lawsuit and 2006 settlement agreement compelled state and federal government to restore the San Joaquin River.
     The refuges, however, have not once received their congressionally mandated amount of water, even in wet years.
     Conservation advocates are sympathetic to the challenges that communities and farmers are facing, and understand that there will be cutbacks in water for the environment. All the major laws governing environmental allocations, including the Central Valley Project Improvement Act and the San Joaquin River Restoration Act, already contain stipulations that either reduce water deliveries or halt them altogether during drought.
     Central Valley wetlands are of hemispheric importance, providing the most important stopping point on the Pacific Flyway for five million migratory waterfowl, which makes up 60 percent of the Pacific Flyway waterfowl population and 20 percent of the continental population.  These wetlands also provide essential habitat for hundreds of other species, including resident waterfowl, such as mallards, other waterbirds, such as tricolored blackbirds, glossy ibis and Sandhill cranes, as well as other wildlife.
     Local, state and federal agencies have invested in refuges for decades to protect their value for birds, other animals and nearby communities. Destroying them would only endanger California's already fragile wildlife and degrade the other services refuges provide, such as groundwater recharge, water quality improvements and recreation.
     Audubon California continues to advocate both in Sacramento and Washington, D.C., to ensure that birds get the water that has been promised them.

© 2015 National Audubon Society, Inc.  Article courtesy of Audubon California at

20th Annual

November 17-20, 201​6
Stockton Hilton Hotel, Stockton CA

The Central Valley Bird Club will be hosting the 20th Annual Central Valley Birding Symposium November 17-20, 2016 at the Stockton Hilton Hotel in Stockton, CA.  Please come and help us kick off this year’s CVBS!  Come meet the CVBS board & staff members! Reconnect with old friends!  Meet new ones!
Our keynote speakers and programs are always entertaining and informative, and a variety of Saturday and Sunday workshops combine learning opportunities with hands-on experience.  

Friday, Saturday, and Sunday field trips visit some of the best birding spots in the Central Valley. Add in the always entertaining and educational Bird ID Panel, the wonderful display of art and gifts for yourself or others at the Birder’s Market and the camaraderie of hundreds of like-minded folks, and you know you’ll have a good time! There's something for everyone interested in birds. Come and join us to bird, learn, and just have fun!

More information on this year’s event will soon be available on our website

Working Lands:

Partnering with Landowners to Protect Birds

Audubon California is increasingly working with the owners and operators of working lands throughout the state to increase the value of these properties for birds and wildlife. We do this by working with landowners to modify land management practices and encouraging restoration of native habitats in these landscapes.
One of the biggest transformations in California over the last 150 years was the conversion of millions of acres of natural wetlands, grasslands, and stream-side forest to create one of the world's most productive agricultural landscapes. While this resulted in the irreparable loss of habit for birds and wildlife, the reality is that we must find ways for conservation and agriculture to coincide. Private agricultural lands encompass 25 million acres of open space in California - fully one-quarter of the state. Fortunately, we are learning that farms and ranches can be effective surrogates for natural habitats that have been lost and, when appropriately managed, can support wildlife diversity approaching that found on natural lands.
Private lands are vital for a diversity of wildlife, including 60 percent of the threatened and endangered species in the U.S. The importance of private lands for birds is particularly evident. Over 200 bird species in California depend on agricultural habitats for at least part of their annual life cycle. This is not difficult to imagine when witnessing the still spectacular congregations of birds in agricultural fields of the Central Valley during migration and over the winter, where large patches of white indicate where as many as 100,000 Snow Geese have gathered in a single field. Millions of water birds rest and feed in wetlands provided by winter flooded rice fields in the Sacramento Valley and it's estimated that 70 percent of the food needed to support the more than 5 million waterfowl wintering in the Central Valley every year is produced by private agricultural land.
© 2015 National Audubon Society, Inc.  Article courtesy of Audubon California at

      Global warming is the greatest threat to birds and other wildlife in human history. The rate of global warming is already impacting birds, their prey, and their habitat. Those impacts will become more severe over the coming decades, leading to the loss of one-quarter to one-third of all species on earth, including many bird species.
     Although some amount of change is inevitable, we can still take steps to prevent the most dangerous impacts of global warming and begin to stabilize the climate again. In the meantime, conservation, especially of larger areas with migratory corridors and buffer zones; better control of invasive species; and adaptive management are critical to stem the loss of bird and wildlife species.
     This loss will impact agriculture, forestry, public health, recreation, and hunting.  The financial impact will be many billions of dollars annually.

Why Does Global Warming Matter for Birds?
     Global warming impacts birds and wildlife in many ways. Birds and other wildlife will face habitat loss due to sea level rise, more frequent and severe wildfires, flooding and droughts, invasive species, changes in vegetation and precipitation, and loss of snow and ice, among others. Birds, like most species, are highly adapted to particular vegetation and habitat types.
     To compensate for the warmer temperatures, the ranges of these habitats may move closer to the poles or higher elevations. Habitat types that cannot colonize new areas may rapidly decline or cease to exist. New pests, invasive species, and diseases will create additional risks. The timing of birds’ migration, reproduction, breeding, nesting, and hatching are all highly adapted to match specific local
conditions, such as the availability of suitable habitat and adequate food sources.
     Since climate change will affect different species differently, bird behavior may no longer be in sync with their food sources and other habitat needs. For example, robins in the Rocky Mountains arrive an average of two weeks earlier in spring than they did a few decades ago, but the worms and other food that they eat are not yet available for their newly hatched offspring.

Is Global Warming Already Affecting Birds?
     Scientists are already seeing alarming impacts of global warming on birds. More than 80% of plant and animal species studied have shown changes in the timing of migration or reproduction, shifts in habitat or migratory routes, or other changes associated with climate change. Some of the observed
impacts on birds include:

• Several North American warbler species have shifted northward more than 65 miles. The Golden-winged Warbler’s range has moved nearly 100 miles north just in the past two decades.
• Between 1971 and 1995, many British bird species began laying their eggs an average of nine days earlier each year. A dozen species in Great Britain have shifted their ranges an average of 12 miles northward in the past 20 years.
• On Michigan’s Upper Peninsula, 15 species—including the Rose-breasted Grosbeak and Black-throated Blue Warbler— are arriving up to 21 days earlier than in the 1960s.
• Adelie Penguins are taking longer routes to find food in the ocean as icebergs break off the Ross Ice Shelf.

Will Some Species or Habitat Types Be More Vulnerable than Others?
     Birds that already live at high altitudes or latitudes may not be able to move with the changing climate. Endangered species with limited habitat or small gene pools may also not be able to adapt quickly enough to avoid extinction. Coastal and polar species will be vulnerable as coastlines advance inland and ice melts. Sea level rise and erosion will jeopardize the threatened Western Snowy Plover and other shorebirds.
     More frequent and severe droughts in the central U.S. are likely to cause prairie pothole wetlands to dry up, jeopardizing millions of waterfowl during breeding season. The projected loss of neotropical migrant songbirds is very high:  53% in the Great Lakes region, 45% loss in the Mid-Atlantic, 44% loss in the northern Great Plains, and 32% fewer in the Pacific Northwest.

Why Can’t Birds Adapt to Global Warming ?
     In the past, species and ecosystems were able to respond to global temperature shifts in part because average global temperatures changed slowly. As they did, habitat patterns changed gradually and wildlife could either follow their preferred habitat to new locations or adapt to new conditions. Now, though the change is simply too
 fast for many species to adapt. The rate of temperature increase over the next century will be ten times faster than the rate of increase since the last Ice Age. In addition, species that could otherwise move or adapt are now limited by urban and industrial development, large-scale agriculture, and adjacent habitat fragmentation and
destruction. For instance, the endangered Red-cockaded Woodpecker in the southeastern U.S. depends on mature pine forest, a habitat type that cannot spread to new areas quickly or at all.

Why is Loss of Bird Species Important for People?
     Birds have great economic and personal value to people. One-third of all human food comes from plants that are pollinated by birds, butterflies, and other wild pollinators. Birds also disperse seeds and help to control rodents, insects, and other pests that would otherwise devastate crops, forests, and ecosystems. In the western
U.S., Savannah Sparrows, Sage Thrashers, egrets, and other birds help control grasshopper populations that would otherwise destroy many crops. In the eastern U.S., nesting wood warblers consume 84% of the eastern spruce budworm that would otherwise decimate forests.
     Birds are loved for their aesthetic value, playing an essential role in the U.S. economy and improving the quality of life for many Americans. More than 80 million Americans observe, fish, hunt, and otherwise enjoy birds and other wildlife. Together, they support more than 2.6 million jobs in the U.S. According to the U.S. Fish and Wildlife Service, America’s 46 million birders spend $32 billion annually, generating $85 billion in overall economic output and $13 billion in state and federal income taxes.

From Fact Sheet: Global Warming and Birds, copyright © 2014 National Audubon Society


Volunteers are needed to conduct roadside Breeding Bird Survey (BBS) routes in California in 2016.

The routes need to be run just once each year during the months of May or June; exact dates vary with each route. The main requirement for volunteering is the observer needs to be able to identify most of the birds along the route by call/song, and all by sight.

California has 228 BBS routes and currently has 94 routes that are vacant.
If you are interested in volunteering for a survey route or two, please contact:

Daniel Applebee
California Dept. of Fish and Wildlife
1812 Ninth Street
Sacramento, CA  95811
209-588-1879 (Phone)


eBird Mobile

The new eBird Mobile app makes it possible to collect and submit observations directly to eBird from the field.  iOS and Android users who were accustomed to entering eBird data using the BirdLog app are encouraged to switch to eBird Mobile, the new and official app for entering data to eBird.

Merlin Bird ID

In a breakthrough for computer vision and for bird watching, researchers and bird enthusiasts have enabled computers to achieve a task that stumps most humans—identifying hundreds of bird species pictured in photos. Build in concert with the exceedingly popular Merlin app, the Merlin Bird ID tool lets you upload an image of a bird that you’ve photographed, and if the photo shows one of the supported species, it returns the correct species in the top 3 results, 90% of the time. It currently supports 400 species in North America, but will eventually be expanding to more species in North America, and worldwide.  Give it a try.

borrowed from Audubon At Home

Plants for Birds and Wildlife

Planting for birds
Spicebush, photo courtesy USDA-NRCS Plants Database

Birds and wildlife have adapted to utilize native plants that provide food, cover, nesting sites or a combination of resources. Native plants provide food at different times of the year to birds in the form of seeds, fruit or as invertebrate host sites. The growth habits of native plants present recognizable, safe nesting sites and cover that protect birds from inclement weather and predation. The importance of these plants to birds, insects and other wildlife cannot be overstated.

Using native plants in your backyard landscape will offer the most resources to birds and wildlife and serve as rewarding attractants. On these pages you will find some examples of plants that are particularly valuable to specific birds and other beneficial organisms. A more comprehensive database with regional references is in the works at Audubon At Home and will be available online in the near future.

Plantings for birds in our area:

Nuttall's Woodpecker, Oak Titmouse, Yellow-rumped Warbler- California Live Oak

Wrentit, California Towhee, Spotted Towhee - California Wax Myrle

For more information about native plants please visit:

California Native Plant Society

Master Gardener's Program in San Joaquin County

Plants for Beneficial Insects

Predators. Parasitoids. Pollinators.

Welcome them into your Healthy Yard.

These are the insects, bugs and other organisms on the front line of pest control in your yard, guarding against destructive bugs and helping plants reproduce. Nature supplies these beneficial bugs of course, but you can encourage them to remain in your yard by providing them with some essential elements.

Nearly every plant in a natural environment will sustain at least some damage by pests…it is part of the natural balance. But pests don’t overpopulate a natural ecosystem due to the presence of natural enemies. In a healthy yard with its native plants and pesticide-free environment, pests will appear—and so will natural enemies.

THE INSECTS – Wild Friends, Natural Enemies

lady bug
Ladybug feeding on cottonwood leaf beetle eggs, photo by James Solomon, USDA Forest Service

Move Over, Lady - It has long been known that ladybugs (or lady beetles), especially in their larval stage, are "good bugs" with voracious appetites for aphids. Without dismissing the value of ladybugs as garden friends, there are other natural pest enemies that are much less conspicuous but even more valuable. The lowly "gnat" that flies by your ear may in fact be the tiny eulophid wasp – a full-grown one is just one-eighth inch – on her way to lay up to one hundred eggs in the pupae of tree-destroying beetles.

Predatory and parasitoid flies and wasps are key players in the biological control of insect pests. Many, in fact, are reared in laboratories and dispersed into crops, forests and neighborhoods to control exotic insect pests (i.e. elm leaf beetle). Click on the link below to learn more about the tiny denizens of your yard and other beneficial organisms.

THE PLANTS – Nectar for Natural Pest Enemies

hover fly
Syrphid (hover) Fly, photo by Carl Dennis, Auburn University

Nectar is an important dietary supplement for beneficial wasps and flies. Asters and their cousins (such as daisies and goldenrod) offer excellent resources and there are native varieties in every part of the country. Flowers that are composites - where many small symmetrical flowers occur in a central disk - are perfect for small wasps and flies such as the common predaceous hover fly (pictured left). Many of the beneficial insects are small and require a short flower structure in order to access the nectar.

These same flowering plants will attract a wide range of important pollinators such as native bees, butterflies and honeybees. When they produce seed, these plants will provide a valuable food source for birds and other wildlife in the fall and winter.

Plant a variety of plant types such as groundcover, trees, and shrubs, mimicking natural growth patterns to form complex habitat that will be home to a greater variety of beneficial insects.

THE INSECTS – Information and pictures of the lesser-known but effective natural enemies that occupy your backyard.

PLANTS TO ATTRACT BENEFICIAL INSECTS – Your guide to some stellar examples of the useful plants that will attract a variety of beneficial insects. Look for examples of similar native flowers occurring in your region.






Joe-pye Weed


For more information about beneficial insects please visit:

Xerxes Society

Beneficial Insects in Your Garden


If you’re interested in finding out what rare and unusual birds are being seen in California (or anywhere in the US, for that matter), you should check out Sialia, aka The Birding Lists Digest.  Sialia ( was created to help birders find out "what's going on lately" in various regions of the U.S. with a minimum of hassle. The Digest automatically compiles all posts to dozens of birding email lists and organizes them by region, by day, and by list. Birders can view the current day's messages, or browse messages from the last 30 days. This system allows birders to find information about rare bird sightings and other goings-on around the country in a timely and efficient manner.  Check it out!


April 5th, 2016 – June 1st, 2016
(All sightings pertain to San Joaquin County)
Submitted by Liz West

Jim Rowoth, John Blades, Kurt Mize, and Terry Ronneberg on a scouting trip to Kiln Canyon on April 6th saw a Calliope Hummingbird. The San Joaquin Audubon field trip saw one April 13th at Kiln Canyon.  On a visit April 20th to Kiln Canyon, Jim Rowoth found a Costa’s Hummingbird.

On April 23rd Breck Breckenridge photographed a Ruddy Turnstone at Lodi Sewage ponds.  He discovered it when he started looking at his photos.

David Yee saw a Greater Scaup at the Tracy Sewage ponds May 1st.

On May 22nd, David Yee had a couple of rare spring sightings, a Red Crossbill flew over Atherton Park and a Solitary Sandpiper flew around the lake at Oak Grove Regional Park.

Steve Gatz, on a trip to Westgate Landing park with Pat and Dave Croft, spotted the return of the mostly Baltimore Oriole May 23rd.

At Heritage Oaks Winery along the Mokelumne River, David Yee heard and saw a possible Cordilleran Flycatcher, May 26th.  It behaved aggressively towards a recording of a Cordilleran Flycather.


San Joaquin Audubon Society
PO Box 7755, Stockton, California 95267

For more information contact:
San Joaquin Audubon Society President: Dale Smith,

Send website comments or questions to:

Kasey Foley:




For San Joaquin Audubon Field Trips visit our Field Trips Page.




 Membership in the National Audubon Society includes:


San Joaquin Audubon's Hoot Owl newsletter 6 times per year.

AUDUBON magazine.

Monthly field trips led by San Joaquin Audubon members.

General Membership meetings from September-December and February-April.  We often have local experts presenting topics such as Beginning Birding, Gardening for birds and butterflies, Raptor Rehabilitation, Sandhill Cranes-our local winter wonders, Swainson's Hawk conservation, Slide presentations on trips to Mexico, Galapagos, Honduras, Florida,and much, much more.

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