Petaluma Wetlands Alliance
We support Shollenberger Park, Alman Marsh, Ellis Creek Wastewater Treatment property, and future wetland sites in the Petaluma River watershed. We work with local governments, environmental organizations, and other groups to educate the public about the ecology and value of wetlands.
Photography courtesy of Bob Dyer, Tim Fleming, Gerald Moore, Len Nelson, Thomas Reynolds and Ron Storey
About Petaluma Wetlands Alliance

What is PWA?
Petaluma Wetlands Alliance (PWA) was formed by a concerned group of citizens who banded together in the late 1990’s during the planning and construction of a new wastewater treatment plant in Petaluma, California. We work with schools, government agencies and environmental organizations to help preserve wetlands habitat.

What are Wetlands?
Wetlands are among the world’s most productive ecosystems, providing critical habitat for many plant and animal species. In essence, wetlands are the zones between the land and large bodies of water such as rivers, lakes, or oceans, where water tends to stand for prolonged periods of time. Swamps, marshes and bogs are all examples of wetlands.

How Can I Help?
We’re glad you asked! There are a number of ways you can support the PWA. Financial contributions are always welcome. Since we are a 501(c)(3) organization, your donation may be tax-deductible. If you like to meet and talk with people, check out our our docent program. Or, pick up a shovel and come help us remove invasive weeds as a volunteer.
Latest News
From the editors at Petaluma Wetland Alliance
2017 Feather Fest for Kids
We had 26 kids participating in this year's Feather Fest held at Shollenberger Park under very pleasant conditions. To sum up the day, I've added Peter Colasanti's NBB post: Hi All, The Feather Fest is a spring bird outing for young birders held in the Petaluma...
California alligator lizard
Photos from Urszula Dziri. Text by Pam Williams, John Shribbs, and Dave Barry. Urszula recently spotted a California alligator lizard at Ellis Creek. It was missing its tail, which is common. Pam and John did some research to identify it. Dave Barry stepped up with a...
Coast Guard help remove non-native invasive weeds at Shollenberger Park
On April 6, 2017, a crew of 25 from the Coast Guard Station at Two Rock took a break from their classroom to volunteer their time helping to clear non-native invasive weeds at Shollenberger Park. The crew is finishing a management training class that will help them...
Norris Robert “Bob” Dyer, August 20, 1935- April 3, 2017
NORRIS ROBERT "BOB" DYER, 81 Contributor of most of the photos on this website and resident of Petaluma, California, passed away unexpectedly at his home on Monday morning, April 3rd, 2017. He is survived by his loving wife of 52 years, Brigitte;...
Great-tailed Grackle Nesting, Ellis Creek, 2017
From Bob Dyer, doing what he did best, sharing his love of nature, esp. birds: GREAT-TAILED GRACKLE NESTING, ELLIS CREEK, 2017 My images of Great-tailed Grackle in the Petaluma Wetlands go back to 2006, about the time they arrived here from the...
Red-Shouldered Hawk Pair Are Building a Home
From Bob Dyer: Well, looks like our Red-shouldered Hawk are old enough! March 28. You have seen this before. Female is left and male to the right. March 29. These pictures were taken from 10:15 a.m to 11:00. After the photos, I am providing some nesting...
How You Can Help Right Now
