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Our Mission

Clapper Rail

To conserve and restore natural ecosystems, focusing on birds, other wildlife, and their habitats, for the benefit of humanity and the Earth's biological diversity.

Bahia Wetlands

A film on resident wildlife and Marin Audubon’s habitat restoration work underway at Bahia Marsh, on the Petaluma River in Novato, California. Produced by Jeffery Martin as a gift to Marin Audubon.
Watch the film »

Welcome to Marin Audubon Society

For more than 50 years Marin Audubon has worked to protect wildlife habitat in Marin, sometimes stepping in to buy land that is slated for development. We need your help today to purchase a 5.2 acre property that will fill a critical gap in the 300 acre Corte Madera Ecological Reserve.

MAS also provides its members and the public many opportunities to experience the birdlife and nature of Marin County and beyond through Field Trips and Events, our monthly MAS newsletter The Clapper Rail, and the annual Christmas Bird Counts. For a listing of many of our activities and events please check our Calendar.

Corte Madera Ecological Reserve

Please Help Us “Close the Gap” In the Corte Madera Ecological Reserve!

After 20 years of negotiation, Marin Audubon Society has reached an agreement to purchase a critical 5.2-acre former tidal marsh that is key to the survival of the endangered Ridgway's Rail (formerly California Clapper Rail) and other wildlife. This campaign will protect and restore, in perpetuity, coastal wetlands in the Corte Madera Creek watershed, filling a critical gap in the 300-acre Corte Madera Ecological Reserve. The Ecological Reserve includes one of the few marshes around the Bay that has never been diked, as well as 200 acres of restored marsh. Ancient marshes have complex channel systems and vegetation, and support greater diversity and numbers of wildlife. These rare and valuable characteristics will be protected, enhanced and expanded by this acquisition. We need to raise $1,075,000 by May 15, 2015. If the property is not purchased by then, it could be lost forever to shoreline development.

Update - June 2015

Marin Audubon Society and Marin Baylands Advocates have raised $575,000 through donations from many generous organizations and individuals. Our project is the Marin County Board of Supervisors's agenda on June 9 for a grant of $100,000, and on the State Coastal Conservancy's agenda on June 25 for a grant of $400,000. Those two grants will be sufficient to cover the $1,075,000 purchase price for the property. We still need funds to cover for closing costs. Also we have extended the closing date to August 29, 2015.

We have begun raising funds for the restoration of the property to tidal marsh. We expect the restoration, including preparing plans sufficient to construct the project, for permitting and construction, to cost an estimated $500,000.

Read moreRead more and donate to this critical conservation campaign

About UsAbout Us

Mission | History | Board of Directors | Contact Us

Our Mission: To conserve and restore natural ecosystems, focusing on birds, other wildlife, and their habitats, for the benefit of humanity and the Earth's biological diversity.


Bay Area Local Sites and Resources | California |
National & International

An extensive listing of birding and nature resources

MembershipJoin Us

Benefits of Membership | Printable Membership Form [40 KB PDF] | Online Membership Application Form

The success of the Marin Audubon Society depends greatly on our Chapter-Only Members.


MAS Owned Properties | Restoration and Enhancement Projects | History of Bahia

Consistent with its mission, the Marin Audubon Society has been acquiring properties in Marin County with restorable habitat value.


Mission | Triangle Marsh | Bahia

MAS offers many opportunities to meet fellow members and to support our environmental protection and conservation efforts.

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