Join Us or Renew Your Membership

Mt. Diablo Audubon Society (a chapter of The National Audubon Society) is a private 501(c)(3) non-profit organization dedicated to protecting the well-being of our community’s people, birds, wildlife, and habitat through conservation, education and advocacy.

We are an independent chapter with our own membership, budget and programs. Membership dues support our conservation and community science efforts.

Our Equity, Diversity, Inclusion, and Belonging Committee creates and promotes an environment that is inclusive, supportive, accessible, and welcoming to all.

Membership Benefits

  • Monthly programs featuring engaging speakers with expertise in avian and environmental issues.
  • Field trips for birders of all skill levels.
  • A subscription to our monthly online newsletter, The Quail, which contains beautiful photographs, info on monthly programs, events and field trips, and links to birding and environmental information.
  • Opportunity to participate in our two Contra Costa County Christmas Bird Counts.
  • Join our Volunteer opportunities for a variety of conservation and community science projects, and public outreach events sponsored by our chapter or in cooperation with other organizations.
Available Membership Options:

New Annual Membership

$25 New MDAS Membership.
$45 New MDAS Membership ($25) plus New National Audubon Society Membership ($20). You will receive the quarterly Audubon magazine.

Renewing Annual Membership

$25 Renewal for existing MDAS Members. National Audubon Society (NAS) will contact you about
renewing NAS membership.

Lifetime Membership

$250 Lifetime MDAS Membership – To be paid in two installments of $250 each.
$500 Lifetime MDAS Membership – Paid in Full.

By Mail:   Print the Membership Application Form. Please make your check payable to MDAS.  Mail to:  Mt. Diablo Audubon Society, Attn: Membership Chair, PO Box 21625, Concord, CA 94521.

MDAS Chapter Links

Upcoming Events

Sep 30

MDAS Field Trip — Outer Point Reyes

SEPTEMBER 30 @ 8:30 AM - 2:30 PM

Outer Point Reyes is a wonderful place for fall migrants, many of them Eastern passerine vagrants. You never know who’ll turn up…sightings in past years have included Blackburnians and Blackpolls; Chestnut-sided, Connecticut, Black-and-white, Magnolia, Prothonotary, Yellow-throated, and Black-throated Blues…and that’s just the warblers. We’ve also seen Yellow-green, Red-eyed and White-eyed Vireos, Orchard Orioles, Ovenbirds, American […]

Oct 07

MDAS Field Trip — Birding by Bike at Clifton Court Forebay

OCTOBER 7 @ 7:30 AM - 1:30 PM

Have a bicycle, e-bike or scooter, and like to bird? Join MDAS at Clifton Court Reservoir in eastern Contra Costa County, where we will do an out-and-back biking/birding trip of approximately 10 miles on a flat, paved levee road, to see a myriad of bird species. Those who are equipped for it can also navigate […]

Oct 21

MDAS Field Trip — Elsie Roemer Bird Sanctuary/Crab Cove, Alameda

OCTOBER 21 @ 1:00 PM - 5:00 PM

The millions of shorebirds that winter on San Francisco Bay make it a state and global Important Bird Area. It is part of the Western Hemisphere Shorebird Reserve Network and is also designated as a Wetland of International Importance under UNESCO’s Ramsar Convention. We’ll start at the viewing platform at Elsie Roemer Bird Sanctuary, which […]

Oct 26

MDAS Field Trip — Lodi Lake & Woodbridge Preserve

OCTOBER 26 @ 9:00 AM - 1:30 PM

We’ll bird first at Lodi Lake and its riparian area alongside the Mokelumne River. Plan to see waterfowl and many bird species including Woodpeckers, White-breasted Nuthatch, Cedar Waxwing, Herons, Warblers and Wood Duck. (We’ve had Varied Thrush in the past but cannot guarantee!) From Lodi Lake we’ll move on to Woodbridge Ecological Preserve, where we’ll […]