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

Feb 02

Monthly Program: February 2023

FEBRUARY 2 @ 7:00 PM - 8:30 PM

A 27 Year Wildflower Journey: The Making of Beauty and the Beast: California Wildflowers and Climate Change Rob Badger and Nita Winter Rob Badger and Nita Winter take you behind the scenes on their 27-year journey photographing wildflowers throughout California and the West. It began in 1992 when they discovered and fell in love with […]

Feb 04

MDAS Field Trip — Thornton Area/Cosumnes Preserve

FEBRUARY 4 @ 8:45 AM - 2:00 PM

Birding Cosumnes Preserve and the Thornton Area Saturday, February 4, 8:45 AM-2 PM Tundra Swans, Sandhill Cranes, hawks and grassland birds. Trip will go in light rain. Bring lunch and a beverage. If questions, call the leader. Hike rating: 1 – Easy. Elevation change: Minor Distance: Depending on the route decided. Co-Leaders: Ethan Chickering, 925-890-3833 […]

Feb 11

MDAS Field Trip — Shollenberger Park/Ellis Creek — Rescheduled!

FEBRUARY 11 @ 8:30 AM - 3:00 PM

Shollenberger Park/Ellis Creek, Petaluma Saturday, February 11, 8:30 AM – 3:00 PM (Rescheduled from January 14) Both sites are good for wintering waders, shorebirds, waterfowl and a few raptors. Hike rating: 2 – moderate Elevation change: minor Meet: Access point to Shollenberger Park behind the Point Blue parking lot. Leader: Sandy Ritchie (925) 381-2514 Directions: […]

Feb 18

MDAS Field Trip — Bodega Bay

FEBRUARY 18 @ 9:30 AM - 3:00 PM

Bodega Bay Saturday, February 18, 9:30-3:00 Both sites are good for wintering waders, shorebirds, waterfowl and a few raptors. Hike rating: 1-Easy Elevation change: N/A Meet: Porto Bodega Marina, Leader: Maureen Lahiff, , 510-484-6529 Directions: Take US 101 north to Petaluma. Exit at Washington and head SW. Washington becomes Bodega Ave, which becomes Petaluma-Valley Ford Rd, […]