Keep Learning

Our classes range from Beginning Birding to Birding By Ear to more intensive courses for advanced birders. Experts help you name your usual backyard visitors, and find and ID more unusual species.

Protect Habitat

To protect birds, we must defend the places in which they live. Help us support campaigns to preserve wildlands, wetlands and parklands. Join our Community Science bird count projects, and meet fellow enthusiasts!

Go Birding

Field trips are free and range from half-day local destinations, to longer-distance weekend trips to various birding hotspots. Open to members and non-members alike; enjoy a relaxed and informative stroll with our knowledgeable volunteers.

Keep Learning

Our classes range from Beginning Birding to Birding By Ear to more intensive courses for advanced birders. Experts help you name your usual backyard visitors, and find and ID more unusual species.

Protect Habitat

To protect birds, we must defend the places in which they live. Help us support campaigns to preserve wildlands, wetlands and parklands. Join our Community Science bird count projects, and meet fellow enthusiasts!

Go Birding

Field trips are free and range from half-day local destinations, to longer-distance weekend trips to various birding hotspots. Open to members and non-members alike; enjoy a relaxed and informative stroll with our knowledgeable volunteers.

Connecting People with Birds

The Mt. Diablo Audubon Society is committed to protecting birds and  preserving their habitat, and to connecting people of all ages to the fascinating world of birds, with monthly meetings, field trips, classes, and conservation and advocacy programs. The chapter serves the San Francisco Bay Area’s central and eastern Contra Costa County, a bountiful birding territory in which roughly 350 species have been spotted – 150 of them nesting. We welcome everyone interested in any degree of participation, and at all levels of experience.

Spotlight: Birding Trips

Connecting People with Birds

Wild Birds Unlimited is restarting Bird Walks! Sign up at their store in Pleasant Hill.

Mt. Diablo Audubon Society has resumed field trips after a year-and-a-half hiatus due to the COVID-19 pandemic. Please refer to Birding Field Trips page for more information.

Mt. Diablo Audubon on Facebook

Get Involved

Connecting People with Birds

Take a class, or join our popular monthly programs. Take part in a bird count, or mix with legislators and fellow birders on Advocacy Day. Attend or lead a field trip. Volunteer for a leadership position or at a conservation event. Whatever your interests, MDAS can help deepen your connection to local birds and birders.

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 […]