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. Go on a field trip, or volunteer at a conservation event. Whatever your interests, MDAS can help deepen your connection to local birds and birders.

Volunteers Needed

MDAS has the following positions available for anyone with an interest in supporting our mission of Connecting People with Birds.

Outreach Coordinator is responsible for coordinating volunteers to staff MDAS booths and tables, etc at local festivals and other public events at which MDAS has a presence. This is an MDAS Board position.

The Quail Editor is responsible for the publication of the monthly chapter email newsletter. This is an MDAS Board position.

If you or someone you know is interested in any of these positions, please send an email to MDAS President Jerry Britten at . For more information about the responsibilities of these positions, click HERE.

Upcoming Events

Dec 08

MDAS Field Trip — American Canyon Wetlands

DECEMBER 8 @ 8:00 AM - 12:00 PM

American Canyon Wetlands Thursday, December 8, 8AM-Noon A walk out to the wetlands, ponds and sloughs along the Napa River produces many exciting birding opportunities. We expect plenty of waterfowl, raptors, waders, shorebirds and passerines. It can be quite cold in this area, so bring appropriate warm layers. Availability of rest rooms is uncertain. Rating: […]

Dec 10

MDAS Field Trip — Solano County Raptors

DECEMBER 10 @ 9:30 AM - 2:30 PM

Solano County Raptors Saturday, December 10, 9:30 am to mid-afternoon This trip features wintering birds on the edge of the Central Valley. Ferruginous Hawks and Rough-legged Hawks are special targets, and Prairie Falcon and Burrowing Owls are possible. Grassland birds and blackbirds, and ducks and shorebirds at Jepson Prairie (if there is water), where we […]

Dec 14

2022 East Contra Costa Christmas Bird Count

DECEMBER 14

The 23rd Annual East-County count will be held Wednesday, December 14. Again, you can participate by being part of a group in the field, or by doing a count at your property if it is within the East-County Count Circle. If you’d like to participate, please send an email to . The countdown event for this one is again virtual, at 7 PM […]

Dec 17

2022 Central Contra Costa Christmas Bird Count

DECEMBER 17

The 68th Annual Central Contra Costa Christmas Bird Count is scheduled for Saturday, December 17, and participants are needed! You can participate by being part of a group in the field, or by doing a count at your property if it is within the Central-County Count Circle. We have many routes to cover with varied habitats and varying degrees of walking involved, so there […]