Field Trips

A listing of currently scheduled MAS field trips in the bay area and California.

Field Trip Reports

Find out what happened on that MAS trip. Photos too.

Field Trip Ethics

Guidelines for responsible birding

Speaker Series

Programs focus on birds and other natural history and are given by experts in their field. Programs are free and open to the public.

Mother’s Day Picnic

For more than 50 years, Marin Audubon Society and Audubon Canyon Ranch have hosted this delightful fundraiser on Mother’s Day.

Field Trips

Mar 02

The Ponds at Las Gallinas Sanitary District (LGVSD) – San Rafael

MARCH 2 @ 8:30 AM - 11:30 AM

Thursday, March 2, 2023
8:30 to 11:30 AM
Birding with Sande and Bob Chilvers

All participants are welcome to join this trip. No registration required.

Beginning birders are especially welcome on the first Thursday of each month for a leisurely walk around the Las Gallinas ponds. Join our friendly leaders as we search for waterfowl, waders, songbirds, raptors, and shorebirds.

Bird enthusiasts of all levels help each other to find and identify the birds, and there are usually several experienced birders to assist. You don’t even have to arrive on time because we spend the first 30 to 60 minutes studying the birds around the first pond and the group is easy to find. Heavy rain cancels.

DIRECTIONS: From Hwy 101, exit at Smith Ranch Rd. Drive east on Smith Ranch Rd toward McInnis Park. Turn left immediately after crossing the railroad tracks and drive about 0.5 mile through the LGVSD gates and into the parking lot at the end of the road. Meet the group by the bridge just past the parking lot. There is an outhouse in the parking area for public use.

Mar 04

Birding in Marin – Mt Tam and Corte Madera Marshes

MARCH 4 @ 8:30 AM - 3:00 PM

Birding in Marin, Season 8 – Trip 3
Saturday, March 4, 2023
8:30 AM to mid-afternoon
Birding with Jim White and Bob Battagin 

CLICK HERE to sign up for this field trip

Registration opens Wednesday, February 22 at 8 AM. Trip limit is 15 fully vaccinated participants. No drop-ins, please. 

Mount Tamalpais, rising like an icon above Marin, hosts some birds uncommonly seen in the rest of the county such as Pileated WoodpeckerRed-breasted NuthatchPurple FinchRed Crossbill, and in the winter, 1 or 2 Townsend’s Solitaire.

About twenty years ago our friend Dave MacKenzie discovered a TOSO feeding on mistletoe berries in some Sargent Cypress trees along the trail to Barth’s retreat and the bird or its children have returned every year since! But the trail, built by the CCC, (California Conservation Corp), back in the 1930s has not withstood the test of time quite as well. So, if you are up for a vigorous though short (3.5 miles) hike, join us to see what we can find.

After our lunch break back at Rock Springs with fine picnic tables and a restroom, we intend to drive down to sea level to look at the Corte Madera marshes. This area is very birdy, so depending on the tidal height, we expect to see a lot of birds there. Wintering shorebirds are gearing up for the return to their arctic nesting grounds, so we may be able to see how Black-bellied Plovers got their name. As the shorebirds molt into their breeding plumage, if we are diligent, we might even be able to tell the two Dowitcher species apart.

DIRECTIONS: Meet at Rock Springs at 8:30 a.m. From Hwy 1 in Stinson Beach or up 3.3 miles from Tam Junction, take Panoramic Dr to its crest then go uphill 1 mile on Pantoll Rd to the Rock Springs parking lot. 

Mar 08

Rodeo Lagoon – Marin Headlands

MARCH 8 @ 7:30 AM - 12:00 PM

Wednesday, March 8, 2023
7:30 AM to noon ** Please note this field trip starts at 7:30 AM not 8:00 AM
Birding with William Legge & David Wiechers 

CLICK HERE to sign up for this field trip

Registration opens February 26 at 8:00 AM. Trip limit is 15. No drop-ins. please.

With early spring migration underway will be looking out for migrant wildfowl, grebes, loons, gulls, and passerines. As usual, the weather will dictate our focus with onshore northwest winds ideal for spring sea watches, while offshore easterly winds promise a good selection of passerine migrants. Join us for a Sea Watch at 7:30 AM or arrive later at 8:30 AM for a circuit of the lagoon.

DIRECTIONS: Head south on Hwy 101 and take the last Sausalito exit just before the Golden Gate Bridge. At the exit stop sign, turn right and go under the freeway, then follow the road down to the left. Within

300 feet turn left at the sign to the Marin Headlands; this is the only available left turn before you begin the descent into Sausalito. You should see the tunnel with the five-minute signal light. Proceed through the tunnel on Bunker Road to the Rodeo Lagoon Parking Lot at the end and meet by the bridge over the channel to the beach.