Weston 1946 Journal March 27, 1946 - Berkeley Alameda Co. to Dillon Beach, Marin Co., Calif & back. Wade Fox and I left Berkeley at 10:45 a.m. to go over to Marin County to look for Thamnophis. The weather is slightly overcast. The past two days have been warm and clear with only a mild westerly breeze blowing. At the Richmond side of the San Raphael Ferry I see the following birds (11:20 a.m): Sparrow Barn Swallow - the first this year California gull - Farallon cormorant Western Gull Western grebe Surf scoter Lesser scaup In the marsh (salicornia) marshes near Petaluma American egrets and California blue herons were conspicuous. Arriving at Dillon Beach around 12:45 p.m. we left the car and proceeded to walk around the area looking for Thamnophis. In this area both T. ordinoides and T. sirtalis occur together. 12:45 to 4:45 p.m. was spent looking for these snakes. During this period we picked up about a total of 20, about half of each species, both sexes. Both the closely grazed (by sheep) grass-covered slopes and the dune area & beach were covered in our search. The following species