Marshall, 1946 Melospiza melodia May 5 Tomales Bay, Marin Co., Calif. tules but mostly the marsh is a wide open area of salt Salicornia cut with meandering ditches & sloughs. Tide was out & Song Sparrows were foraging under undercut banks of the sloughs. Very abundant way out in Salicornia marsh where males spaced out 20-50 yards apart each with 2 or so fixed song perches on snags, (drift wood) fence posts, clumps of tules. Also it's singing in fresh-water habitat around edge of marsh. Sibley & I couldn't chase birds from Salicornia to the land - were well established as far out in the marsh as I could see or hear. Was out there about 1 hr. & saw same males in same song perches repeatedly. Generally pairs seen. Most of foraging was along undercut banks. Found one nest in Salicornia tuft 3 ft from small ditch. Nest 8" off ground, in base of Salicornia 4 eggs, I flushed & crept along undercut bank of ditch. This nest only 25 yds from S side of marsh. One or two birds noted flying to thickets at side marsh from immediat