Marshall, 1940 a 18. Melospiza melodia San Pablo marsh, Contra Costa Co., Calif., March 8 a pond. Ned Stone said he saw a black-breasted bird here. The sparrows did not seem to be limiting themselves to any definite areas. Would need more observation to tell. Birds apparently chasing each other all over marsh. 795-6 (again) and 797 were then taken in willows & growth beneath them 1/3 mi. upstream from mouth San Pablo Cr. They were in unworn plumage & no band on head & bill, as in the salt-marsh birds. It's singing all along these willows. Foraging in brush along stream, weeds at edge of willow-growth. 798 taken from willow at mouth Wildcat Creek to south. 5s. very abundant in these willows - about 12 in 100-yds. Confined to the growth along the stream. Very hard to approach. Many singing 7's.