Christman, S. M. 1960 Agelaius tricolor Oct. 2 Nesbitt Ranch (Cattail Club), 10 mi. S. Mareyville, Yuba Co., Calif. while working in *2 pond, about 11 a.m. a ? was seen flying west with long streamers of nesting material in her bill. She flew to the dense Typha stand 35 yds. W. of the N. end of *2 levee. I entered the marsh at a point about 50 yds NE of the flow outlet below *1 pond. Cattails were extremely dense. Went in some sixty feet circles & came out by another route - a total of 17 nests were found. All were damp, had fresh green grass in lining & Lemna glued to strands of Typha leaves. The first two or three nests were empty, then 1 egg/ nest; near the deeper penetration of the colony- Typha stand one nest contained 2 eggs, another three eggs. In all, of the 17 nests, 3 contained one egg/ nest, one with 2 eggs, one with 3 eggs; total 9 eggs. These were collected & opened. Six was incubating - 1 1/2-2 mm bastofibris - light orange, yolk orange. One dark red-orange yolks no disc seen; another, same, but question presence of disc. The fresh nests were consistently higher in the cattails than the remnants of the older spring nests. Water depth was 2 1/2 ft. - the new nests were up to 4 ft above water level? During the several hours when this colony was under observation birds were flying out of colony & to the east and from the east to the colony, in single & small groups of 5 to 25.