Marshall, 1947 April 26 6:30AM to 8:00 AM Melospiza mouth San Leandro Creek, Alameda Co. Calif. cloudy, cold, calm. male's all singing birds abundant Some singing in planted shrubbery around airport. Fresh-water plants: Typha Acer negundo Conium maculosum Artemesia vulgaris Rubus vitifolius Populus fremontii Salix 1st large patches Conium (brown) in Conium 500 willow 680 brown & white This pair - foraged together in mud among Typha very brown have bob-tailed juvs. out I dirty white Typha sm. patch white blackberry on bank Box Elder = Maple? now contin. trees Singing stopped along in here looks like the birds are scarcer under the 50' trees than in the open. 23+ males in 1500 yards = 1 male every 65 yards of creek 4 data map made in field 39. Salicornia Baccharis Grindelia Hegenberger very black large patch of Salicornia Last Baccharis 1 very brown 5 willows growing high on bank pile of boxes 40yd flight end of Salicornia last extensive muddy banks flat for sandpipers etc. white, dirty tic white heavy, black Artemesia on banks carrying food tic tic sm patch Typha Fic willow looks yellow. willow very yellow q? with reduced black prominent mate is white o? willow 3on stream brown sides of crown white scratch in mud w both feet typha big patch tic tic one yellowish bird alarm white heavy Typha parsley, glass, etch no more typha 600 back yards white & brown 750 poplar slightly fast water here heard R-b Thrush yellowish white alarm, carrying willow about 950 yds cathkins; pursued by female cowbird habitat about 50yds wide here 65 335/1500 = .22 .20