April 30, 1947 Mouth San Pablo Creek Contra Costa Co., Calif 28 males heard from road on way back 7:10 - 7:30 AM 1 mile 900 end of willows 870 825 800 Willow, scrub only round Scirpus Artemisia 750 700 alarm 625 600 475 400 Conium 356 300 dock Typha Mallard 250 some round Scirpus 232 200 Canvasback V/ netles V/ Typha 120 100 Conium 6AM all alarm notes, pairs no singing North April 30 mouth San Pablo Creek Contra Costa Co., Calif. 6:00-7:10 AM walked from bridge at edge salt marsh eastward 2050 yds to railroad bridge. Spent 4 period as dawn by Sympeds in following seen alarm notes or pairs unusually calm same flown seen clear sunny calm Singing 1800 Typha boxes 1760 1700 1550 large box elders 1246 All singing 261 1300 Tall trees 180 Box grass, scrubs, elder Boxelder Willows in wild radish Whorelder scrub grass Conium 945 W Typha 900 end willows Mallard, 1947 12:00 Canium Buckeye Artemisia Canium 33 1200 1400 W 1490 trail Blackberry 1600 1800 1900 1960 1980 2000 2050 10 AM 48.