Journal R.E.Johnson 1967 Feb. 5 Berkeley Marina, Alameda Co., California clear, sunny, breeze from S.W. 4:40 PM - 6:00 PM Mudflat exposed near jct of Marina Rd and freeway onramps. Mudflats covered with gulls (mostly along shallow water channels through mud) and sandpipers. About 40 ducks (Canvas backs & Scamp - both 8"1/2 to 9") float in shallow water 15 ft out from shore. They are in a tight group and each is apparently feeding by submerging its head and neck only (not diving) well beneath the water for 2 second intervals (applies to both species). Birds present on mudflats: Western Gull Glaucous-winged Gull Ring-billed Gull Sanderling - as it walks Willett - scattered singly over mudflat Black-bellied plover - winter plumage Mew Gull Killdeer - two Dunlin - small group of 15 + feeding together Godwit - too far away to identify with certainty. The Ring-billed Gull searched the mudflats & picked up objects, including clam shells. Many were bathing in the narrow channel in the mudflats, by standing in the water & submerging their heads & then