CABRIOLE 1956 COBBIN TERN (HYDROPROGNE SABRIS) PART Bay Farm Island, Alameda Co., Calif. 9:15 AM ON - Saw 3 or 4 (or 2 at a time) flying up or down channel at NW corner of Is. Black cap, Red bill [illegible] Grey monthke, black under primaries! PART [illegible] 9:15 AM - saw 2 feeding about 50' out from edge of Salicornia marsh (about 200 ft. from high dry road) Birds circled in area about 20ft in dia. flying about 30 ft above water occ. giving vocal marsh garran note [illegible] drawn-out note ~~~~ given every second or two when birds were when seeking food wings flapping stiffly and bill held almost straight down, at 9:25 one seen flying just above water dipping its bill to touch water for a few inches every 15 ft or so, without stopping in flight. Dipped bill 6 or 7 times [illegible] in the single "run" then swooped up & resumed circling. "Garran" note given by 2 at least 1 of 2 birds as one dived towards & flew along side the other - then they separated with 1 still giving note 2 or 3 times as it flew off to "hunt" again. 1 American egret standing quietly in sunic about 50' away from where terns were feeding, when food(?) was sighted bird merely slowed wing beat & pointing body down slightly