Field Notes Location: Alcatraz I, SF Co., CA. Date: March 28, 1982 Weather: clear, sunny. No wind. Time: 9:20 - 10:47 - Tide High-outgoing. On Gistern, about 20 pairs around perimeter of platform, and another 16 gulls on it. Mallard ducks, 2 $ on roof of I.B. About 1/2 the gulls sitting, 1/2 standing. Weather very calm. 9:37 - Pair 22 copulating - 2 min. 9:49 - Pair 14 - F sitting on apparent nest-site, head tucked, sleeping. 9:53 - raised head up, looked around. 9:55 - F got up- moved to another position just to the side, sat down again. 9:57 stood up again, moved back to old position, sat down again. A large male on platform walked over towards her. No reaction. Another pair behind her did long call, then she stood up and did same. 10:05 - are birds choked to another, then a menacing bird came over + chased it & its object of the choker away. 10:08 - mm (3 or ?) on cliff, attracted immediate attention of pair 2, and pair 1; Pair 1 went down to it. After 2 min., he went up to flutter out to platform - chased by pair F, & then flew over to pair 6, which first did aggressive upright, then choked; the inner 3 yr bird then flew away. 10:15 - on platform - one bird did courtship feed to another - bump of chicken & meet. 10:15 pair on platform. F sitting, male standing off w/ another male. 10:20 - still in stand off; occasional jab at other bird. This F is landed, pink /silver. At 10:21 another bird, from territory 26 came over w/grass in bill, elicited the charges from this F. 10:33 - big fight at far end- 2 birds pulling 10:36 - pair 24-under ols - both birds standing close to pair 25, alert, but just looking. Both birds of pair standing on Territory for whole 10 min. Singing White-crowns & Fox Sparrow (1).