FIELD NOTES Doug Bell 23 May 1986 LOCATION: Alcatraz I., SF Co., Calif. WEATHER: cold; thin clouds; partial sun. Mod-stingy wind TIME: 11:10 - 11:20 - F legging from M, who just started sneezing. S not forthcoming. F coughed up small fish, swallowed again. Two birds seen on roost with oily breasts - one had ca. 35% of breast & belly badly smeared with black gunk. 11:45 - broke off obs. 12:24 - Courtship feed - new pair on IB -> eel. 11:45-12:15 - Checked perimeter on North End: 14 nests + 7 on walkway. One badly oiled bird 12:40: Courtship feeding - pair nest building on tower of cistern. Male letting food into bill, female taking it. 12:56 - New approach to F to M on nest (IB). Followed by both & hoking. LOCATION: Alcatraz I., SF Bay, Calif. 30 May 1986 Weather: Overcast, cool. Time: 9:00 am - 12:45 on Parade Grounds. Trapping. Set traps out over a 3 egg nest and a 1 egg nest. Caught F off 3 egg nest right away (DAB 068). One-egg nest pair, circling trap, but not willing to go in. After 1½ hrs. I switched traps on both nests. Gull went into trap on 1- egg nest 3 times - but I didn't catch it. Once, trap didn't spring, 2 other times people interrupted. Caught male (DAB 069) Western Gull, mate to F caught earlier. While Ray et al were walking back on SF Fort Mason, we watched a "pair" of 3 yr birds (brown wings, gray heads & backs) go thru mewing, F coughed up food. Some checking movement. Finally F chased/attacked same M. All on rocks in front of beach.