FIELD NOTES Dong Bell LOCATION: ALCATRAZ I. DATE: May 14, 1987 TIME: 9:30 AM WEATHER: clean, sunny, moderate-light wind TIDE: Low, Rock 1.4M exposed +4m cement. 9:31 on cistern: 18 birds incubating, 36 gulls on perimeter, 9 on platform. Major stand-off between pairs 22/23. 9:49 Watching pair 11 - 36 gulls on perimeter; 11 on perimeter. 9:54 Incubation heard but not seen. Heard up till now 2 other copulations. 9:57 - 8 of 11 nudging male - to get off nest. 10:00 AM - Colony. 8/11 had tried to relieve male of incubating duty - she attempted stroking his back with leg. 10:12 - Pair 28 32 birds on perimeter, 10 on platform. 8 on nest, 5 not around. 10:23 - Colony watching - a 3 yr bird is flying about the colony. 10:45: 24 birds incubating - 30 on perimeter, 9 on platform. 13:00 - Video recording gulls on cistern. Got nice sequence of the male from nest 33 "raping" & sitting on nest 31. Same later video sequencer may be no good due to battery problems.