FIELD NOTES Doug BELL LOCATION: Alcatraz I, SF Bay, CA. DATE: April 26, 1987 - cont. TIME: 12:13-12:45 Weather-sun, but fog at gale. moderate-high wind. is getting stronger. 12:21: watching pair 10 - both sitting on nest territory (no eggs). (Pair 31 count feed- small fish I about 5 fish + 3" long) (population on IB at 12:41 and 12:43) 12:47 Count feed on IB - looked like purplish mass - possibly a baby pigeon or some sort of muscle, with purple part being a shell? Gull nest survey: Cistern only: Scrapers: 13 Nest: 28 Nests on perimeters of cistern: 9 (mostly in metal leaf). One nest on cistern with 2 eggs - in territory 6, next to cement platform. Other kinds seen: few Western Grebes (last week there were still over 100 on the west side. 5 Starlings. Night Herons, see White-crowned Sparrows. Western Kingbird, Imm. Sharp-shinned Hawk - this bird hung around the island for considerable time - soaring + flitting about with the gulls - also seemed to be actively stooping on small birds. Many dives from a good height (100').