1 Eastern Grid Survey #19 During 658 miles and 65 hours of observation, 349 birds of 13 species were recorded. One hundred ninety (54.5 percent) of these were ship follo- wers (gulls & albatross) and warrant separate statistical consideration. Highlights: 1) No diurnal coverage in N.E. Section of Grid. 2) First progression toward "normal" winter distribution in the Grid. 3) General low density due at least in part to observing conditions. 4) First recorded pelagic observation of Guadalupe Fur Seal (Arcto- cephalus townsendi). Problems: With the short days of December, it has become impossible to achieve equal diurnal coverage in all sections of the Grid. During this survey no diurnal coverage was achieved in the northeast corner, the area which acts as a qualitative indicator for the entire Grid. Secondly, observation of ship followers has become more complicated than during spring, summer, and fall surveys due to the presence of gulls. Albatross were eliminated from the tabular examination of earlier grid surveys, and now it becomes necessary to remove the gulls. But gulls and albatross cannot be treated as equally "qualified" ship followers. Gulls follow for relative short periods of time as evidenced by changes in age composition in the flock throughout the day. One arrives at a daily total by summing maximum numbers of all age classes of a species. The amount of individual interchange in the flock cannot be determined. It appears that gulls (Herring & Glaucous-winged Gulls) may be "good" pelagic/oceanic seabirds but that their ship following tendency makes it impossible to treat accurately their quantitative distribution. Density (Non-followers) Density (Ship-followers) Density (Total) .660 .550 - .857 .335 - 1.517 .885 - .094 .098 .259 .132 .804 .592 .226 .902 .851 .029 .034 .048 .159 .966 .355 .188 1.000 .403 Species (Total) 9 | 11 | - 6 | 5 | 8 5 | 4 | 6