5 
to 8 November) were found largely in Section T, the typical high-density 
area throughout the summer and fall. The usual slick areas were not 
noted, however, in conjunction with the Phalaropes during the previous 
survey, although slicks were found further south. During this survey 
the slick areas and the Phalarope concentrations were again found simul¬ 
taneously, but about 100 miles south of the old n T” area locations. The 
importance of the simultaneous occurrence of Phalaropes and the slick 
areas should be stressed; no other species shows such a high positive 
correlation with an environmental parameter. More needs to be known 
about the slicks themselves. Phalaropes, one of the major elements of 
the Grid avifauna, are as yet the least understood. The sex ratio of the 
19 birds collected on the l 8 th heavily favored females l4:4 (l not sexed). 
Winter and spring 1967 collections indicate that females apparently 
winter in the Grid area while most males move further to the south. 
High priority should be given to obtaining a large series of this in¬ 
teresting species. 
Jaegers # Obs. = 18 
Stercorarius sp. 
0 .048 .188 
0 0 .190 
0 0 0 
Linear density 
Pomarines were positively identified and I feel that most, if not 
all, Jaegers were indeed this species. Two adults (l light and 1 inter¬ 
mediate phase) were seen but most of the sightings appeared to be non¬ 
adults, generally light phase. The distribution within the Grid is 
clearly a function of proximity to the coast. 
Skua # Obs. - 1 
Catharacta skua 
One skua was seen heading south in Section S on the 17 th. 
Glaucous-winged Gull # Obs. = 2 
Larus glaucescens 
The two sightings in Sections U and Y were of first winter-plumaged 
birds. 
Herring Gull # Obs. = 18 
Larus argentatus 
No birds were recorded in the southern third of the Grid in the 
early November survey. During the present survey two immatures were 
logged in Sections X and Z representing the southward movement of the 
species, especially of the immatures (see Figure 2). The three adults 
recorded were all in the northern half of the Grid. 
