During this period a total of 25 species ( 12.6 per day) plus two 
recognizable subspecies was recorded. Although this is somewhat 
higher than in previous years the latter have been thought to be too 
low and it is believed that this current data are quite normal for this 
area at this time of year. 
The total number of birds recorded was 4,279 ( 2.59 birds per linear 
mile). Although this is almost identical to previous findings it is not 
comparable because of the inclusion of Leeward Island observations in 
this month's data. The number of birds in the vicinity of the Leeward 
Islands is almost always much greater than in more distant pelagic 
jjf \ V • -7 
areas. This greatly increases the final density figures. It is felt, 
then, that the total density of birds within the area for the current 
survey was much lower than expected from previous data. The most con¬ 
spicuous reason for this low density was the relatively small number 
of Sooty/Slender-billed Shearwaters moving through the area. The total 
density for these species was only about 30^ that of previous averages. 
The following report is divided into sections which roughly cor¬ 
respond to three basically different areas, l) includes the area from 
Oahu to the Northern Grid and from the Northern Grid to the Leeward 
Islands. 2 ) includes only the Northern Grid proper. 3 ) includes the 
length of the Leeward Islands from Laysan to Oahu. 
