4 
GRID AREA 
This area is defined by latitudes 32°30 r N and 3I°30% and by 
longitudes 117 0 45'W and 119 0 l5'W. It was entered at 1200 hours on 
Ik December and left at 1700 hours on 19 December giving a total 
coverage of 55 hours and over 426 miles of diurnal observations* A 
total of 594 birds (10.8 per hour) was recorded within this area 
(See TABLE III)* This is over twice the density found in the Northern 
Grid (4.27 per hour) at the same time. 
TABLE III 
DIURNAL ABUNDANCE OF SPECIES GROUPS 
Species Group _ Number of Birds Birds Per Hour 
Duck 
Albatross-Shearwater 
Storm Petrel 
Tropicbird . 
Pelican-cormorant 
Phalarope 
Jaeger 
Gull 
Tern 
Ale id 
Miscellaneous 
Total 
Ducks: The only birds observed were three Red-breasted Mergansers 
( Mergus serrator). 
Albatross-Shearwater: This group is well represented in these waters 
although the diversity of species is not nearly as'great as that found 
in the Central Pacific. All of the species recorded are likely to occur 
in that latter area and indeed two are known to occur' there in large 
numbers (Black-footed Albatross and Sooty Shearwater). 
3 
0.05 
80 
1.45 
5 
0.09 
2 
0.04 
22 
0.40 
42 
0.76 
11 
0.20 
389 
7.07 
3 
0.05 
15 
0.27 
22 
0.40 
594 
10.80 
