Diurnal density of Species Groups in the Southern Grid, 2-9 May 1966 
TABLE 2. 
Estimated Pop./ 
Species Group 
No. Birds 
Birds/Sq. Mi. 
57,600 Sq. 
Shearwater-Petrel 
169 
0.124 
7,142 
Storm Petrel 
89 
0.130 
7,488 
Terns 
4,498 
2.192 
126,259 
Tropicbirds 
1 
0.001 
58 
Boobies 
267 
0.196 
11,290 
Frigatebirds 
96 
0.035 
2,016 
Shorebirds 
3 
0.004 
230 
Jaegers & Skuas 
1 
0.001 
58 
Miscellaneous 
3 
0.003 
172 
5,127 3*748 213,885 
7. Total 
Birds 
3.30 
1.74 
87.73 
0.02 
5.20 
1.87 
0.06 
0.02 
0.06 
100.00 7. 
TOTALS 
