TABLE 2. Diurnal density of species groups in the Southern Grid, 6-11 April 1966 
Species Group 
No. Birds 
Birds/Sq. Mi. 
Estimated population/ 
57,600 Sq. Mi. 
7. Total 
Birds 
Shearwater-Petrel 
191 
0.192 
11,000 
4.70 
Storm Petrel 
196 
0.397 
23,000 
4.83 
Terns 
3312 
2.235 
129,000 
81.54 
Tropicbirds 
• 3 
0.003 
. 200 
0.07 
Boobies 
143 
0.145 
8,200 
3.52 
Frigatebirds 
203 
0.103 
6,000 
5.00 
Shorebirds 
2 
0.004 
200 
0.05 
Jaegers & Skuas 
3 
0.006 
350 
0.07 
Miscellaneous 
9 
0.010 
600 
0.22 
TOTALS 
4062 
4.111 
237,000 
100.00 7. 
