TABLE 1. Summary of Diurnal Grid Observations, April 1966. 
No. of Birds/ 
Date 
Birds 
Sightings 
Species 
Flocks 
Miles Hours 
Linear mile 
1 April 
3 
3 
2 
0 
42 4.4 
0.07 
2 
254 
34 
6 
4 
135 12.3 
1.88 
3 
414 
30 
8 
5 
114 12.4 
3.63 
4 
389 
51 
11 
n 
138 12.1 
2.81 
5 
299 
49 
8 
7 
123.3 12.3 
2.43 
Totals 
1359 
167 
14 
27 
552 53.5 
2.46 
TABLE 2. Diurnal density of species groups 
in Grid, April 1966. 
Species Group 
No. Birds 
Birds/Mi? 
Estimated Population/ 
50.000 Mi7 
Percent of 
Total Birds 
Shearwater-Petrel 
101 
0.091 
4,550 
7.4 
Tern 
1239 
0.754 
37,700 
91.2 
Tropicbird ' n 
3 
0.003 
150 
0.2 
Booby 
6 
0.005 
250 
0.4 
Frigate 
— 
— 
— 
” 
Storm Petrel 
4 
0.007 
350 
0.3 
Shorebird sp. 
1 
0.001 
50 
0.1 
Miscellaneous 
_S 
0.006 
300 
0.4 
Totals 
1359 
0.867 
43,350 
100.0 
TABLE 3. Summary of Nocturnal Grid Observations, April 1966. 
Date 
No. Miles 
No. Hours 
No. Birds 
No* Species 
1 April 
109 
11.8 • 
7 
2 
2 
139 
11.7 
11 
2 
3 
109 
11.5 
5 
1 
4 
114 
11.7 
22 
2 
5 
2.0 
J. 
i 
Totals 
526 
48.7 
48 
3 
