TABLE 1. Summary of Southern Grid diurnal observations in September 1965. 
Date 
No. Miles 
No. Hours 
No. Birds 
No. Species 
15 September 
25 
3.1 
441 
7 
16 
' 86 
11.0 
16,668 
14 
17 
113 
12.1 
762 
19 
18 
121 
12.1 
1,271 
17 
19 
106 
12.1 
3,218 
14 
20 
100 
10.6 
13,614 
JL0 
TOTALS 
551 
61.0 
35,974 
24 (13.5/day) 
TABLE 2. Summary 
of Southern 
Grid nocturnal 
observations in 
September 1965 
Date 
No. Miles 
No. Hours 
No. Birds No. 
Species 
16 September 
26 
3.2 
5 
? 
17 
31 
3.3 
13 
3 
18 
30 
3.5 
7 
3 
19 
11 
1.3 
101 
4 
TOTALS 
100 
11.3 
126 
5 
TABUS 3. Diurnal density of species groups (Southern Grid) September 1965. 
Species Group 
No. Birds 
Birds/ sq. mi 
Estimated Population 
% Total 
S hea rwa t er -Pe t r e 1 
29,075 
26.4 
/31,400 sq. mi. 
828,960 
Birds 
80.8 
Storm Petrel 
4 
< 0.01 
< 314 
^ 0.01 
Terns 
6,690 
4.1 
128,740 
18.6 
Tropicbirds 
10 
< 0.01 
< 314 
< 0.03 
Boobies 
72 
<. 0.07 
< 2,198 
0.2 
Frigatebirds 
67 
0.06 
1,884 
0.2 
Shorebirds 
46 
< 0.1 
<-3,140 
0.1 
Miscellaneous 
10 
< 0.01 
314 
< 0.01 
TOTALS 
. 
35,974 
32.6 
100.0 
