3 
Table 2. Birds recorded in the Southern Grid, 15-18 July 1968 . 
15 
l6 
18 
Total 
Wedge-tailed Shearwater 
- 
24 
2 
26 
Black-winged Petrel 
- 
- 
1 
1 
White-winged Petrel 
- 
— 
1 
1 
Pterodroma sp. 
- 
- 
3 
3 
shearwater/petrel 
- 
1 
— 
1 
Red-tailed Tropicbird 
- 
2 
2 
4 
Blue-faced Booby 
2 
29 
13 
44 
Brown Booby 
- 
1 
1 
2 
Red-footed Booby 
- 
1 
2 
3 
booby species 
- 
1 
- 
1 
Lesser Frigatebird 
- 
- 
1 
1 
frigatebird species 
7 
7 
1 
15 
Sooty Tern 
42 
711 
156 
909 
Fairy Tern 
- 
1 
2 
3 
Skua 
- 
1 
- 
- 
51 
779 
185 
1015 
Cetacean 
6 
6 
Table 3- Density of species groups in the Southern Grid. 
Group 
Wo. Birds 
Birds/Sp.Mi. 
io Total Birds 
Shearwater/Petrel 
32 
0.11 
3-2 
Tropicbirds 
4 
0.02 
0.4 
Booby 
50 
0.21 
4-9 
Frigatebird 
16 
0.03 
1.6 
Tern 
912 
2.53 
89.8 
Skua 
1 
0.01 
0.1 
1015 
