TABLE 2 Diurnal density of species groups outside the Grid, July 1965* 
Species Group No, Birds 
Oahu to Smithsonian Grid I 
% 
Shearwater-Petrel 6Ul 
Terns 3037 
Tropicbirds 58 
Boobies 8 
Frigatebirds 38 
Total 3782 
Smithsonian Grid I to Lisianski 
She arwa te r-Pe tre1 U69 
Terns 1809 
Tropicbirds 2h 
Boobies 21; 
Frigatebird 25 
Shorebirds 1 
Total 2352 
Laysan to Oahu 
Shearwater-Petrel 2521 
Terns 2723 
Tropicbirds 37 
Boobies 1U8 
Storm Petrels lU 
Frigatebirds 2 h 
Miscellaneous 1 
Total 5U68 
Birds/sq*mi. 
Est. Pop./ 
50,000 sq.mi. 
% Total 
Bi rds 
0.752 
37,600 
17.0 
2.377 
118,850 
80.3 
0.068 
3,U00 
01.5 
0.009 
U50 
0.2 
0.022 
1,100 
161,U00 
1.0 
100.0 
0.590 
29,500 
. 20.0 
i.5i5 
75,750 
76.9 
0.030 
1,500 
1.0 
0.030 
1,500 
1.0 
0.017 
850 
1.0 
0.003 
150 
z 0.1 
109, 250 
100.0 
3.167 
158,350 
U 6.1 
2.281 
lili, 050 
U9.8 
0 . 0)16 
2,300 
0.7 
0.186 
9,3oo 
2.7 
0.035 
i,75o 
0.3 
0.015 
75o 
o.U 
0.001 
5o 
<0.1 
286,550 
100.0 
