Table 5» Diurnal Abundance of Species in Flocks* 
Species No* Birds % of Population in Flocks 
Wedge-tailed Shearwater 
306 
90 
Sooty Tern 
240 
97 
Juan Fernandez Petrel 
22 
76 
Shearwater-Petrel 
* 
20 
69 
Black-winged Petrel 
12 
86 
Pterodroma externa 
8 
57 
Fairy Tern 
5 
38 
Newell f s Shearwater 
1 
100 
Pea-tailed Tropicbird 
1 
20 
Great Frigatebird 
1 
100 
Frigatebird species 
1 
50 
TOTAL 
617 
NT 
Table 6. Diurnal Abundance of birds within 50 mile Radius of Johnston Atoll. 
No. 
Species Group Birds 
Shearwater-Petrel 99 
Tropicbird ' 2 
Booby 6 
Frigatebird 1 
Tern 112 
TOTAL 220 
Species 
Sooty Tern 11 
Wedge-tailed Shearwater ?8 
Birds/Linear Mile Birds/Square Mile 
1.98 
.990 
.04 
.020 
.12 
.060 
*02 
.005 
2'. 24 
.760 
4.40 
1.825 
.22 
.073 
1.56 
.780 
