PRELIMINARY REPORT-NORTHERN GRID SURVEY NO. JZk- 21 October 1966. 
by Paul Woodward 
During the day of 21 October 1966 the U.S.N.S. SHEARWATER passed through 
the Northern Grid on its way to Oahu. Tho observations mad© during this period 
aro summarized in tho following tables. No nocturnal observations wor© made. 
• — - 
Tho data was gathered by Paul Woodward* Walter Bulkier, Richard Chandler* Richard 
Holden, Lawrence Hubor, John Fitch* Frank Smith* Chris Thompson, and Robert Tuxson. 
A total of 201 birds of 14 species was so on in 11*8 hours of observation 
tine. Wedge-tailed Shearwaters, Sooty Terns, Black-winged Potrols, and Juan 
Fernandes Petrols were the commonest species seen* 
Only ono floc$ w^as soon. It contained 30 Sooty Terns, 30 Wedge-tailed Shear¬ 
waters, 20 Pterodrona externa and 2 f^igatobirds* 
The Grid had boon throughly surveyed earlier in the month*by tho at-sea 
group* On tho whole our findings are very similar to theirs except for the 
number of Wedge-tailed Shearwaters recorded* In six days they saw r 26 individuals 
of this spocios while we saw 42 birds in only one day* 
