3 
Bulwer’s Petrels nearly doubled over July 196h> but over eighty percent 
of these were encountered during the last two days of the cruise through 
the larger Leewards. 
TERNS 
Sooty Terns increased in mmber as we proceeded from Oahu to the grid* 
Over six times as many as last July were recorded in this portion of the cruise. 
Large numbers, including many immatures, were again encountered south of 
Lisianski. Just east of Oahu one bird was observed sitting on the water for 
over thirty seconds. It then flew from the water and joined others which 
were flying along. 
Gray-backed Terns, Noddy Terns and Fairy Terns combined made up 
approximately 9 percent of all terns observed. Most of these were encountered 
through the Leeward Islands. The two species of Noddy Terns (Hawaiian and 
Common) usually were encountered in 'respective' flocks or forming mixed 
flocks. In comparison, the Fairy Tern was often observed singly or in two's 
and tended to range farther from land than did either of the Noddies. . 
TROPICBIHDS 
The Red-tailed Tropicbird outnumbered the White-tailed by over three to 
one throughout the at-sea area. Red-tailed Tropicbirds were also more likely 
to be seen at greater distances from islands. Both species appear to be 
attracted to the ship—moreso than any other species in the area. 
BOOBIES 
» 
Red-footed Boobies were approximately four times as numerous as either 
the Blue-faced or the Brown. Most individuals were seen through the Leeward 
