Jaegers, ZJ Arctic Terns, a Bonin Island Petrel, 2 Pale-footed Shearwaters, 
and 3 Dark-rumped Petrels. Mottled Petrels were observed in springtime 
for the first time on these cruises. 
The data should be comparable for those of previous cruises. 
Species Account 
Black-footed Albatross 
The range and numbers of this species were very similar this month 
to those of April 1964. Birds were seen only in the northern quarter of 
the area although one bird was attracted south to 17 ° N on the 151° W leg. 
Numbers decreased from March 1 s total of 76 to 26 this month. One bird was 
banded on 12 April. 
Laysan Albatross 
Three birds were seen this month, all in the northern quarter of the 
area. One followed the ship for five hours. Three were seen in April 1964 
in the same general area. 
Wedgetailed Shearwater 
The 519 Wedge-tails seen in April were concentrated in the western 
half of the area, over half of which were within 50 miles from the high 
Hawaiian Islands. A small secondary concentration in the southwestern 
corner was chiefly of southern dark phase birds. This secondary concentra¬ 
tion of dark phase birds was found in the southeastern corner in April 1964. 
Numbers increased 16 0/0 from March, a rise of questionable significance. 
All of the northern birds had distinctly fresh breeding plumage. 
